1 - (void)viewDidLoad 2 { 3     [super viewDidLoad]; 4     UIImage *image = [UIImage imageNamed:@"018.png"]; 5     UIImageView *imageView = [[UIImageView alloc] initWithImage:image]; 6     imageView.frame = CGRectMake(80, 80, 200, 350); 7     [self.view addSubview:imageView]; 8      9     //开启用户交互10     imageView.userInteractionEnabled = YES;11     //缩放手势识别器12     UIPinchGestureRecognizer *pinGes = [[UIPinchGestureRecognizer alloc] init];13     pinGes.delegate = self;14     15     [pinGes addTarget:self action:@selector(pinGes:)];16     [imageView addGestureRecognizer:pinGes];17     18     //旋转手势识别器19     UIRotationGestureRecognizer *rotaGes = [[UIRotationGestureRecognizer alloc] init];20     rotaGes.delegate = self;21     imageView.userInteractionEnabled = YES;22     [rotaGes addTarget:self action:@selector(rota:)];23     [imageView addGestureRecognizer:rotaGes];24     25     26     //移动手势识别器27     UIPanGestureRecognizer *panGes = [[UIPanGestureRecognizer alloc] init];28     [panGes addTarget:self action:@selector(panGes:)];29     [imageView addGestureRecognizer:panGes];30     31     //长按手势识别器32     UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc] init];33     34     //设置长按时间标准(默认时间为0.5秒)35     longPress.minimumPressDuration = 1.0;36     [longPress addTarget:self action:@selector(longPress:)];37     [imageView addGestureRecognizer:longPress];38     39 }40 41 //此方法的返回值表示手势识别器是否支持多手势操作42 - (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer43 {44     return YES;45 }46 47 //长按操作48 - (void) longPress: (UILongPressGestureRecognizer *)ges49 {50     //开始长按时进行的操作51     if (ges.state == UIGestureRecognizerStateBegan) {52         NSLog(@"begin");53         //结束长按时进行的操作54     }else if (ges.state == UIGestureRecognizerStateEnded){55         NSLog(@"end");56     }57 }58 59 //移动操作60 - (void) panGes: (UIPanGestureRecognizer *)ges61 {62     //获取相对于父视图移动的距离63     CGPoint point = [ges translationInView:self.view];64     //开启动画65     [UIView beginAnimations:Nil context:Nil];66     //设置动画时间67     [UIView setAnimationDuration:1];68     //通过形变属性移动69     ges.view.transform = CGAffineTransformTranslate(ges.view.transform, point.x, point.y);70     //因为手势识别器会对每次移动的距离进行累加，所以当移动一次后，需要将相对移动距离设置为（0，0）；71     [ges setTranslation:CGPointMake(0, 0) inView:self.view];72     73     //通过中心点移动74 //    ges.view.center = CGPointMake(ges.view.center.x + point.x, ges.view.center.y + point.y);75 //    [ges setTranslation:CGPointMake(0, 0) inView:self.view];76     //动画结束77     [UIView commitAnimations];78 }79 80 //旋转操作81 - (void) rota: (UIRotationGestureRecognizer *)ges82 {83     //设置形变属性84     ges.view.transform = CGAffineTransformRotate(ges.view.transform, ges.rotation);85     //因为CGAffineTransformRotate函数会将每一次的旋转角度进行叠加，所以需要将手势识别器的旋转角度置0；86     ges.rotation = 0;87 }88 89 //缩放操作90 - (void)pinGes: (UIPinchGestureRecognizer *)ges91 {92 //    NSLog(@"get in...");93     //因为CGAffineTransformScale函数会将缩放比例进行累乘，所以需要将手势识别器的缩放比例设置194     ges.view.transform = CGAffineTransformScale(ges.view.transform, ges.scale, ges.scale);95     ges.scale = 1.0f;96 }