调整文本的字体大小以适合UIButton [英] Adjust font size of text to fit in UIButton

问题描述

我想确保按钮文本适合UIButton，而UIButton具有固定大小。

I want to make sure the button text fits into a UIButton, while the UIButton has a fixed size.

当然，我可以访问UIButton的titleLabel。
在标签中我将 autoshrink 设置为最小字体比例，似乎对应于

Of course I can access the titleLabel of the UIButton. In a label I would set autoshrink to minimum font scale which seems to correspond to

self.myButton.titleLabel.adjustsFontSizeToFitWidth = YES;

，但实际上表现不一样，因为它只会使文本水平适合边界，而不是垂直，因此不会改变字体大小。

, but doesn't really behave the same, since it only makes the text fits horizontally into the bounds, not vertically, thereby not changing the font size.

如何以编程方式实际调整标签的字体大小以使文本适合标签边界（如图所示）在下图中的目标中）？

How can i actually adjust the font size of a label programmatically to make the text fit into the label bounds (as shown in Goal in the picture below) ?

我已经尝试了

self.myButton.titleLabel.numberOfLines = 0;
self.myButton.titleLabel.minimumScaleFactor = 0.5f;

没有成功，总是以 adjustsFontSizeToFitWidth 在上面图片的左侧。

without success, always ended up as in adjustsFontSizeToFitWidth on the left side of the pic above.

编辑：解决方案也必须符合ios7

推荐答案

self.mybutton.titleLabel.minimumScaleFactor = 0.5f;
self.mybutton.titleLabel.numberOfLines = 0;   <-- Or to desired number of lines
self.mybutton.titleLabel.adjustsFontSizeToFitWidth = YES;

...在viewDidLoad
中的layoutIfNeeded之后做了诀窍事实证明，所有那些必须设置为实际调整字体大小，而不仅仅是使其适合框架。

... did the trick, after layoutIfNeeded in viewDidLoad As it turns out, all those must be set to actually adjust the font-size, not just making it fit into the frame.

mybutton.titleLabel?.minimumScaleFactor = 0.5
mybutton.titleLabel?.numberOfLines = 0   <-- Or to desired number of lines
mybutton.titleLabel?.adjustsFontSizeToFitWidth = true

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