自动布局的UILabel高度的第二种观点appearence改变 [英] Autolayout UILabel height changes on second view appearence

问题描述

我有一个TableHeaderView动态的UILabel（<一个href=\"http://stackoverflow.com/questions/22793078/hide-view-and-reposition-other-view-with-autolayouts\">see这个问题），一切都很好，而且很好，但如果我的标签的文本设置为无或 @标签保留，它有当文本是在高度的大小。

I have a dynamic UILabel in a TableHeaderView (see this question) and everything is okay and fine, but if I set the text of the label to nil or @"" the label keeps the size of the height that it had when the text was in.

我改变了在不同的viewController我是 presenting模态的文字。所以我想它告诉你3个步骤：

I'm changing the text in a different viewController that I'm presenting modally. So i would like to show it you in 3 steps:

原来的状态

设置文本 @，后

After setting the text to @""

在这个步骤中，presented的的viewController删除文本，然后我解聘的viewController回去了这一观点。

In this step I presented the viewController to remove the text and then I dismiss the viewController to go back to this View.

重新出现这个视图

所以我要打开编辑的viewController只是再次驳回。然后，它是像我想..：

So I have to open the editing viewController to just dismiss it again. Then it is like i want it to..:

任何想法，为什么？我重新大小的TableViewHeader这样在 viewWillAppear中方法：

Any ideas why? I'm re-sizing the TableViewHeader like this in the viewWillAppear method:

- (void)resizeTableViewHeader
{
    //GET THE SIZE OF THE CONTAINER
    CGSize fittingSize = [self.header systemLayoutSizeFittingSize: UILayoutFittingCompressedSize];
    self.header.frame = CGRectMake(0, 0, 320, fittingSize.height);
    self.tableView.tableHeaderView = self.header;
}

任何想法，为什么我要访问的查看两次？

Any idea why I have to visit the View twice?

推荐答案

也许需要更新约束某处，或 layoutIfNeeded 。其他的解决办法可以在我的其他答案被发现。

Maybe it needs constraints updating somewhere, or layoutIfNeeded. Other solution could be found in my other answer.

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