ios - 从一个 View 中删除一个 View 并将其添加到另一个 View

Question

我正在尝试找到 Nib 中的所有 View 并将它们添加到我的内容 View 中。

这就是我所拥有的，它成功地从 self.view 中删除了 View ，但没有将它添加到 self.contentView

for (UIView *view in self.view.subviews) {
    if (view.tag != 666) {
        [view removeFromSuperview];
        [self.contentView addSubview:view];
    }
}

如有任何帮助，我们将不胜感激。

Answer 1

您的代码中的问题是，当您调用 removeFromSuperview 时，父 View 将释放该 View 。无需调用 removeFromSuperview，只需将其添加为另一个 View 的 subview 即可将其从当前父 View 中移除。

所以使用:

for (UIView *view in self.view.subviews)
{
    if (view.tag != 666)
    {
        [self.contentView addSubview:view];
    }
}

根据 UIView Class Reference :

addSubview:

Adds a view to the end of the receiver’s list of subviews.

- (void)addSubview:(UIView *)view

Parameters

view

The view to be added. This view is retained by the receiver. After being added, this view appears on top of any other subviews. 

Discussion

This method retains view and sets its next responder to the receiver, which is its new superview.

Views can have only one superview. If view already has a superview and that view is not the receiver, this method removes the previous superview before making the receiver its new superview.