iOS－响应上下左右滑动手势

最新推荐文章于 2023-03-06 15:45:53 发布

BeanGo

最新推荐文章于 2023-03-06 15:45:53 发布

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分类专栏： IOS开发文章标签： ios

本文链接：https://blog.youkuaiyun.com/BeanGo/article/details/78222928

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本文介绍了一种在iOS应用中实现滑动手势的方法。通过使用UISwipeGestureRecognizer，开发者可以轻松地为视图控制器添加上、下、左、右四个方向的滑动事件监听。当用户在屏幕上滑动手指时，系统会触发相应的处理函数，从而实现特定的功能。

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-(void)viewDidLoad{

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

     [recognizer setDirection:(UISwipeGestureRecognizerDirectionRight)];

    [[self view] addGestureRecognizer:recognizer];

    recognizer = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(handleSwipeFrom:)];

     [recognizer setDirection:(UISwipeGestureRecognizerDirectionLeft)];

    [[self view] addGestureRecognizer:recognizer];
[recognizer release];

    recognizer = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(handleSwipeFrom:)];

     [recognizer setDirection:(UISwipeGestureRecognizerDirectionUp)];
    [[self view] addGestureRecognizer:recognizer];
[recognizer release];



UISwipeGestureRecognizer *recognizer;

    recognizer = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(handleSwipeFrom:)];
     [recognizer setDirection:(UISwipeGestureRecognizerDirectionDown)];
    [[self view] addGestureRecognizer:recognizer];
[recognizer release];


}

-(void)handleSwipeFrom:(UISwipeGestureRecognizer *)recognizer{

if(recognizer.direction==UISwipeGestureRecognizerDirectionDown) {

       NSLog(@"swipe down");
//执行程序
}
if(recognizer.direction==UISwipeGestureRecognizerDirectionUp) {

       NSLog(@"swipe up");
//执行程序
}

if(recognizer.direction==UISwipeGestureRecognizerDirectionLeft) {

       NSLog(@"swipe left");
//执行程序
}

if(recognizer.direction==UISwipeGestureRecognizerDirectionRight) {

       NSLog(@"swipe right");
//执行程序
}

}