首页 > 代码库 > scrollview里面多张图片，每张都能放大缩小
scrollview里面多张图片，每张都能放大缩小
#import "urltestViewController.h"
@interface urltestViewController ()
@end
@implementation urltestViewController
- (void)viewDidLoad
{
[superviewDidLoad];
self.view.backgroundColor = [UIColorwhiteColor];
NSArray *array = [NSArrayarrayWithObjects:@"111.png",@"222.png",@"333.png",nil];
self.imageScrollView = [[UIScrollViewalloc]initWithFrame:CGRectMake(0,0,320,568)];
self.imageScrollView.backgroundColor = [UIColorclearColor];
self.imageScrollView.scrollEnabled =YES;
self.imageScrollView.pagingEnabled =YES;
self.imageScrollView.delegate =self;
self.imageScrollView.contentSize =CGSizeMake(array.count*320,568);
for (int i =0; i <3; i++){
UITapGestureRecognizer *doubleTap =[[UITapGestureRecognizeralloc]initWithTarget:selfaction:@selector(handleDoubleTap:)];
[doubleTap setNumberOfTapsRequired:2];
UIScrollView *s = [[UIScrollViewalloc]initWithFrame:CGRectMake(320*i,0,320,568)];
s.backgroundColor = [UIColorclearColor];
s.contentSize =CGSizeMake(320,568);
s.delegate =self;
s.minimumZoomScale =0.5;
s.maximumZoomScale =3.0;
// s.tag = i+1;
[ssetZoomScale:1.0];
UIImageView *imageview = [[UIImageViewalloc]initWithFrame:CGRectMake(0,0,320,568)];
NSString *imageName = [arrayobjectAtIndex:i];
imageview.image = [UIImageimageNamed:imageName];
imageview.userInteractionEnabled =YES;
imageview.tag = i+1;
[imageviewaddGestureRecognizer:doubleTap];
[saddSubview:imageview];
[self.imageScrollViewaddSubview:s];
}
// self.imageScrollView.contentOffset = CGPointMake(320, 0);
[self.viewaddSubview:self.imageScrollView];
}
#pragma mark - ScrollView delegate
-(UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView{
for (UIView *vin scrollView.subviews){
return v;
}
return nil;
}
- (void)viewDidUnload
{
[superviewDidUnload];
// 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)
{
returnYES;
}
return NO;
}
-(void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView{
if (scrollView ==self.imageScrollView){
CGFloat x = scrollView.contentOffset.x;
if (x==-333){
}
else {
// offset = x;
for (UIScrollView *sin scrollView.subviews){
if ([sisKindOfClass:[UIScrollViewclass]]){
[s setZoomScale:1.0]; //scrollView每滑动一次将要出现的图片较正常时候图片的倍数（将要出现的图片显示的倍数）
}
}
}
}
}
#pragma mark -
-(void)handleDoubleTap:(UIGestureRecognizer *)gesture{
float newScale = [(UIScrollView*)gesture.view.superviewzoomScale] * 1.5;//每次双击放大倍数
CGRect zoomRect = [selfzoomRectForScale:newScalewithCenter:[gesturelocationInView:gesture.view]];
[(UIScrollView*)gesture.view.superviewzoomToRect:zoomRectanimated:YES];
}
- (CGRect)zoomRectForScale:(float)scale withCenter:(CGPoint)center
{
CGRect zoomRect;
zoomRect.size.height =self.view.frame.size.height / scale;
zoomRect.size.width =self.view.frame.size.width / scale;
zoomRect.origin.x = center.x - (zoomRect.size.width /2.0);
zoomRect.origin.y = center.y - (zoomRect.size.height /2.0);
return zoomRect;
}
- (void)didReceiveMemoryWarning
{
[superdidReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end
scrollview里面多张图片，每张都能放大缩小