xcode 如何以编程方式将视图设置为前/后？
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How to programmatically set view to the front/back?
提问by Ross Sullivan
I'm working on an application that uses UIViews as backgrounds to text. I've put the views behind the text in the storyboardbut for some reason some still seem to be in front of the text. Is there a way to send these view to the back programmatically? Here is a screenshot of what im talking about
我正在开发一个使用UIViews 作为文本背景的应用程序。我已经把这些观点放在了文本后面，storyboard但出于某种原因，有些观点似乎仍然在文本前面。有没有办法以编程方式将这些视图发送到后面？这是我在说什么的截图
回答by Harsh
You can use on of these two:
您可以使用以下两个中的一个：
- (void)bringSubviewToFront:(UIView *)view;
- (void)sendSubviewToBack:(UIView *)view;
Objective-C Usage
Objective-C 的用法
view.sendSubviewToBack(subview)and view.bringSubviewToFront(subview)
view.sendSubviewToBack(subview)和 view.bringSubviewToFront(subview)
SWIFT 4.2 Usage
SWIFT 4.2 用法
view.sendSubview(toBack: subview)
view.bringSubview(toFront: subview)
- bringSubviewToFront: Moves the specified subview so that it appears on top of its siblings.
- sendSubviewToBack: Moves the specified subview so that it appears behind its siblings.
- BringSubviewToFront：移动指定的子视图，使其出现在其兄弟视图的顶部。
- sendSubviewToBack：移动指定的子视图，使其出现在其兄弟视图的后面。
https://developer.apple.com/reference/uikit/uiview?language=objc
https://developer.apple.com/reference/uikit/uiview?language=objc
回答by Evgeny Karkan
sendSubviewToBackAPI is what you want for this task.
sendSubviewToBackAPI 是您在此任务中想要的。
Moves the specified subview so that it appears behind its siblings.
This method moves the specified view to the beginning of the array of views in the subviews property.
移动指定的子视图，使其出现在其兄弟视图的后面。
此方法将指定的视图移动到 subviews 属性中的视图数组的开头。
UIViewclass reference
UIView类参考
Below is a code snippet in Swiftlang of how to call this API:
以下是Swift如何调用此 API 的 lang代码片段：
Swift
迅速
yourSuperview.sendSubviewToBack(yourSubview)
