手势识别之平移、缩放、长按、旋转、滑动

绝地灬酷狼 2022-03-31 15:38 391阅读 0赞

前面了解了手势识别的点击以及代理方法，其他的几个手势识别都是差不多

#import "ViewController.h"
    
    @interface ViewController ()
    @property(nonatomic,strong)UIImageView *imgView;
    
    @end
    
    @implementation ViewController
    
    - (void)viewDidLoad {
        [super viewDidLoad];
       
        self.imgView=[[UIImageView alloc]initWithImage:[UIImage imageNamed:@"test.jpg"]];
        self.imgView.frame=CGRectMake(100, 100, 100, 100);
        self.imgView.userInteractionEnabled=YES;
        self.imgView.multipleTouchEnabled=YES;
        [self.view addSubview:self.imgView];
        
         //拖动
        UIPanGestureRecognizer *panGestureRecognizer=[[UIPanGestureRecognizer alloc]initWithTarget:self action:@selector(panGesture:)];
        [self.imgView addGestureRecognizer:panGestureRecognizer];
        
        //滑动手势
        UISwipeGestureRecognizer *swipeGestureRecognizer=[[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(swipeGesture:)];
        //方向
        swipeGestureRecognizer.direction=UISwipeGestureRecognizerDirectionRight|UISwipeGestureRecognizerDirectionLeft;
        [self.imgView addGestureRecognizer:swipeGestureRecognizer];
        
        //长按手势
        UILongPressGestureRecognizer *longPressGestureRecongnizer=[[UILongPressGestureRecognizer alloc]initWithTarget:self action:@selector(longPressGesture:)];
         //按的最短时间
        longPressGestureRecongnizer.minimumPressDuration=2.0;
        // 长按手势识别之前点击次数
        longPressGestureRecongnizer.numberOfTapsRequired=1;
        //需要几个手指
        longPressGestureRecongnizer.numberOfTouchesRequired=1;
        //运行偏移量
        longPressGestureRecongnizer.allowableMovement=10.0;
        [self.imgView addGestureRecognizer:longPressGestureRecongnizer];
        
        //旋转
        UIRotationGestureRecognizer *rotationGestureRecognizer=[[UIRotationGestureRecognizer alloc]initWithTarget:self action:@selector(rotationGesture:)];
        [self.imgView addGestureRecognizer:rotationGestureRecognizer];
        
        //缩放
        UIPinchGestureRecognizer *pinchGestureRecognizer=[[UIPinchGestureRecognizer alloc]initWithTarget:self action:@selector(pinchGesture:)];
        [self.imgView addGestureRecognizer:pinchGestureRecognizer];
        
        
    }
    //平移
    -(void)panGesture:(UIPanGestureRecognizer*)pan
    {
        //在View中的位置
        CGPoint point=[pan locationInView:pan.view];
        //在View中的移动量 以手指按下的为原点
        CGPoint point1=[pan translationInView:self.view];
        NSLog(@"%@",NSStringFromCGPoint(point1));
    //    NSLog(@"%@",NSStringFromCGPoint(point1));
        CGPoint temp=self.imgView.center;
        temp.x+=point1.x;
        temp.y+=point1.y;
        self.imgView.center=temp;
        //偏移量是增加的应该设为0
        [pan setTranslation:CGPointZero inView:pan.view];
    }
    //长按
    -(void)longPressGesture:(UIGestureRecognizer*)gestureRecognizer
    {
        NSLog(@"UILongPressGestureRecognizer");
    }
     //滑动
    -(void)swipeGesture:(UIGestureRecognizer *)gestureRecognizer
    {
         NSLog(@"UISwipeGestureRecognizer");
    }
    - (void)didReceiveMemoryWarning {
        [super didReceiveMemoryWarning];
        
    }
    //旋转
    -(void)rotationGesture:(UIRotationGestureRecognizer *)gestureRecognizer
    {
        NSLog(@"旋转的角度:%lf",gestureRecognizer.rotation);
    //    self.imgView.transform=CGAffineTransformMakeRotation(gestureRecognizer.rotation);
        self.imgView.transform=CGAffineTransformRotate(self.imgView.transform, gestureRecognizer.rotation);
        gestureRecognizer.rotation=0;
    }
    //缩放
    -(void)pinchGesture:(UIPinchGestureRecognizer *)pinchGesture
    {
        NSLog(@"%lf",pinchGesture.scale);
    //    self.imgView.transform=CGAffineTransformMakeScale(pinchGesture.scale, pinchGesture.scale);
        self.imgView.transform=CGAffineTransformScale(self.imgView.transform, pinchGesture.scale, pinchGesture.scale);
        //回初始值
        pinchGesture.scale=1.0;
    }
    
    @end