6种手势的讲解

在这里主要讲解一下自己理解的关于6种手势的相关内容
六种手势包括:

轻击手势（TapGestureRecognizer）,

轻扫手势 （SwipeGestureRecognizer）,

长按手势（LongPressGestureRecognizer）,

拖动手势（PanGestureRecognizer）,

捏合手势（PinchGestureRecognizer）,

旋转手势（RotationGestureRecognizer）,

(1)、轻击手势（包括单击和双击）
//单击

 {  UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(tapAction:)];    [imageV addGestureRecognizer:tap];    }    //方法    -(void)tapAction:(UITapGestureRecognizer*)tap{    NSLog(@"单击");   }

//双击

{UITapGestureRecognizer *doubleTap = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(doubleTapAction:)];    doubleTap.numberOfTapsRequired = 2;    [imageV addGestureRecognizer:doubleTap];    //双击失败了才算单击(双击成功就是双击)    [tap requireGestureRecognizerToFail:doubleTap];    }-(void)doubleTapAction:(UITapGestureRecognizer*)tap{    NSLog(@"双击");}

（2）轻扫手势

{UISwipeGestureRecognizer *swipe = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(swipeAction:)];    //属性:设置轻扫的方向(默认 右)//swipe.direction = UISwipeGestureRecognizerDirectionRight;    [imageV addGestureRecognizer:swipe];}-(void)swipeAction:(UISwipeGestureRecognizer*)swipe{    NSLog(@"轻扫");}

（3）长按手势

{UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc]initWithTarget:self action:@selector(longPressAction:)];    [imageV addGestureRecognizer:longPress];    //其中属性allowableMovement:是允许抖动的范围}-(void)longPressAction:(UILongPressGestureRecognizer*)longPress{    if (longPress.state == UIGestureRecognizerStateBegan) {    NSLog(@"长按开始");    }else if (longPress.state ==UIGestureRecognizerStateEnded){        NSLog(@"长按结束");    }    }

（4）拖动手势

{UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc]initWithTarget:self action:@selector(panAction:)];    [imageV addGestureRecognizer:pan];    //轻扫和移动的冲突,一旦有冲突,默认移动    //轻扫失败算移动  (轻扫成功就是轻扫)    [pan requireGestureRecognizerToFail:swipe];}-(void)panAction:(UIPanGestureRecognizer*)pan{//    NSLog(@"移动...");    //设置当前位置的坐标(相对 起始点 )     CGPoint p1 =[pan translationInView:imageV];    NSLog(@"p1 = %@",NSStringFromCGPoint(p1));    //移动点的速度//    CGPoint v1 = [pan velocityInView:imageV];//    NSLog(@"v1 = %@",NSStringFromCGPoint(v1));    //设置当前位置//    CGPoint p2 = CGPointMake(100, 100);//    [pan setTranslation:p2 inView:imageV];}

（5）捏合手势

{UIPinchGestureRecognizer *pinch = [[UIPinchGestureRecognizer alloc]initWithTarget:self action:@selector(pinchAction:)];    [imageV addGestureRecognizer:pinch];}-(void)pinchAction:(UIPinchGestureRecognizer*)pinch{    /*属性     scale:缩放的大小比例     velocity:缩放的速度     */    if (pinch.state ==UIGestureRecognizerStateChanged) {        NSLog(@"一直捏合");        CGFloat pScale  =pinch.scale;        pinch.view.transform = CGAffineTransformMakeScale(pScale, pScale);       }else if (pinch.state == UIGestureRecognizerStateEnded){        NSLog(@"捏合结束");        [UIView animateWithDuration:0.2 animations:^{                    pinch.view.transform =CGAffineTransformIdentity;        }];    }}

（6）旋转手势

{UIRotationGestureRecognizer *rotation = [[UIRotationGestureRecognizer alloc]initWithTarget:self action:@selector(rotationAction:)];    [imageV addGestureRecognizer:rotation];}-(void)rotationAction:(UIRotationGestureRecognizer*)rotation{    /*     rotation:旋转的弧度 角度:0~360   弧度:0~2π     velocity:旋转的速度     */    if (rotation.state == UIGestureRecognizerStateChanged) {        NSLog(@"一直旋转");            CGFloat angle = rotation.rotation;             rotation.view.transform = CGAffineTransformMakeRotation(angle);         }else if (rotation.state == UIGestureRecognizerStateEnded){        NSLog(@"旋转结束");        [UIView animateWithDuration:0.2 animations:^{                    rotation.view.transform = CGAffineTransformIdentity;        }];    }}

在模拟器上进行手势操作时可能会出现错误，建议尽量在真机上进行操作。