#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