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NAMapView.m
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NAMapView.m
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//
// NAMapView.h
// NAMapKit
//
// Created by Neil Ang on 21/07/10.
// Copyright 2010 neilang.com. All rights reserved.
//
#import "NAMapView.h"
#import "NAPinAnnotationView.h"
#import "NACallOutView.h"
#define NA_PIN_ANIMATION_DURATION 0.5f
#define NA_CALLOUT_ANIMATION_DURATION 0.1f
#define NA_ZOOM_STEP 1.5
@interface NAMapView()
@property (nonatomic, strong) UIImageView *imageView;
@property (nonatomic, strong) NACallOutView *calloutView;
@property (nonatomic, strong) NSMutableArray *annotationViews;
@property (nonatomic, assign) CGSize orignalSize;
-(void)addAnimatedAnnontation:(NAAnnotation *)annontation;
-(IBAction)showCallOut:(id)sender;
-(void)hideCallOut;
-(void)handleDoubleTap:(UIGestureRecognizer *)gestureRecognizer;
-(void)handleTwoFingerTap:(UIGestureRecognizer *)gestureRecognizer;
-(void)viewSetup;
@end
@implementation NAMapView
@synthesize imageView = _imageView;
@synthesize orignalSize = _orignalSize;
@synthesize calloutView = _calloutView;
@synthesize annotationViews = _annotationViews;
-(void)viewSetup{
self.delegate = self;
UITapGestureRecognizer *doubleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleDoubleTap:)];
UITapGestureRecognizer *twoFingerTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleTwoFingerTap:)];
[doubleTap setNumberOfTapsRequired:2];
[twoFingerTap setNumberOfTouchesRequired:2];
[self addGestureRecognizer:doubleTap];
[self addGestureRecognizer:twoFingerTap];
self.imageView = [[UIImageView alloc] initWithFrame:CGRectZero];
[self addSubview:self.imageView];
self.calloutView = [[NACallOutView alloc] initOnMapView:self];
[self addObserver:self.calloutView forKeyPath:@"contentSize" options:NSKeyValueObservingOptionNew context:nil];
[self addSubview:self.calloutView];
}
- (void)awakeFromNib {
[super awakeFromNib];
[self viewSetup];
}
- (id)initWithFrame:(CGRect)frame {
self = [super initWithFrame:frame];
if (self) {
[self viewSetup];
}
return self;
}
- (void)displayMap:(UIImage *)map{
self.imageView.frame = CGRectMake(0.0f, 0.0f, map.size.width, map.size.height);
self.imageView.image = map;
CGRect imageFrame = self.imageView.frame;
self.orignalSize = CGSizeMake(CGRectGetWidth(imageFrame), CGRectGetHeight(imageFrame));
self.contentSize = self.orignalSize;
}
-(void)addAnimatedAnnontation:(NAAnnotation *)annontation {
[self addAnnotation:annontation animated:YES];
}
- (void)addAnnotation:(NAAnnotation *)annotation animated:(BOOL)animate {
NAPinAnnotationView *annontationView = [[NAPinAnnotationView alloc] initWithAnnotation:annotation onMapView:self];
[annontationView addTarget:self action:@selector(showCallOut:) forControlEvents:UIControlEventTouchDown];
[self addObserver:annontationView forKeyPath:@"contentSize" options:NSKeyValueObservingOptionNew context:nil];
if(animate){
annontationView.transform = CGAffineTransformTranslate(CGAffineTransformIdentity, 0.0f, -annontationView.center.y);
}
[self addSubview:annontationView];
if(animate){
annontationView.animating = YES;
[UIView animateWithDuration:NA_PIN_ANIMATION_DURATION animations:^{
annontationView.transform = CGAffineTransformIdentity;
}
completion:^ (BOOL finished) {
annontationView.animating = NO;
}];
}
if(!self.annotationViews){
self.annotationViews = [[NSMutableArray alloc] init];
}
[self.annotationViews addObject:annontationView];
[self bringSubviewToFront:self.calloutView];
}
- (void)addAnnotations:(NSArray *)annotations animated:(BOOL)animate {
int i = 0;
for (NAAnnotation *annotation in annotations) {
if(animate){
[self performSelector:@selector(addAnimatedAnnontation:) withObject:annotation afterDelay:(NA_PIN_ANIMATION_DURATION * (i++ / 2.0f))];
}
else{
[self addAnnotation:annotation animated:NO];
}
}
}
-(void)removeAnnotation:(NAAnnotation *)annotation{
for(NAPinAnnotationView *annotationView in self.annotationViews){
if (annotationView.annotation == annotation) {
[annotationView removeFromSuperview];
[self removeObserver:annotationView forKeyPath:@"contentSize"];
[self.annotationViews removeObject:annotationView];
break;
}
}
}
- (IBAction)showCallOut:(id)sender {
if(![sender isKindOfClass:[NAPinAnnotationView class]]) return;
NAPinAnnotationView *annontationView = (NAPinAnnotationView *)sender;
NAAnnotation *annotation = annontationView.annotation;
if(!annotation || !annotation.title) return;
[self hideCallOut];
[self.calloutView setAnnotation:annotation];
[self centreOnPoint:annotation.point animated:YES];
self.calloutView.transform = CGAffineTransformScale(CGAffineTransformIdentity, 0.4f, 0.4f);
self.calloutView.hidden = NO;
[UIView animateWithDuration:NA_CALLOUT_ANIMATION_DURATION animations:^{
self.calloutView.transform = CGAffineTransformIdentity;
}];
}
- (void)centreOnPoint:(CGPoint)point animated:(BOOL)animate {
float x = (point.x * self.zoomScale) - (self.frame.size.width / 2.0f);
float y = (point.y * self.zoomScale) - (self.frame.size.height / 2.0f);
[self setContentOffset:CGPointMake(round(x), round(y)) animated:animate];
}
- (void)hideCallOut {
self.calloutView.hidden = YES;
}
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
if (!self.dragging) {
[self hideCallOut];
}
[super touchesEnded:touches withEvent:event];
}
-(CGPoint)zoomRelativePoint:(CGPoint)point{
float x = (self.contentSize.width / self.orignalSize.width) * point.x;
float y = (self.contentSize.height / self.orignalSize.height) * point.y;
return CGPointMake(round(x), round(y));
}
- (void)dealloc {
for(NAPinAnnotationView *annotationView in self.annotationViews){
[self removeObserver:annotationView forKeyPath:@"contentSize"];
}
if(self.calloutView){
[self removeObserver:self.calloutView forKeyPath:@"contentSize"];
}
}
#pragma mark - UIScrollViewDelegate
- (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView {
return self.imageView;
}
#pragma mark - Tap to Zoom
- (void)handleDoubleTap:(UIGestureRecognizer *)gestureRecognizer {
// double tap zooms in, but returns to normal zoom level if it reaches max zoom
float newScale = self.zoomScale >= self.maximumZoomScale ? self.minimumZoomScale : self.zoomScale * NA_ZOOM_STEP;
[self setZoomScale:newScale animated:YES];
}
- (void)handleTwoFingerTap:(UIGestureRecognizer *)gestureRecognizer {
// two-finger tap zooms out, but returns to normal zoom level if it reaches min zoom
float newScale = self.zoomScale <= self.minimumZoomScale ? self.maximumZoomScale : self.zoomScale / NA_ZOOM_STEP;
[self setZoomScale:newScale animated:YES];
}
@end
#undef NA_PIN_ANIMATION_DURATION
#undef NA_CALLOUT_ANIMATION_DURATION
#undef NA_ZOOM_STEP