从UIScrollView中删除所有子视图？ [英] Remove all the subviews from a UIScrollView?

问题描述

如何从UIScrollview中删除所有子视图？

How do I remove all of the subviews from a UIScrollview?

推荐答案

让 scrollView 是 UIScrollView 的实例。

在Objective-C中，它非常简单。只需调用 makeObjectsPerformSelector：，如下所示：

In Objective-C, it's pretty easy. Just call makeObjectsPerformSelector:, like so:

Objective-C：

[scrollView.subviews makeObjectsPerformSelector:@selector(removeFromSuperview)];

在Swift中，您没有获得运行时访问权限，因此您必须自己实际处理迭代。

In Swift, you don't get that runtime access, so you have to actually handle the iteration yourself.

Swift：

简洁版，从这里：

scrollview.subviews.map { $0.removeFromSuperview() }

更具描述性的方法（来自此处）假设 scrollview.subviews ：

A more descriptive way to do this (from here) assumes scrollview.subviews:

let subviews = self.scrollView.subviews
for subview in subviews{
    subview.removeFromSuperview()
}

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