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Scrollview example with proper inset treatment
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| Original file line number | Diff line number | Diff line change |
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| #import <Foundation/Foundation.h> | ||
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| // | ||
| // This controller demonstrates how to use SMCalloutView with a basic UIScrollView. | ||
| // | ||
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| @interface ScrollViewController : UIViewController | ||
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| @end |
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| #import "ScrollViewController.h" | ||
| #import <MapKit/MapKit.h> | ||
| #import "SMCalloutView.h" | ||
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| @interface ScrollViewController () <UIGestureRecognizerDelegate, SMCalloutViewDelegate> | ||
| @property (nonatomic, strong) UIScrollView *scrollView; | ||
| @property (nonatomic, strong) UIImageView *marsView; | ||
| @property (nonatomic, strong) MKPinAnnotationView *pinView; | ||
| @property (nonatomic, strong) SMCalloutView *calloutView; | ||
| @end | ||
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| @implementation ScrollViewController | ||
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| - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil { | ||
| if (self = [super initWithNibName:nil bundle:nil]) { | ||
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| self.title = @"ScrollView"; | ||
| } | ||
| return self; | ||
| } | ||
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| - (void)loadView { | ||
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| self.marsView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"mars.jpg"]]; | ||
| self.marsView.userInteractionEnabled = YES; | ||
| [self.marsView addGestureRecognizer:[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(marsTapped)]]; | ||
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| self.scrollView = [UIScrollView new]; | ||
| self.scrollView.contentSize = self.marsView.image.size; | ||
| self.scrollView.contentOffset = CGPointMake(40, 40); | ||
| self.scrollView.bounces = NO; | ||
| [self.scrollView addSubview:self.marsView]; | ||
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| self.pinView = [[MKPinAnnotationView alloc] initWithAnnotation:nil reuseIdentifier:@""]; | ||
| self.pinView.center = CGPointMake(230, 200); | ||
| [self.pinView addGestureRecognizer:[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(pinTapped)]]; | ||
| [self.marsView addSubview:self.pinView]; | ||
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| self.calloutView = [SMCalloutView new]; | ||
| self.calloutView.delegate = self; | ||
| self.calloutView.title = @"Curiosity"; | ||
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| self.view = self.scrollView; | ||
| } | ||
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| - (void)pinTapped { | ||
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| // Apply the MKAnnotationView's desired calloutOffset (from the top-middle of the view) | ||
| self.calloutView.calloutOffset = self.pinView.calloutOffset; | ||
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| // Apply any scroll view edge insets | ||
| self.calloutView.constrainedInsets = self.scrollView.contentInset; | ||
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| // This does all the magic. | ||
| [self.calloutView presentCalloutFromRect:self.pinView.bounds inView:self.pinView constrainedToView:self.view animated:YES]; | ||
| } | ||
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| - (NSTimeInterval)calloutView:(SMCalloutView *)calloutView delayForRepositionWithSize:(CGSize)offset { | ||
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| // the callout is telling us we need to move the scroll view such that the callout will be completely visible when it appears. | ||
| CGPoint contentOffset = self.scrollView.contentOffset; | ||
| contentOffset.x -= offset.width; | ||
| contentOffset.y -= offset.height; | ||
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| [self.scrollView setContentOffset:contentOffset animated:YES]; | ||
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| return kSMCalloutViewRepositionDelayForUIScrollView; | ||
| } | ||
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| - (void)marsTapped { | ||
| [self.calloutView dismissCalloutAnimated:YES]; | ||
| } | ||
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| @end |
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