ios开发手势处理之手势识别二
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#import "ViewController.h" @interface ViewController ()<UIGestureRecognizerDelegate> @property (weak, nonatomic) IBOutlet UIImageView *imageV; @end @implementation ViewController - (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view, typically from a nib. self.imageV.userInteractionEnabled = YES; //添加旋转手势 [self rotationGes]; //添加捏合手势 [self pinch]; } //Simultaneous:同时 //是否允许同时支持多个手势 -(BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer{ return YES; } //添加旋转手势 - (void)rotationGes{ //添加旋转手势 UIRotationGestureRecognizer *rotation = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(rotationGes:)]; rotation.delegate = self; [self.imageV addGestureRecognizer:rotation]; } - (void)rotationGes:(UIRotationGestureRecognizer *)rotationGes{ self.imageV.transform = CGAffineTransformRotate(self.imageV.transform, rotationGes.rotation); //复位 [rotationGes setRotation:0]; } //添加捏合手势 - (void)pinch{ UIPinchGestureRecognizer *pinch = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(pinch:)]; pinch.delegate = self; [self.imageV addGestureRecognizer:pinch]; } //当缩放时调用 - (void)pinch:(UIPinchGestureRecognizer *)pinch{ NSLog(@"%s",__func__); self.imageV.transform = CGAffineTransformScale(self.imageV.transform, pinch.scale,pinch.scale ); //复位 [pinch setScale:1]; } - (void)panGes{ //添加拖动手势 UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(pan:)]; [self.imageV addGestureRecognizer:pan]; } //当拖动View时调用 - (void)pan:(UIPanGestureRecognizer *)pan { //获取偏移量(相对于最原始的偏移量) CGPoint transP = [pan translationInView:self.imageV]; NSLog(@"%@",NSStringFromCGPoint(transP)); self.imageV.transform = CGAffineTransformTranslate(self.imageV.transform, transP.x, transP.y); //让它相对于上一次 //复位. [pan setTranslation:CGPointZero inView:self.imageV]; } @end
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