-
Notifications
You must be signed in to change notification settings - Fork 644
/
IDMPhotoBrowser.m
1440 lines (1163 loc) · 49.8 KB
/
IDMPhotoBrowser.m
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
//
// IDMPhotoBrowser.m
// IDMPhotoBrowser
//
// Created by Michael Waterfall on 14/10/2010.
// Copyright 2010 d3i. All rights reserved.
//
#import <QuartzCore/QuartzCore.h>
#import "IDMPhotoBrowser.h"
#import "IDMZoomingScrollView.h"
#import "IDMUtils.h"
#import "pop/POP.h"
#ifndef IDMPhotoBrowserLocalizedStrings
#define IDMPhotoBrowserLocalizedStrings(key) \
NSLocalizedStringFromTableInBundle((key), nil, [NSBundle bundleWithPath:[[NSBundle bundleForClass: [IDMPhotoBrowser class]] pathForResource:@"IDMPBLocalizations" ofType:@"bundle"]], nil)
#endif
// Private
@interface IDMPhotoBrowser () {
// Data
NSMutableArray *_photos;
// Views
UIScrollView *_pagingScrollView;
// Gesture
UIPanGestureRecognizer *_panGesture;
// Paging
NSMutableSet *_visiblePages, *_recycledPages;
NSUInteger _pageIndexBeforeRotation;
NSUInteger _currentPageIndex;
// Buttons
UIButton *_doneButton;
// Toolbar
UIToolbar *_toolbar;
UIBarButtonItem *_previousButton, *_nextButton, *_actionButton;
UIBarButtonItem *_counterButton;
UILabel *_counterLabel;
// Actions
UIActionSheet *_actionsSheet;
UIActivityViewController *activityViewController;
// Control
NSTimer *_controlVisibilityTimer;
// Appearance
//UIStatusBarStyle _previousStatusBarStyle;
BOOL _statusBarOriginallyHidden;
// Present
UIView *_senderViewForAnimation;
// Misc
BOOL _performingLayout;
BOOL _rotating;
BOOL _viewIsActive; // active as in it's in the view heirarchy
BOOL _autoHide;
NSInteger _initalPageIndex;
CGFloat _statusBarHeight;
BOOL _isdraggingPhoto;
CGRect _senderViewOriginalFrame;
//UIImage *_backgroundScreenshot;
UIWindow *_applicationWindow;
// iOS 7
UIViewController *_applicationTopViewController;
int _previousModalPresentationStyle;
}
// Private Properties
@property (nonatomic, strong) UIActionSheet *actionsSheet;
@property (nonatomic, strong) UIActivityViewController *activityViewController;
// Private Methods
// Layout
- (void)performLayout;
// Paging
- (void)tilePages;
- (BOOL)isDisplayingPageForIndex:(NSUInteger)index;
- (IDMZoomingScrollView *)pageDisplayedAtIndex:(NSUInteger)index;
- (IDMZoomingScrollView *)pageDisplayingPhoto:(id<IDMPhoto>)photo;
- (IDMZoomingScrollView *)dequeueRecycledPage;
- (void)configurePage:(IDMZoomingScrollView *)page forIndex:(NSUInteger)index;
- (void)didStartViewingPageAtIndex:(NSUInteger)index;
// Frames
- (CGRect)frameForPagingScrollView;
- (CGRect)frameForPageAtIndex:(NSUInteger)index;
- (CGSize)contentSizeForPagingScrollView;
- (CGPoint)contentOffsetForPageAtIndex:(NSUInteger)index;
- (CGRect)frameForToolbarAtOrientation:(UIInterfaceOrientation)orientation;
- (CGRect)frameForDoneButtonAtOrientation:(UIInterfaceOrientation)orientation;
- (CGRect)frameForCaptionView:(IDMCaptionView *)captionView atIndex:(NSUInteger)index;
// Toolbar
- (void)updateToolbar;
// Navigation
- (void)jumpToPageAtIndex:(NSUInteger)index;
- (void)gotoPreviousPage;
- (void)gotoNextPage;
// Controls
- (void)cancelControlHiding;
- (void)hideControlsAfterDelay;
- (void)setControlsHidden:(BOOL)hidden animated:(BOOL)animated permanent:(BOOL)permanent;
//- (void)toggleControls;
- (BOOL)areControlsHidden;
// Interactions
- (void)handleSingleTap;
// Data
- (NSUInteger)numberOfPhotos;
- (id<IDMPhoto>)photoAtIndex:(NSUInteger)index;
- (UIImage *)imageForPhoto:(id<IDMPhoto>)photo;
- (void)loadAdjacentPhotosIfNecessary:(id<IDMPhoto>)photo;
- (void)releaseAllUnderlyingPhotos;
@end
// IDMPhotoBrowser
@implementation IDMPhotoBrowser
// Properties
@synthesize displayDoneButton = _displayDoneButton, displayToolbar = _displayToolbar, displayActionButton = _displayActionButton, displayCounterLabel = _displayCounterLabel, useWhiteBackgroundColor = _useWhiteBackgroundColor, doneButtonImage = _doneButtonImage;
@synthesize leftArrowImage = _leftArrowImage, rightArrowImage = _rightArrowImage, leftArrowSelectedImage = _leftArrowSelectedImage, rightArrowSelectedImage = _rightArrowSelectedImage, actionButtonImage = _actionButtonImage, actionButtonSelectedImage = _actionButtonSelectedImage;
@synthesize displayArrowButton = _displayArrowButton, actionButtonTitles = _actionButtonTitles;
@synthesize arrowButtonsChangePhotosAnimated = _arrowButtonsChangePhotosAnimated;
@synthesize forceHideStatusBar = _forceHideStatusBar;
@synthesize usePopAnimation = _usePopAnimation;
@synthesize disableVerticalSwipe = _disableVerticalSwipe;
@synthesize dismissOnTouch = _dismissOnTouch;
@synthesize actionsSheet = _actionsSheet, activityViewController = _activityViewController;
@synthesize trackTintColor = _trackTintColor, progressTintColor = _progressTintColor;
@synthesize delegate = _delegate;
#pragma mark - NSObject
- (id)init {
if ((self = [super init])) {
// Defaults
self.hidesBottomBarWhenPushed = YES;
_currentPageIndex = 0;
_performingLayout = NO; // Reset on view did appear
_rotating = NO;
_viewIsActive = NO;
_visiblePages = [NSMutableSet new];
_recycledPages = [NSMutableSet new];
_photos = [NSMutableArray new];
_initalPageIndex = 0;
_autoHide = YES;
_autoHideInterface = YES;
_displayDoneButton = YES;
_doneButtonImage = nil;
_displayToolbar = YES;
_displayActionButton = YES;
_displayArrowButton = YES;
_displayCounterLabel = NO;
_forceHideStatusBar = NO;
_usePopAnimation = NO;
_disableVerticalSwipe = NO;
_dismissOnTouch = NO;
_useWhiteBackgroundColor = NO;
_leftArrowImage = _rightArrowImage = _leftArrowSelectedImage = _rightArrowSelectedImage = nil;
_arrowButtonsChangePhotosAnimated = YES;
_backgroundScaleFactor = 1.0;
_animationDuration = 0.28;
_senderViewForAnimation = nil;
_scaleImage = nil;
_isdraggingPhoto = NO;
_statusBarHeight = 20.f;
_doneButtonRightInset = 20.f;
// relative to status bar and safeAreaInsets
_doneButtonTopInset = 10.f;
_doneButtonSize = CGSizeMake(55.f, 26.f);
if ([self respondsToSelector:@selector(automaticallyAdjustsScrollViewInsets)]) {
self.automaticallyAdjustsScrollViewInsets = NO;
}
_applicationWindow = [[[UIApplication sharedApplication] delegate] window];
self.modalPresentationStyle = UIModalPresentationCustom;
self.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;
self.modalPresentationCapturesStatusBarAppearance = YES;
self.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;
// Listen for IDMPhoto notifications
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(handleIDMPhotoLoadingDidEndNotification:)
name:IDMPhoto_LOADING_DID_END_NOTIFICATION
object:nil];
}
return self;
}
- (id)initWithPhotos:(NSArray *)photosArray {
if ((self = [self init])) {
_photos = [[NSMutableArray alloc] initWithArray:photosArray];
}
return self;
}
- (id)initWithPhotos:(NSArray *)photosArray animatedFromView:(UIView*)view {
if ((self = [self init])) {
_photos = [[NSMutableArray alloc] initWithArray:photosArray];
_senderViewForAnimation = view;
}
return self;
}
- (id)initWithPhotoURLs:(NSArray *)photoURLsArray {
if ((self = [self init])) {
NSArray *photosArray = [IDMPhoto photosWithURLs:photoURLsArray];
_photos = [[NSMutableArray alloc] initWithArray:photosArray];
}
return self;
}
- (id)initWithPhotoURLs:(NSArray *)photoURLsArray animatedFromView:(UIView*)view {
if ((self = [self init])) {
NSArray *photosArray = [IDMPhoto photosWithURLs:photoURLsArray];
_photos = [[NSMutableArray alloc] initWithArray:photosArray];
_senderViewForAnimation = view;
}
return self;
}
- (void)dealloc {
_pagingScrollView.delegate = nil;
[[NSNotificationCenter defaultCenter] removeObserver:self];
[self releaseAllUnderlyingPhotos];
}
- (void)releaseAllUnderlyingPhotos {
for (id p in _photos) { if (p != [NSNull null]) [p unloadUnderlyingImage]; } // Release photos
}
- (void)didReceiveMemoryWarning {
// Release any cached data, images, etc that aren't in use.
[self releaseAllUnderlyingPhotos];
[_recycledPages removeAllObjects];
// Releases the view if it doesn't have a superview.
[super didReceiveMemoryWarning];
}
#pragma mark - Pan Gesture
- (void)panGestureRecognized:(id)sender {
// Initial Setup
IDMZoomingScrollView *scrollView = [self pageDisplayedAtIndex:_currentPageIndex];
//IDMTapDetectingImageView *scrollView.photoImageView = scrollView.photoImageView;
static float firstX, firstY;
float viewHeight = scrollView.frame.size.height;
float viewHalfHeight = viewHeight/2;
CGPoint translatedPoint = [(UIPanGestureRecognizer*)sender translationInView:self.view];
// Gesture Began
if ([(UIPanGestureRecognizer*)sender state] == UIGestureRecognizerStateBegan) {
[self setControlsHidden:YES animated:YES permanent:YES];
firstX = [scrollView center].x;
firstY = [scrollView center].y;
_senderViewForAnimation.hidden = (_currentPageIndex == _initalPageIndex);
_isdraggingPhoto = YES;
[self setNeedsStatusBarAppearanceUpdate];
}
translatedPoint = CGPointMake(firstX, firstY+translatedPoint.y);
[scrollView setCenter:translatedPoint];
float newY = scrollView.center.y - viewHalfHeight;
float newAlpha = 1 - fabsf(newY)/viewHeight; //abs(newY)/viewHeight * 1.8;
self.view.opaque = YES;
self.view.backgroundColor = [UIColor colorWithWhite:(_useWhiteBackgroundColor ? 1 : 0) alpha:newAlpha];
// Gesture Ended
if ([(UIPanGestureRecognizer*)sender state] == UIGestureRecognizerStateEnded) {
if(scrollView.center.y > viewHalfHeight+40 || scrollView.center.y < viewHalfHeight-40) // Automatic Dismiss View
{
if (_senderViewForAnimation && _currentPageIndex == _initalPageIndex) {
[self performCloseAnimationWithScrollView:scrollView];
return;
}
CGFloat finalX = firstX, finalY;
CGFloat windowsHeigt = [_applicationWindow frame].size.height;
if(scrollView.center.y > viewHalfHeight+30) // swipe down
finalY = windowsHeigt*2;
else // swipe up
finalY = -viewHalfHeight;
CGFloat animationDuration = 0.35;
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:animationDuration];
[UIView setAnimationCurve:UIViewAnimationCurveEaseIn];
[UIView setAnimationDelegate:self];
[scrollView setCenter:CGPointMake(finalX, finalY)];
self.view.backgroundColor = [UIColor colorWithWhite:0 alpha:0];
[UIView commitAnimations];
[self performSelector:@selector(doneButtonPressed:) withObject:self afterDelay:animationDuration];
}
else // Continue Showing View
{
_isdraggingPhoto = NO;
[self setNeedsStatusBarAppearanceUpdate];
self.view.backgroundColor = [UIColor colorWithWhite:(_useWhiteBackgroundColor ? 1 : 0) alpha:1];
CGFloat velocityY = (.35*[(UIPanGestureRecognizer*)sender velocityInView:self.view].y);
CGFloat finalX = firstX;
CGFloat finalY = viewHalfHeight;
CGFloat animationDuration = (ABS(velocityY)*.0002)+.2;
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:animationDuration];
[UIView setAnimationCurve:UIViewAnimationCurveEaseOut];
[UIView setAnimationDelegate:self];
[scrollView setCenter:CGPointMake(finalX, finalY)];
[UIView commitAnimations];
}
}
}
#pragma mark - Animation
- (void)performPresentAnimation {
self.view.alpha = 0.0f;
_pagingScrollView.alpha = 0.0f;
UIImage *imageFromView = _scaleImage ? _scaleImage : [self getImageFromView:_senderViewForAnimation];
_senderViewOriginalFrame = [_senderViewForAnimation.superview convertRect:_senderViewForAnimation.frame toView:nil];
UIView *fadeView = [[UIView alloc] initWithFrame:_applicationWindow.bounds];
fadeView.backgroundColor = [UIColor clearColor];
[_applicationWindow addSubview:fadeView];
UIImageView *resizableImageView = [[UIImageView alloc] initWithImage:imageFromView];
resizableImageView.frame = _senderViewOriginalFrame;
resizableImageView.clipsToBounds = YES;
resizableImageView.contentMode = _senderViewForAnimation ? _senderViewForAnimation.contentMode : UIViewContentModeScaleAspectFill;
resizableImageView.backgroundColor = [UIColor clearColor];
if (@available(iOS 11.0, *)) {
resizableImageView.accessibilityIgnoresInvertColors = YES;
} else {
// Fallback on earlier versions
}
[_applicationWindow addSubview:resizableImageView];
_senderViewForAnimation.hidden = YES;
void (^completion)() = ^() {
self.view.alpha = 1.0f;
_pagingScrollView.alpha = 1.0f;
resizableImageView.backgroundColor = [UIColor colorWithWhite:(_useWhiteBackgroundColor) ? 1 : 0 alpha:1];
[fadeView removeFromSuperview];
[resizableImageView removeFromSuperview];
};
[UIView animateWithDuration:_animationDuration animations:^{
fadeView.backgroundColor = self.useWhiteBackgroundColor ? [UIColor whiteColor] : [UIColor blackColor];
} completion:nil];
CGRect finalImageViewFrame = [self animationFrameForImage:imageFromView presenting:YES scrollView:nil];
if(_usePopAnimation)
{
[self animateView:resizableImageView
toFrame:finalImageViewFrame
completion:completion];
}
else
{
[UIView animateWithDuration:_animationDuration animations:^{
resizableImageView.layer.frame = finalImageViewFrame;
} completion:^(BOOL finished) {
completion();
}];
}
}
- (void)performCloseAnimationWithScrollView:(IDMZoomingScrollView*)scrollView {
if ([_delegate respondsToSelector:@selector(willDisappearPhotoBrowser:)]) {
[_delegate willDisappearPhotoBrowser:self];
}
float fadeAlpha = 1 - fabs(scrollView.frame.origin.y)/scrollView.frame.size.height;
UIImage *imageFromView = [scrollView.photo underlyingImage];
if (!imageFromView && [scrollView.photo respondsToSelector:@selector(placeholderImage)]) {
imageFromView = [scrollView.photo placeholderImage];
}
UIView *fadeView = [[UIView alloc] initWithFrame:_applicationWindow.bounds];
fadeView.backgroundColor = self.useWhiteBackgroundColor ? [UIColor whiteColor] : [UIColor blackColor];
fadeView.alpha = fadeAlpha;
[_applicationWindow addSubview:fadeView];
CGRect imageViewFrame = [self animationFrameForImage:imageFromView presenting:NO scrollView:scrollView];
UIImageView *resizableImageView = [[UIImageView alloc] initWithImage:imageFromView];
resizableImageView.frame = imageViewFrame;
resizableImageView.contentMode = _senderViewForAnimation ? _senderViewForAnimation.contentMode : UIViewContentModeScaleAspectFill;
resizableImageView.backgroundColor = [UIColor clearColor];
resizableImageView.clipsToBounds = YES;
if (@available(iOS 11.0, *)) {
resizableImageView.accessibilityIgnoresInvertColors = YES;
} else {
// Fallback on earlier versions
}
[_applicationWindow addSubview:resizableImageView];
self.view.hidden = YES;
void (^completion)() = ^() {
_senderViewForAnimation.hidden = NO;
_senderViewForAnimation = nil;
_scaleImage = nil;
[fadeView removeFromSuperview];
[resizableImageView removeFromSuperview];
[self prepareForClosePhotoBrowser];
[self dismissPhotoBrowserAnimated:NO];
};
[UIView animateWithDuration:_animationDuration animations:^{
fadeView.alpha = 0;
self.view.backgroundColor = [UIColor clearColor];
} completion:nil];
CGRect senderViewOriginalFrame = _senderViewForAnimation.superview ? [_senderViewForAnimation.superview convertRect:_senderViewForAnimation.frame toView:nil] : _senderViewOriginalFrame;
if(_usePopAnimation)
{
[self animateView:resizableImageView
toFrame:senderViewOriginalFrame
completion:completion];
}
else
{
[UIView animateWithDuration:_animationDuration animations:^{
resizableImageView.layer.frame = senderViewOriginalFrame;
} completion:^(BOOL finished) {
completion();
}];
}
}
- (CGRect)animationFrameForImage:(UIImage *)image presenting:(BOOL)presenting scrollView:(UIScrollView *)scrollView
{
if (!image) {
return CGRectZero;
}
CGSize imageSize = image.size;
CGRect bounds = _applicationWindow.bounds;
// adjust bounds as the photo browser does
if (@available(iOS 11.0, *)) {
// use the windows safe area inset
UIWindow *window = [UIApplication sharedApplication].keyWindow;
UIEdgeInsets insets = UIEdgeInsetsMake(_statusBarHeight, 0, 0, 0);
if (window != NULL) {
insets = window.safeAreaInsets;
}
bounds = [self adjustForSafeArea:bounds adjustForStatusBar:NO forInsets:insets];
}
CGFloat maxWidth = CGRectGetWidth(bounds);
CGFloat maxHeight = CGRectGetHeight(bounds);
CGRect animationFrame = CGRectZero;
CGFloat aspect = imageSize.width / imageSize.height;
if (maxWidth / aspect <= maxHeight) {
animationFrame.size = CGSizeMake(maxWidth, maxWidth / aspect);
}
else {
animationFrame.size = CGSizeMake(maxHeight * aspect, maxHeight);
}
animationFrame.origin.x = roundf((maxWidth - animationFrame.size.width) / 2.0f);
animationFrame.origin.y = roundf((maxHeight - animationFrame.size.height) / 2.0f);
if (!presenting) {
animationFrame.origin.y += scrollView.frame.origin.y;
}
return animationFrame;
}
#pragma mark - Genaral
- (void)prepareForClosePhotoBrowser {
// Gesture
[_applicationWindow removeGestureRecognizer:_panGesture];
_autoHide = NO;
// Controls
[NSObject cancelPreviousPerformRequestsWithTarget:self]; // Cancel any pending toggles from taps
}
- (void)dismissPhotoBrowserAnimated:(BOOL)animated {
self.modalTransitionStyle = UIModalTransitionStyleCrossDissolve;
if ([_delegate respondsToSelector:@selector(photoBrowser:willDismissAtPageIndex:)])
[_delegate photoBrowser:self willDismissAtPageIndex:_currentPageIndex];
[self dismissViewControllerAnimated:animated completion:^{
if ([_delegate respondsToSelector:@selector(photoBrowser:didDismissAtPageIndex:)])
[_delegate photoBrowser:self didDismissAtPageIndex:_currentPageIndex];
// if (SYSTEM_VERSION_LESS_THAN(@"8.0"))
// {
// _applicationTopViewController.modalPresentationStyle = _previousModalPresentationStyle;
// }
}];
}
- (UIButton*)customToolbarButtonImage:(UIImage*)image imageSelected:(UIImage*)selectedImage action:(SEL)action {
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
[button setImage:image forState:UIControlStateNormal];
[button setImage:selectedImage forState:UIControlStateDisabled];
[button addTarget:self action:action forControlEvents:UIControlEventTouchUpInside];
[button setContentMode:UIViewContentModeCenter];
[button setFrame:[self getToolbarButtonFrame:image]];
return button;
}
- (CGRect)getToolbarButtonFrame:(UIImage *)image{
BOOL const isRetinaHd = ((float)[[UIScreen mainScreen] scale] > 2.0f);
float const defaultButtonSize = isRetinaHd ? 66.0f : 44.0f;
CGFloat buttonWidth = (image.size.width > defaultButtonSize) ? image.size.width : defaultButtonSize;
CGFloat buttonHeight = (image.size.height > defaultButtonSize) ? image.size.width : defaultButtonSize;
return CGRectMake(0,0, buttonWidth, buttonHeight);
}
- (UIImage*)getImageFromView:(UIView *)view {
UIGraphicsBeginImageContextWithOptions(view.bounds.size, YES, 2);
[view.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return image;
}
- (UIViewController *)topviewController
{
UIViewController *topviewController = [UIApplication sharedApplication].keyWindow.rootViewController;
while (topviewController.presentedViewController) {
topviewController = topviewController.presentedViewController;
}
return topviewController;
}
#pragma mark - View Lifecycle
- (void)viewDidLoad {
// View
self.view.backgroundColor = [UIColor colorWithWhite:(_useWhiteBackgroundColor ? 1 : 0) alpha:1];
self.view.clipsToBounds = YES;
// Setup paging scrolling view
CGRect pagingScrollViewFrame = [self frameForPagingScrollView];
_pagingScrollView = [[UIScrollView alloc] initWithFrame:pagingScrollViewFrame];
//_pagingScrollView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
_pagingScrollView.pagingEnabled = YES;
_pagingScrollView.delegate = self;
_pagingScrollView.showsHorizontalScrollIndicator = NO;
_pagingScrollView.showsVerticalScrollIndicator = NO;
_pagingScrollView.backgroundColor = [UIColor clearColor];
_pagingScrollView.contentSize = [self contentSizeForPagingScrollView];
[self.view addSubview:_pagingScrollView];
// Transition animation
[self performPresentAnimation];
UIInterfaceOrientation currentOrientation = [UIApplication sharedApplication].statusBarOrientation;
// Toolbar
_toolbar = [[UIToolbar alloc] initWithFrame:[self frameForToolbarAtOrientation:currentOrientation]];
_toolbar.backgroundColor = [UIColor clearColor];
_toolbar.clipsToBounds = YES;
_toolbar.translucent = YES;
[_toolbar setBackgroundImage:[UIImage new]
forToolbarPosition:UIToolbarPositionAny
barMetrics:UIBarMetricsDefault];
// Close Button
_doneButton = [UIButton buttonWithType:UIButtonTypeCustom];
[_doneButton setFrame:[self frameForDoneButtonAtOrientation:currentOrientation]];
[_doneButton setAlpha:1.0f];
[_doneButton addTarget:self action:@selector(doneButtonPressed:) forControlEvents:UIControlEventTouchUpInside];
if(!_doneButtonImage) {
[_doneButton setTitleColor:[UIColor colorWithWhite:0.9 alpha:0.9] forState:UIControlStateNormal|UIControlStateHighlighted];
[_doneButton setTitle:IDMPhotoBrowserLocalizedStrings(@"Done") forState:UIControlStateNormal];
[_doneButton.titleLabel setFont:[UIFont boldSystemFontOfSize:11.0f]];
[_doneButton setBackgroundColor:[UIColor colorWithWhite:0.1 alpha:0.5]];
_doneButton.layer.cornerRadius = 3.0f;
_doneButton.layer.borderColor = [UIColor colorWithWhite:0.9 alpha:0.9].CGColor;
_doneButton.layer.borderWidth = 1.0f;
_doneButtonSize = _doneButton.frame.size;
}
else {
[_doneButton setImage:_doneButtonImage forState:UIControlStateNormal];
_doneButton.contentMode = UIViewContentModeScaleAspectFit;
}
UIImage *leftButtonImage = (_leftArrowImage == nil) ?
[UIImage imageNamed:@"IDMPhotoBrowser.bundle/images/IDMPhotoBrowser_arrowLeft.png"] : _leftArrowImage;
UIImage *rightButtonImage = (_rightArrowImage == nil) ?
[UIImage imageNamed:@"IDMPhotoBrowser.bundle/images/IDMPhotoBrowser_arrowRight.png"] : _rightArrowImage;
UIImage *leftButtonSelectedImage = (_leftArrowSelectedImage == nil) ?
[UIImage imageNamed:@"IDMPhotoBrowser.bundle/images/IDMPhotoBrowser_arrowLeftSelected.png"] : _leftArrowSelectedImage;
UIImage *rightButtonSelectedImage = (_rightArrowSelectedImage == nil) ?
[UIImage imageNamed:@"IDMPhotoBrowser.bundle/images/IDMPhotoBrowser_arrowRightSelected.png"] : _rightArrowSelectedImage;
// Arrows
_previousButton = [[UIBarButtonItem alloc] initWithCustomView:[self customToolbarButtonImage:leftButtonImage
imageSelected:leftButtonSelectedImage
action:@selector(gotoPreviousPage)]];
_nextButton = [[UIBarButtonItem alloc] initWithCustomView:[self customToolbarButtonImage:rightButtonImage
imageSelected:rightButtonSelectedImage
action:@selector(gotoNextPage)]];
// Counter Label
_counterLabel = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 95, 40)];
_counterLabel.textAlignment = NSTextAlignmentCenter;
_counterLabel.backgroundColor = [UIColor clearColor];
_counterLabel.font = [UIFont fontWithName:@"Helvetica" size:17];
if(_useWhiteBackgroundColor == NO) {
_counterLabel.textColor = [UIColor whiteColor];
_counterLabel.shadowColor = [UIColor darkTextColor];
_counterLabel.shadowOffset = CGSizeMake(0, 1);
}
else {
_counterLabel.textColor = [UIColor blackColor];
}
// Counter Button
_counterButton = [[UIBarButtonItem alloc] initWithCustomView:_counterLabel];
// Action Button
if(_actionButtonImage != nil && _actionButtonSelectedImage != nil) {
_actionButton = [[UIBarButtonItem alloc] initWithCustomView:[self customToolbarButtonImage:_actionButtonImage
imageSelected:_actionButtonSelectedImage
action:@selector(actionButtonPressed:)]];
}
else {
_actionButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAction
target:self
action:@selector(actionButtonPressed:)];
}
// Gesture
_panGesture = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(panGestureRecognized:)];
[_panGesture setMinimumNumberOfTouches:1];
[_panGesture setMaximumNumberOfTouches:1];
// Update
//[self reloadData];
// Super
[super viewDidLoad];
}
- (void)viewWillAppear:(BOOL)animated {
// Update
[self reloadData];
if ([_delegate respondsToSelector:@selector(willAppearPhotoBrowser:)]) {
[_delegate willAppearPhotoBrowser:self];
}
// Super
[super viewWillAppear:animated];
// Status Bar
_statusBarOriginallyHidden = [UIApplication sharedApplication].statusBarHidden;
// Update UI
[self hideControlsAfterDelay];
}
- (void)viewDidAppear:(BOOL)animated {
[super viewDidAppear:animated];
_viewIsActive = YES;
}
// Release any retained subviews of the main view.
- (void)viewDidUnload {
_currentPageIndex = 0;
_pagingScrollView = nil;
_visiblePages = nil;
_recycledPages = nil;
_toolbar = nil;
_doneButton = nil;
_previousButton = nil;
_nextButton = nil;
[super viewDidUnload];
}
#pragma mark - Status Bar
- (UIStatusBarStyle)preferredStatusBarStyle {
return _useWhiteBackgroundColor ? UIStatusBarStyleDefault : UIStatusBarStyleLightContent;
}
- (BOOL)prefersStatusBarHidden {
if(_forceHideStatusBar) {
return YES;
}
if(_isdraggingPhoto) {
if(_statusBarOriginallyHidden) {
return YES;
}
else {
return NO;
}
}
else {
return [self areControlsHidden];
}
}
- (UIStatusBarAnimation)preferredStatusBarUpdateAnimation {
return UIStatusBarAnimationFade;
}
#pragma mark - Layout
- (void)viewWillLayoutSubviews {
// Flag
_performingLayout = YES;
UIInterfaceOrientation currentOrientation = [UIApplication sharedApplication].statusBarOrientation;
// Toolbar
_toolbar.frame = [self frameForToolbarAtOrientation:currentOrientation];
// Done button
_doneButton.frame = [self frameForDoneButtonAtOrientation:currentOrientation];
// Remember index
NSUInteger indexPriorToLayout = _currentPageIndex;
// Get paging scroll view frame to determine if anything needs changing
CGRect pagingScrollViewFrame = [self frameForPagingScrollView];
// Frame needs changing
_pagingScrollView.frame = pagingScrollViewFrame;
// Recalculate contentSize based on current orientation
_pagingScrollView.contentSize = [self contentSizeForPagingScrollView];
// Adjust frames and configuration of each visible page
for (IDMZoomingScrollView *page in _visiblePages) {
NSUInteger index = PAGE_INDEX(page);
page.frame = [self frameForPageAtIndex:index];
page.captionView.frame = [self frameForCaptionView:page.captionView atIndex:index];
[page setMaxMinZoomScalesForCurrentBounds];
}
// Adjust contentOffset to preserve page location based on values collected prior to location
_pagingScrollView.contentOffset = [self contentOffsetForPageAtIndex:indexPriorToLayout];
[self didStartViewingPageAtIndex:_currentPageIndex]; // initial
// Reset
_currentPageIndex = indexPriorToLayout;
_performingLayout = NO;
// Super
[super viewWillLayoutSubviews];
}
- (void)performLayout {
// Setup
_performingLayout = YES;
NSUInteger numberOfPhotos = [self numberOfPhotos];
// Setup pages
[_visiblePages removeAllObjects];
[_recycledPages removeAllObjects];
// Toolbar
if (_displayToolbar) {
[self.view addSubview:_toolbar];
} else {
[_toolbar removeFromSuperview];
}
// Close button
if(_displayDoneButton && !self.navigationController.navigationBar)
[self.view addSubview:_doneButton];
// Toolbar items & navigation
UIBarButtonItem *fixedLeftSpace = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace
target:self action:nil];
fixedLeftSpace.width = 32; // To balance action button
UIBarButtonItem *flexSpace = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace
target:self action:nil];
NSMutableArray *items = [NSMutableArray new];
if (_displayActionButton)
[items addObject:fixedLeftSpace];
[items addObject:flexSpace];
if (numberOfPhotos > 1 && _displayArrowButton)
[items addObject:_previousButton];
if(_displayCounterLabel) {
[items addObject:flexSpace];
[items addObject:_counterButton];
}
[items addObject:flexSpace];
if (numberOfPhotos > 1 && _displayArrowButton)
[items addObject:_nextButton];
[items addObject:flexSpace];
if(_displayActionButton)
[items addObject:_actionButton];
[_toolbar setItems:items];
[self updateToolbar];
// Content offset
_pagingScrollView.contentOffset = [self contentOffsetForPageAtIndex:_currentPageIndex];
[self tilePages];
_performingLayout = NO;
if(! _disableVerticalSwipe) {
[self.view addGestureRecognizer:_panGesture];
}
}
#pragma mark - Data
- (void)reloadData {
// Get data
[self releaseAllUnderlyingPhotos];
// Update
[self performLayout];
// Layout
[self.view setNeedsLayout];
}
- (NSUInteger)numberOfPhotos {
return _photos.count;
}
- (id<IDMPhoto>)photoAtIndex:(NSUInteger)index {
return _photos[index];
}
- (IDMCaptionView *)captionViewForPhotoAtIndex:(NSUInteger)index {
IDMCaptionView *captionView = nil;
if ([_delegate respondsToSelector:@selector(photoBrowser:captionViewForPhotoAtIndex:)]) {
captionView = [_delegate photoBrowser:self captionViewForPhotoAtIndex:index];
} else {
id <IDMPhoto> photo = [self photoAtIndex:index];
if ([photo respondsToSelector:@selector(caption)]) {
if ([photo caption]) captionView = [[IDMCaptionView alloc] initWithPhoto:photo];
}
}
captionView.alpha = [self areControlsHidden] ? 0 : 1; // Initial alpha
return captionView;
}
- (UIImage *)imageForPhoto:(id<IDMPhoto>)photo {
if (photo) {
// Get image or obtain in background
if ([photo underlyingImage]) {
return [photo underlyingImage];
} else {
[photo loadUnderlyingImageAndNotify];
if ([photo respondsToSelector:@selector(placeholderImage)]) {
return [photo placeholderImage];
}
}
}
return nil;
}
- (void)loadAdjacentPhotosIfNecessary:(id<IDMPhoto>)photo {
IDMZoomingScrollView *page = [self pageDisplayingPhoto:photo];
if (page) {
// If page is current page then initiate loading of previous and next pages
NSUInteger pageIndex = PAGE_INDEX(page);
if (_currentPageIndex == pageIndex) {
if (pageIndex > 0) {
// Preload index - 1
id <IDMPhoto> photo = [self photoAtIndex:pageIndex-1];
if (![photo underlyingImage]) {
[photo loadUnderlyingImageAndNotify];
IDMLog(@"Pre-loading image at index %i", pageIndex-1);
}
}
if (pageIndex < [self numberOfPhotos] - 1) {
// Preload index + 1
id <IDMPhoto> photo = [self photoAtIndex:pageIndex+1];
if (![photo underlyingImage]) {
[photo loadUnderlyingImageAndNotify];
IDMLog(@"Pre-loading image at index %i", pageIndex+1);
}
}
}
}
}
#pragma mark - IDMPhoto Loading Notification
- (void)handleIDMPhotoLoadingDidEndNotification:(NSNotification *)notification {
id <IDMPhoto> photo = [notification object];
IDMZoomingScrollView *page = [self pageDisplayingPhoto:photo];
if (page) {
if ([photo underlyingImage]) {
// Successful load
[page displayImage];
[self loadAdjacentPhotosIfNecessary:photo];
} else {
// Failed to load
[page displayImageFailure];
if ([_delegate respondsToSelector:@selector(photoBrowser:imageFailed:imageView:)]) {
NSUInteger pageIndex = PAGE_INDEX(page);
[_delegate photoBrowser:self imageFailed:pageIndex imageView:page.photoImageView];
}
// make sure the page is completely updated
[page setNeedsLayout];
}
}
}
#pragma mark - Paging
- (void)tilePages {
// Calculate which pages should be visible
// Ignore padding as paging bounces encroach on that
// and lead to false page loads
CGRect visibleBounds = _pagingScrollView.bounds;
NSInteger iFirstIndex = (NSInteger) floorf((CGRectGetMinX(visibleBounds)+PADDING*2) / CGRectGetWidth(visibleBounds));
NSInteger iLastIndex = (NSInteger) floorf((CGRectGetMaxX(visibleBounds)-PADDING*2-1) / CGRectGetWidth(visibleBounds));
if (iFirstIndex < 0) iFirstIndex = 0;
if (iFirstIndex > [self numberOfPhotos] - 1) iFirstIndex = [self numberOfPhotos] - 1;
if (iLastIndex < 0) iLastIndex = 0;
if (iLastIndex > [self numberOfPhotos] - 1) iLastIndex = [self numberOfPhotos] - 1;