iphone上下左右手势判断代码

源自:http://www.feni.cn/ArticlesDetails.aspx?ArticlesId=86

//四个方向手势引发不同程序响应

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

NSLog(@"Swipe received.");

self.uid = [[UIDevice currentDevice] uniqueIdentifier];

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

}

}

- (void)viewDidLoad {

UISwipeGestureRecognizer *recognizer;

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

[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];

}