如何覆蓋swift中的UIView.pointInside？

我試圖將我的代碼從obj-c移植到swift，但遇到了很多麻煩。如何覆蓋swift中的UIView.pointInside？

的問題之一是覆蓋一個UIView類的pointInside：如果我添加

/xxx.swift:37:10: Method 'pointInside(_:withEvent:)' with Objective-C selector 'pointInside:withEvent:' conflicts with method 'pointInside(_:withEvent:)' from superclass 'UIView' with the same Objective-C selector

「：

class MyView : UIView{ 
func pointInside(point: CGPoint, withEvent event: UIEvent) -> Bool { 
    if point.x < 0 { 
     return false 
    } else { 
     return true 

    } 
}}

如果我不加「覆蓋」，我會得到這個錯誤覆蓋「，我會得到這個錯誤：

/xxx.swift:37:19: Method does not override any method from its superclass

根據文檔，應該有一個pointInside函數

https://developer.apple.com/library/ios/documentation/UIKit/Reference/UIView_Class/#//apple_ref/occ/instm/UIView/pointInside:withEvent：

來源

2016-01-17 Bill Yan

UIKit中的函數被聲明爲

func pointInside(_ point: CGPoint, withEvent event: UIEvent?) -> Bool

（即）需要匹配的可選性。

此錯誤消息似乎不太有用;你可能想要file a bug。

來源

2016-01-17 01:26:46 jtbandes

雨燕2.2語法

override func pointInside(point: CGPoint, withEvent event: UIEvent?) -> Bool { 
    return true 
}

注意的UIEvent必須是選擇性相匹配的超

來源

2016-06-01 22:24:10 Fraser

你可以用條件檢查覆蓋也很喜歡：

class PassThroughView: UIView { 

    override func pointInside(point: CGPoint, withEvent event: UIEvent?) -> Bool { 
      for subview in subviews as [UIView] { 
       if !subview.hidden && subview.alpha > 0 && subview.userInteractionEnabled && subview.pointInside(convertPoint(point, toView: subview), withEvent: event) { 
        return true 
       } 
      } 
      return false 
     } 
    }

原帖：Swift: hitTest for UIView underneath another UIView

來源

2017-10-04 12:53:29 Rahul

如何覆蓋swift中的UIView.pointInside？

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