ios - iOS 通用触控处理程序

Question

是否有任何类型的触摸事件的通用处理程序之类的东西？当发生任何类型的交互时调用的方法，其中有关作为参数传递的触摸事件的信息。

Answer 1

您将要遵守UIGestureRecognizerDelegate 协议，即以下两种方法：

- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer;
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch;

在这些方法中，您可以检查手势识别器对象以查看它是否是您正在寻找的手势类型，并指定手势是否应该开始或接收触摸。

编辑：要检测手势的结束，您将拥有如下内容：

// in viewDidLoad or in initialization of your view controller:
    _panGestureRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(handlePanGestureRecognizer:)];
    [self addGestureRecognizer:_panGestureRecognizer];
    [_panGestureRecognizer setDelegate:self];

- (void)handlePanGestureRecognizer:(UIPanGestureRecognizer *)gesture {
    UIGestureRecognizerState state = [gesture state];
    if (state == UIGestureRecognizerStateEnded) {
        // gesture ended here
    }
}