iOS开发--手势的上下左右滑动

手势的应用代码示例

如何为view添加手势以及对手势做出响应呢

为view添加手势首先定义一个手势对象

UISwipeGestureRecognizer * recognizer;

2.给view添加上四种手势的代码如下：

添加右滑手势：

recognizer = [[UISwipeGestureRecognizeralloc]initWithTarget:selfaction:@selector(handleSwipeFrom:)];    [recognizer setDirection:(UISwipeGestureRecognizerDirectionRight)];    [self.view addGestureRecognizer:recognizer];

添加左滑手势：

recognizer = [[UISwipeGestureRecognizeralloc]initWithTarget:selfaction:@selector(handleSwipeFrom:)];  [recognizer setDirection:(UISwipeGestureRecognizerDirectionLeft)];  [self.view addGestureRecognizer:recognizer];

添加上滑手势：

recognizer = [[UISwipeGestureRecognizeralloc]initWithTarget:selfaction:@selector(handleSwipeFrom:)];    [recognizer setDirection:(UISwipeGestureRecognizerDirectionUp)];    [self.view addGestureRecognizer:recognizer];

添加下滑手势：

recognizer = [[UISwipeGestureRecognizeralloc]initWithTarget:selfaction:@selector(handleSwipeFrom:)];    [recognizer setDirection:(UISwipeGestureRecognizerDirectionDown)];    [self.view addGestureRecognizer:recognizer];

添加手势的响应事件:

- (void)handleSwipeFrom:(UISwipeGestureRecognizer*)recognizer{if(recognizer.direction ==UISwipeGestureRecognizerDirectionDown) {NSLog(@"swipe down");    }if(recognizer.direction ==UISwipeGestureRecognizerDirectionUp) {NSLog(@"swipe up");    }if(recognizer.direction ==UISwipeGestureRecognizerDirectionLeft) {NSLog(@"swipe left");    }if(recognizer.direction ==UISwipeGestureRecognizerDirectionRight) {NSLog(@"swipe right");    }}

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