http://blog.sina.com.cn/s/blog_5d68044001018s1n.html
scrollview里面多张图片，每张都能放大缩小
- (void)viewDidLoad
{
[super viewDidLoad];
self.view.backgroundColor = [UIColor whiteColor];
UITapGestureRecognizer *doubleTap =[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleDoubleTap:)];
[doubleTap setNumberOfTapsRequired:2];
self.imageScrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, 768, 980)];
self.imageScrollView.backgroundColor = [UIColor clearColor];
self.imageScrollView.scrollEnabled = YES;
self.imageScrollView.pagingEnabled = YES;
self.imageScrollView.delegate = self;
self.imageScrollView.contentSize = CGSizeMake(768*array.count, 980);
for (int i = 0; i
UITapGestureRecognizer *doubleTap =[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleDoubleTap:)];
[doubleTap setNumberOfTapsRequired:2];
UIScrollView *s = [[UIScrollView alloc] initWithFrame:CGRectMake(768*i, 0, 768, 980)];
s.backgroundColor = [UIColor clearColor];
s.contentSize = CGSizeMake(768, 980);
s.delegate = self;
s.minimumZoomScale = 1.0;
s.maximumZoomScale = 3.0;
// s.tag = i+1;
[s setZoomScale:1.0];
UIImageView *imageview = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 768, 980)];
NSString *imageName = [array objectAtIndex:i];
imageview.image = [UIImage imageNamed:imageName];
imageview.userInteractionEnabled = YES;
imageview.tag = i+1;
[imageview addGestureRecognizer:doubleTap];
[s addSubview:imageview];
[self.imageScrollView addSubview:s];
[doubleTap release];
[imageview release];
[s release];
}
[self.view addSubview:self.imageScrollView];
}
#pragma mark - ScrollView delegate
-(UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView{
for (UIView *v in scrollView.subviews){
return v;
}
return nil;
}
- (void)viewDidUnload
{
[super viewDidUnload];
// Release any retained subviews of the main view.
imageScrollView=nil;
//nameArray =nil;
}
- (void)dealloc
{
[imageScrollView release];
// [nameArray release];
[super dealloc];
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
if(interfaceOrientation ==UIInterfaceOrientationPortrait||interfaceOrientation ==UIInterfaceOrientationPortraitUpsideDown)
{
return YES;
}
return NO;
}
-(void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView{
if (scrollView == self.imageScrollView){
CGFloat x = scrollView.contentOffset.x;
if (x==offset){
}
else {
offset = x;
for (UIScrollView *s in scrollView.subviews){
if ([s isKindOfClass:[UIScrollView class]]){
[s setZoomScale:1.0];
}
}
}
}
}
//- (void)scrollViewDidEndZooming:(UIScrollView *)scrollView withView:(UIView *)view atScale:(float)scale {
// [scrollView setZoomScale:scale+1.0 animated:YES];
// [scrollView setZoomScale:scale animated:YES];
//}
#pragma mark -
-(void)handleDoubleTap:(UIGestureRecognizer *)gesture{
float newScale = [(UIScrollView*)gesture.view.superview zoomScale] * 1.5;
CGRect zoomRect = [self zoomRectForScale:newScale inView:(UIScrollView*)gesture.view.superview withCenter:[gesture locationInView:gesture.view]];
[(UIScrollView*)gesture.view.superview zoomToRect:zoomRect animated:YES];
}