CAAnimation

在ViewController.m中

- (void)viewDidLoad {
    [super viewDidLoad];
    
 
       self.imageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"tutu.png"]];
    self.imageView.frame = CGRectMake(100, 100, 100, 100);
    [self.view addSubview:self.imageView];

//添加一个计时器，scheduledTimerWithTimeInterval参数代表 多长时间执行一次，
    [NSTimer  scheduledTimerWithTimeInterval:1 target:self selector:@selector(zhuanzhuan) userInfo:nil repeats:YES];

}

-(void)zhuanzhuan{

   
   [UIView  animateWithDuration:1.0f animations:^{

     __weak typeof(self)pSelf = self;

   //根据nstimer的设置，到这里一秒执行一次旋转，
       //让一个view 按照它的本身的transform 去改变 transform  可以多次执行
         //第一个参数    获取一个view transform
       //第二个参数  旋转的角度
       self.imageView.transform = CGAffineTransformRotate(self.imageView.transform, M_PI/2);

 

 //，同样的缩放也是一秒一次

     if (self.imageView.frame.size.width>200) {
           pSelf.imageView.transform = CGAffineTransformScale(pSelf.imageView.transform, 0.5, 0.5);
           NSLog(@"2");
      }else{
      
           pSelf.imageView1.transform = CGAffineTransformScale(pSelf.imageView.transform, 2, 2);
      
           NSLog(@"1");
       }

       //从屏幕的四周走一遍

       if (pSelf.imageView.frame.origin.x == 0 && pSelf.imageView.frame.origin.y == 0) {
          pSelf.imageView.transform = CGAffineTransformTranslate(pSelf.imageView.transform, pSelf.view.frame.size.width - 200, 0);
       } else if (pSelf.imageView.frame.origin.x == pSelf.view.frame.size.width - 200 && pSelf.imageView.frame.origin.y == 0) {
           pSelf.imageView.transform = CGAffineTransformTranslate(pSelf.imageView.transform, 0, pSelf.view.frame.size.height - 200);
       } else if (pSelf.imageView.frame.origin.x == pSelf.view.frame.size.width - 200 && pSelf.imageView.frame.origin.y == pSelf.view.frame.size.height - 200) {
          pSelf.imageView.transform = CGAffineTransformTranslate(pSelf.imageView.transform, -(pSelf.view.frame.size.width - 200), 0);
      } else {
           pSelf.imageView.transform = CGAffineTransformTranslate(pSelf.imageView.transform, 0, -(pSelf.view.frame.size.height - 200));
       }
     

 

 

 

   }
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{

     [UIView animateWithDuration:1.0f animations:^{
         //设置View的属性为旋转， 就一个参数代表旋转的角度 ,仅仅只是旋转一下，
     //  self.imageView.transform = CGAffineTransformMakeRotation(M_PI /4);
          //设置View的属性为缩放， 分别代表的是X方向 y方向放大的范围 ，缩放一下
        // self.imageView1.transform = CGAffineTransformMakeScale(2, 2);
         //设置View的transform为平移 两个参数 分别代表X方向 y方向， 平移的范围+ 和一切代表方向 平移一下
         self.imageView1.transform = CGAffineTransformMakeTranslation(100, 100);
         
         
        
         
     }];
    


}