UISwipeGestureRecognizer未添加到视图中

问题描述 投票:0回答:1

我正在尝试向我的视图添加滑动手势识别器。这是我的主视图控制器文件的viewDidLoad()方法中的代码片段:

self.view.addGestureRecognizer(UISwipeGestureRecognizer(target: self, action: #selector(self.swipeHandler(_:))))
self.view.isUserInteractionEnabled = true

这是我在viewDidLoad()函数下面编写的处理程序方法:

@IBAction func swipeHandler(_ gestureRecognizer : UISwipeGestureRecognizer) {
        print("called")
        if gestureRecognizer.state == .ended {
            // Perform action.
            print("ended")
        }
    }

当我滑动时,无论方向是什么,我都看不到控制台上打印的任何内容。

我认为问题出在addGestureRecognizerMethod(),因为当我将其更改为敲击识别器(相同的行,只是UITapGestureRecognizer而不是UISwipeGestureRecognizer)时,我在控制台中打印了“被叫”和“结束”。

任何提示?

ios swift xcode ibaction uiswipegesturerecognizer
1个回答
0
投票
gestureRecognizer(_:shouldRecognizeSimultaneouslyWith:)

像这样:

扩展名YourViewController:UIGestureRecognizerDelegate {

func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldRecognizeSimultaneouslyWith otherGestureRecognizer: UIGestureRecognizer) -> Bool { return true }

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