iOS 上下左右手势识别_计算机技术学习交流网

- (void)viewDidLoad {

//建立滑动手势

UISwipeGestureRecognizer *recognizer;

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

//设置滑动方向，下面以此类推

[recognizer setDirection:(UISwipeGestureRecognizerDirectionRight)];

[[self view] addGestureRecognizer:recognizer];

[recognizer release];

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

[recognizer setDirection:(UISwipeGestureRecognizerDirectionUp)];

[[self view] addGestureRecognizer:recognizer];

[recognizer release];

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

[recognizer setDirection:(UISwipeGestureRecognizerDirectionDown)];

[[self view] addGestureRecognizer:recognizer];

[recognizer release];

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

[recognizer setDirection:(UISwipeGestureRecognizerDirectionLeft)];

[[self view] addGestureRecognizer:recognizer];

[recognizer release];

[super viewDidLoad];

}

//这个是协议回调，所以需要遵循 UIGestureRecognizerDelegate协议

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

NSLog(@"Swipe received."); www.2cto.com

if (recognizer.direction==UISwipeGestureRecognizerDirectionDown) {

NSLog(@"向下滑动");

//执行程序

}

if (recognizer.direction==UISwipeGestureRecognizerDirectionUp) {

NSLog(@"向上滑动");

//执行程序

}

if (recognizer.direction==UISwipeGestureRecognizerDirectionLeft) {

NSLog(@"向左滑动");

//执行程序

}

if (recognizer.direction==UISwipeGestureRecognizerDirectionRight) {

iOS 上下左右手势识别