手势 UISwipeGestureRecognizer 轻扫手势(uiswipegesturerecog,手势,轻扫手势,开发技术)

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

轻扫方向
UISwipeGestureRecognizerDirectionRight
UISwipeGestureRecognizerDirectionLeft
UISwipeGestureRecognizerDirectionUp
UISwipeGestureRecognizerDirectionDown

设置轻扫方向,让左右方向都存在 只要枚举值中又左移运算符,代表枚举值可以通过按位或 | 让多个枚举值存在

warning :::::上下 和左右方向 在一个手势识别器中不能同时存在

如果想要上下左右四个方法都有,就要创建两个轻扫手势对象,一个支持上下,一个支持左右.

swipeGesture.direction = UISwipeGestureRecognizerDirectionLeft | UISwipeGestureRecognizerDirectionRight ;

[redView addGestureRecognizer:swipeGesture];

[swipeGesture release];

- (void)swipeGesture :(UISwipeGestureRecognizer *)swipeGesture
{
NSLog(@"%u", swipeGesture.direction);
swipeGesture.view.backgroundColor = [UIColor random];
}