iOS－响应上下左右滑动手势

最新推荐文章于 2024-07-07 03:27:59 发布

原创最新推荐文章于 2024-07-07 03:27:59 发布 · 291 阅读

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#滑动手势

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本文介绍如何在iOS应用中实现各种方向的手势识别功能，包括上、下、左、右四个方向。通过设置UISwipeGestureRecognizer并指定不同的方向，可以轻松地为视图添加响应特定手势的能力。

-(void)viewDidLoad{

UISwipeGestureRecognizer *recognizer; 

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

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

}