如何在Swift中向后发送UIView元素 [英] How to send a UIView element backwards in Swift

问题描述

所以我有一个我在main.Storyboard中添加的Button，以及View的主背景，然后在viewController.swift文件中，我创建了一个UIView矩形形状，我想要坐在该按钮后面（作为它的背景）。

So I have a Button which i have added in main.Storyboard, along with a main background for the View, and then in the viewController.swift file, I have created a UIView rectangle shape which I want to sit behind that button (as a background for it).

问题是，当我添加矩形UIView时，它总是将它添加到按钮前面。所以我在网上研究并找到了sendSubviewToBack代码。我添加了这个，但它一直发送到视图的主UIImage背景后面。

The problem is, when I added the rectangle UIView it always added it in front of the button. So I researched online and found the sendSubviewToBack code. I have added this in, but it sends it all the way behind the main UIImage background of the view.

有没有办法可以在按钮后面发送这个UIView但是在UIImage背景前面？

Is there a way i can just send this UIView behind the button but in front of the UIImage background?

func nextBarDisplayed() {

    let theHeight = self.view.frame.height
    nextBar.backgroundColor = UIColor(red: 7/255, green: 152/255, blue: 253/255, alpha: 0.5)
    nextBar.frame = CGRect(x: 0, y: theHeight - 50, width: self.view.frame.width, height: 50)
    self.view.insertSubview(nextBar, aboveSubview: myBackgroundView)

}

推荐答案

来自 apple documentation ：

bringSubviewToFront(_:)
sendSubviewToBack(_:)
removeFromSuperview()
insertSubview(_:atIndex:)
insertSubview(_:aboveSubview:)
insertSubview(_:belowSubview:)
exchangeSubviewAtIndex(_:withSubviewAtIndex:)

你可以使用以下方式将你的酒吧带到前面：

You can bring your bar to the front using:

view.bringSubviewToFront(nextBar) 

您使用以下方式将视图发送到酒吧后面：

Your send your view to the back of the bar using:

nextBar.view.sendSubviewToBack(myView)

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