#import "ViewController.h"

@interface ViewController () <UIScrollViewDelegate>

@property (weak, nonatomic) IBOutlet UIScrollView *scrollView;

@property (weak, nonatomic) IBOutlet UIImageView *mView;

@end

@implementation ViewController

- (void)viewDidLoad {

    [super viewDidLoad];

    //1.设置内容尺寸

    self.scrollView.contentSize=self.mView.frame.size;

    //2.设置代理

    self.scrollView.delegate=self;

    //3.设置最大和最小的缩放比例  －－设置之后才会有缩放效果

    self.scrollView.maximumZoomScale=2.0;

    self.scrollView.minimumZoomScale=0.2;

}

- (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView

{

    return self.mView;

}

@end

    self.timer =[NSTimer scheduledTimerWithTimeInterval:2.0 target:self selector:@selector(method) userInfo:nil repeats:YES];

    //让ui主线程 循环调用定时器

    [[NSRunLoop currentRunLoop] addTimer:self.timer forMode:NSRunLoopCommonModes];

     label.frame = CGRectMake(, , , );

     label.layer.cornerRadius = ;

    //label.layer.masksToBounds=YES;

     label.clipsToBounds = YES;