@interface NJViewController ()<UIGestureRecognizerDelegate>
@property (weak, nonatomic) IBOutlet UIImageView *iconView; @end @implementation NJViewController - (void)viewDidLoad
{
[super viewDidLoad]; [self pichTest];
[self rotationTest];
} // 该方法返回的BOOL值决定了view是否能够同时响应多个手势
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer
{
NSLog(@"%@ - %@", gestureRecognizer.class, otherGestureRecognizer.class);
return YES;
} - (void)pichTest
{
// 捏合手势
UIPinchGestureRecognizer *pinch = [[UIPinchGestureRecognizer alloc] init];
pinch.delegate = self; [self.iconView addGestureRecognizer:pinch];
[pinch addTarget:self action:@selector(pinchView:)];
} - (void)pinchView:(UIPinchGestureRecognizer *)pinch
{
// NSLog(@"捏合事件 %.1f", pinch.scale);
// self.iconView.transform = CGAffineTransformMakeScale(pinch.scale, pinch.scale);
// 1.0 * 0.9
self.iconView.transform = CGAffineTransformScale(self.iconView.transform, pinch.scale, pinch.scale); pinch.scale = 1.0;
} - (void)rotationTest
{
// 旋转
UIRotationGestureRecognizer *gesture = [[UIRotationGestureRecognizer alloc] init];
gesture.delegate = self; [self.iconView addGestureRecognizer:gesture];
[gesture addTarget:self action:@selector(rotationView:)];
} - (void)rotationView:(UIRotationGestureRecognizer *)gesture
{
// NSLog(@"旋转事件 %.1f", gesture.rotation); // 每次从最初的位置开始
// self.iconView.transform = CGAffineTransformMakeRotation(gesture.rotation); // 在传入的transform基础上递增一个弧度
self.iconView.transform = CGAffineTransformRotate(self.iconView.transform, gesture.rotation);
// 将旋转的弧度清零(注意不是将图片旋转的弧度清零, 而是将当前手指旋转的弧度清零)
gesture.rotation = ;// 如果理解不了 , 记住就OK
}