特定手势的同步手势识别 [英] Simultaneous gesture recognition for specific gestures

问题描述

我正在尝试启用同步手势识别，但仅适用于 UIPinchGestureRecognizer 和 UIRotationGestureRecognizer 手势.我不希望它适用于任何其他手势.如果我将以下属性设置为 true，它允许同时识别所有手势，我如何将其限制为仅旋转和缩放?

I'm trying to enable simultaneous gesture recognition but only for the UIPinchGestureRecognizer and UIRotationGestureRecognizer gestures. I don't want it to work for any other gestures. If I set the following property to true it allows all gestures to be recognized simultaneously, how can I limit it to just rotating and scaling?

func gestureRecognizer(UIGestureRecognizer, shouldRecognizeSimultaneouslyWithGestureRecognizer: UIGestureRecognizer) -> Bool {
    return true
}

推荐答案

确保你的类实现了 UIGestureRecognizerDelegate

class YourViewController: UIViewController, UIGestureRecognizerDelegate ...

<小时>

设置手势的delegate为self

yourGesture.delegate = self

<小时>

为类添加委托函数

---

Add delegate function to your class

func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldRecognizeSimultaneouslyWith otherGestureRecognizer: UIGestureRecognizer) -> Bool {
    if (gestureRecognizer is UIPanGestureRecognizer || gestureRecognizer is UIRotationGestureRecognizer) {
        return true
    } else {
        return false
    }
}

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