如何在iOS中处理1到3个手指轻扫手势 [英] how to handle 1 to 3 fingers swipe gesture in iOS

问题描述

我使用以下代码处理我的代码中的1个手指滑动：

I use the following code to handle 1 finger swipe in my code:

UISwipeGestureRecognizer *swipe = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleViewsSwipe:)];
    [swipe setDirection:UISwipeGestureRecognizerDirectionLeft];
    [swipe setDelaysTouchesBegan:YES];
    [[self view] addGestureRecognizer:swipe];

我知道我可以添加以下行以使其处理2个手指滑动：

I know i can add the following line to make it handle 2 fingers swipe:

 [swipe setNumberOfTouchesRequired:2];

然而，当我添加上面的代码时，由于所需的触摸次数，因此不再检测到手指滑动现在2.我可以做些什么来使我的代码适用于1,2或3个手指滑动？

However when I add the above code 1 finger swipe is no longer detected since the number of touches required is now 2. What can I do to make my code work for 1, 2 or 3 fingers swipe?

我尝试使用以下代码，但这不能做到我的意思我想这样做。

I tried using the following code but this doesn't do what I want to do.

UIPanGestureRecognizer *panRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(handleViewsSwipe:)];
    [panRecognizer setMinimumNumberOfTouches:1];
    [panRecognizer setMaximumNumberOfTouches:3];
    [panRecognizer setDelaysTouchesBegan:YES];
    [[self view] addGestureRecognizer:panRecognizer];
    [panRecognizer release];

谢谢。

推荐答案

在handleViewsSwipe中，您可以从手势识别器获取numberOfTouches属性。

In your handleViewsSwipe you can get the numberOfTouches property from the gesture recognizer.

- (void)handleViewsSwipe:(UISwipeGestureRecognizer *)recognizer {
    NSUInteger touches = recognizer.numberOfTouches;
    switch (touches) {
        case 1:
            break;
        case 2:
            break;
        case 3:
            break;
        default:
            break;
    }
}

根据具体情况，只需切换相同的方法你得了多少次接触。

Just switch the same method for what to do depending on how many touches you get.

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