iOS-OC之相册，可以放大，不能循环查看

#import "ViewController.h"
#define kuan [UIScreen mainScreen].bounds.size.width#define gao [UIScreen mainScreen].bounds.size.height@interface ViewController ()<UIScrollViewDelegate>@property (weak, nonatomic) IBOutlet UIScrollView *huaKuang;
@end
@implementation ViewController
- (void)viewDidLoad { [super viewDidLoad]; //设置contentSize _huaKuang.contentSize=CGSizeMake((kuan)*4, gao); _huaKuang.backgroundColor=[UIColor blackColor]; //设置分页 _huaKuang.pagingEnabled=YES; //隐藏滚动条 //滚动时是否显示水平滚动条 _huaKuang.showsHorizontalScrollIndicator=NO; //滚动时是否显示垂直滚动条 _huaKuang.showsVerticalScrollIndicator=NO; //设置代理,需要遵循代理协议<UIScrollViewDelegate>，写在@interface ViewController ()的后面 _huaKuang.delegate=self; //添加子视图，因为是多个所以写了一个方法来实现添加 [self tianJianZiShiTu];}-(void)tianJianZiShiTu{ //假如有六个图片，就要创建六个UIScrollView和六个UIImageView,并且找到六个图片 for(int i=0;i<3;i++) { //创建UIScrollView //为了区分开不同的照片加一个20黑边，需要设置ScrollViewscroll View中的Left和View中的Width UIScrollView *uisv=[[UIScrollView alloc] initWithFrame:CGRectMake((kuan+20)*i, 0, kuan, gao)]; //把创建完成的添加到总的那个UIScrollView上 [_huaKuang addSubview:uisv]; //创建UIImageView UIImageView *uiiv=[[UIImageView alloc] initWithFrame:CGRectMake(0, 0, kuan, gao)]; //把创建的UIImageView添加到UIScrollView中 [uisv addSubview:uiiv]; //设置UIImageView的图片 NSString *imageName = [NSString stringWithFormat:@"new_feature_%d",i + 1]; uiiv.image=[UIImage imageNamed:imageName]; //设置tag值 uiiv.tag=1000; //设置UIScrollView的代理 uisv.delegate=self; //设置缩放范围 uisv.minimumZoomScale=0.5; uisv.maximumZoomScale=1.5; //定义点击事件 UITapGestureRecognizer *tap=[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(dianJiShiJian:)]; //设置有效点击数(就是双击) tap.numberOfTapsRequired=2; //添加到UIScrollView中 [uisv addGestureRecognizer:tap]; }}-(void)dianJiShiJian:(UITapGestureRecognizer *)tap{ //获取点击事件的view UIScrollView *uisv1=(UIScrollView *)tap.view; if(uisv1.zoomScale!=1.0) { [uisv1 setZoomScale:1.0 animated:YES]; return ; } CGPoint location=[tap locationInView:tap.view]; CGRect rect=CGRectMake(location.x-100, location.y-100, 200, 200); [uisv1 zoomToRect:rect animated:YES];}//指定缩放的视图-(UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView{ if (scrollView == _huaKuang) { return nil; } UIImageView *imageView = (UIImageView *)[scrollView viewWithTag:1000]; return imageView;}
//滚动结束，把所有的缩放视图的缩放比例置为1.0-(void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView{ if (scrollView == _huaKuang) { for (id obj in _huaKuang.subviews) { if ([obj isKindOfClass:[UIScrollView class]]) { UIScrollView *scaleSC = (UIScrollView *)obj; scaleSC.zoomScale = 1.0; } } }}- (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning];}
@end