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  • 五大手势的使用

    tap(点击),loogPress(长按),Rotation(旋转),Pinch(捏合),swipe(轻扫),pan(拖拽)

    *** 如果不响应手势,有以下几种原因

    1、看是否添加到了ImageView 上,如果是把UserInteractionEnabled 设置成YES

    2、查看是否设置 背景颜色,如果没有设置,设置背景颜色

    3、手势的冲突,这时就需要设置手势的优先级,(截获触发事件,手势)设置优先级

    **五大手势继承的父类:UIGestureRecognizer

       UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(tapAction:)];

    //    设置点击手指的个数

        tap.numberOfTouchesRequired = 1;

        

    //   numberOfTapsRequired 设置手指点击的次数

        tap.numberOfTapsRequired = 1;

     

    //   addGestureRecognizer: 添加手势

            [self.view addGestureRecognizer:tap];

        

    #pragma mark--------------长按--------------------------

    //    初始化

        UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc]initWithTarget:self action:@selector(longPress:)];

    //    设置按下的最小持续时间 默认0.5s

        longPress.minimumPressDuration = 1;

     

        

    //    longPress.numberOfTouchesRequired = 2;

        

       //   addGestureRecognizer: 把手势添加到某个视图上

        [self.view addGestureRecognizer:longPress];

     

    #pragma mark ---------拖拽-----------------

    //    初始化

        UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc]initWithTarget:self action:@selector(pan:)];

    //    minimumNumberOfTouches 设置最少的手指个数

        pan.minimumNumberOfTouches = 2;

    //    maximumNumberOfTouches

        [self.view addGestureRecognizer:pan];

     

    #pragma mark-------------轻扫------------------------

    //    初始化

        UISwipeGestureRecognizer *swipe = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(swipe:)];

    //    direction 设置轻扫的方向

        swipe.direction = UISwipeGestureRecognizerDirectionLeft;

    //    处理手势冲突的思想 :谁的手势执行时间短就先执行谁  方法:requireGestureRecognizerToFail

    //   需要轻扫手势 执行完之后  在去执行拖拽手势

        [pan requireGestureRecognizerToFail/*处理拖拽和轻扫 两个手势冲突的方法*/:swipe/*先执行的*/];

        [self.view addGestureRecognizer:swipe];

        

    #pragma mark--------------捏合--------------------------

        UIPinchGestureRecognizer *pinch = [[UIPinchGestureRecognizer alloc]initWithTarget:self action:@selector(pinch:)];

        

        [self.view addGestureRecognizer:pinch];

    #pragma mark---------------旋转-------------------------

        

        UIRotationGestureRecognizer *rotation = [[UIRotationGestureRecognizer alloc]initWithTarget:self action:@selector(rotation:)];

        

        

        [self.view addGestureRecognizer:rotation];

    }

     

    - (void)rotation:(UIRotationGestureRecognizer *)sender{

        

    //    通过旋转手势 让图片进行相同的变形

        imageView.transform = CGAffineTransformMakeRotation(sender.rotation);

        

        

    }

     

    - (void)pinch:(UIPinchGestureRecognizer *)sender{

    //    transform该变原来的形态 (如果不恢复它就一直以这个形态下去)与手势无关

        

    //    通过手势 得到的 变化比例 让imageView的形态发生改变

        imageView.transform = CGAffineTransformMakeScale(sender.scale, sender.scale);

    //    imageView.transform = CGAffineTransformScale(imageView.transform, sender.scale, sender.scale);

        imageView.center = self.view.center;

        

    }

     

    - (void)swipe:(UISwipeGestureRecognizer *)sender{

        

        self.view.frame = CGRectMake(CGRectGetWidth([UIScreen mainScreen].bounds), 0, CGRectGetWidth([UIScreen mainScreen].bounds), CGRectGetHeight([UIScreen mainScreen].bounds));

        [UIView animateWithDuration:2 animations:^{

            

            self.view.frame = CGRectMake(0, 0, CGRectGetWidth([UIScreen mainScreen].bounds), CGRectGetHeight([UIScreen mainScreen].bounds));

        }];

        

        NSLog(@"dsdb");

    }

     

     

     

    - (void)pan:(UIPanGestureRecognizer *)sender{

        //    locationInView: 获取点击的那个触摸点

        CGPoint tapLoc = [sender locationInView:self.view];

        NSLog(@"%f %f",tapLoc.x,tapLoc.y);

        

               //    点击的位置设置成图片视图的这些点

            imageView.center = tapLoc;

       

     

    }

     

    -(void)longPress:(UILongPressGestureRecognizer *)sender{

        

        //    locationInView: 获取点击的那个触摸点

        CGPoint tapLoc = [sender locationInView:self.view];

        NSLog(@"%f %f",tapLoc.x,tapLoc.y);

        //    动画

        [UIView animateWithDuration:0.2 animations:^{

            //    点击的位置设置成图片视图的这些点

            imageView.center = tapLoc;

        }];

        

     

        

    }

     

     

    //单击手势的方法

    - (void)tapAction:(UITapGestureRecognizer *)sender{

     

    //    让视图恢复原来的形态

        imageView.transform = CGAffineTransformIdentity;

        

    //    self.view.backgroundColor = [UIColor redColor];

    //    locationInView: 获取点击的那个点

        CGPoint tapLoc = [sender locationInView:self.view];

        NSLog(@"%f %f",tapLoc.x,tapLoc.y);

    //    动画

        [UIView animateWithDuration:1 animations:^{

            //    点击的位置设置成图片视图的这些点

            imageView.center = tapLoc;

        }];

     

        

    }

     

     

     

      

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  • 原文地址:https://www.cnblogs.com/wukun16/p/4847598.html
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