表格视图单元格中的溢出下拉按钮:我可以让它可点击吗? [英] Overflowing drop down button in a tableview cell: can I make it clickable?

问题描述

我目前正在做一个项目，在该项目中我在 tableview 单元格中放置了一个下拉按钮.下拉部分"溢出单元格底部并进入下面的单元格.现在我无法点击溢出部分.有没有办法让这部分可点击?您可以在下面的链接中找到我的部分代码

I am currently working on a project where I am placing a drop down button inside a tableview cell. The "drop down part" overflows the bottom of the cell and goes into the cell below. Right now I am are not able to click the overflowing part. Are there a way to make this part clickable? You can find a part of my code in the link below

https://github.com/Rawchris/Drop-down-overflow

为了说明清楚，我希望能够点击上面项目中的选项 3 和 4.如果你想让我进一步解释我的问题，请告诉我.

To spell it out, I would like to be able to click Option 3 and 4 in the project above. Please tell me if you want me to explain my question further.

推荐答案

所以问题是:您有一个超出其父视图的按钮，因此无法单击?是的，您可以使超级视图之外的部分可点击；您需要执行hit-test munging"，覆盖 hitTest(_:with:) 以便按钮可以成为命中测试视图，即使它的一部分在其超级视图之外.您需要在按钮的超级视图中使用此代码(或类似代码):

So the question is: you've got a button that goes outside of its superview and therefore cannot be clicked? Yes, you can make the part outside the superview clickable; you'd need to perform "hit-test munging", overriding hitTest(_:with:) so that the button can be the hit-test view even when part of it is outside its superview. You would need this code (or similar) in the button's superview:

override func hitTest(_ point: CGPoint, with e: UIEvent?) -> UIView? {
    if let result = super.hitTest(point, with:e) {
        return result
    }
    for sub in self.subviews.reversed() {
        let pt = self.convert(point, to:sub)
        if let result = sub.hitTest(pt, with:e) {
            return result
        }
    }
    return nil
}

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