Swift-如何根据UIView的大小调整UIView的大小(在内部) [英] Swift - How to resize a UIView based on its UILabel size (that is inside)

问题描述

我在Swift中有些新知识，对此我需要一些帮助:

I'm a bit new in Swift, and I need some help with this:

我在UIView中有一个UILabel，此标签可以接收任意数量的文本.因此，我想根据接收到的文本来调整UILabel的大小，并且还要调整其容器UIView的大小.UILabel必须具有最大宽度，但不能具有最大高度.这与Whatsapp中带有消息文本的情况非常相似(他的绿色容器内部的文本也随之增长).

I have a UILabel inside a UIView, and this label can receive any ammount of text. So I want to resize the UILabel based on the text it receives, and also resizes its container, the UIView. The UILabel must have a max width but not max height. It is very similar to what happens in Whatsapp with a message text (his green container grows accordly the text inside).

我相信这与自动布局有关，但我真的不了解其中的大部分内容.

I believe it is about auto layout, but I really can't understand most of it.

动态创建.

有人可以帮助我吗?

推荐答案

包含Label的UIView不应具有固定的高度.只需添加约束以设置UIView宽度和X/Y坐标即可.

The UIView that contains the Label should not have a fixed height then. Just add constraints to set the UIView width and the X/Y coordinates.

在其中，UILabel应该将固定的约束固定为UIView的顶部/底部和右/左，并将其numberOfLines设置为0

Inside it the UILabel should have fixed constraints to Top/Bottom and Right/Left to the UIView and also set it's numberOfLines to 0

在这些约束下，容器视图将展开以根据文本调整高度.

With these constraints the container View will expand to adjust the height based on the text.

请参阅所附的屏幕截图

添加容器视图约束(注意，未添加底部或高度约束)

添加标签约束(所有UIView Edge的固定约束)

带有短文本的结果

带有长文本的结果

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