当数字更改时，iOS防止计时器UILabel``晃动'' [英] iOS Prevent timer UILabel 'shaking' when numbers change

问题描述

我有一个UILabel，它以MM:ss:SS格式(分钟，秒，厘秒)显示计时器的输出，但是随着厘秒宽度的变化，它从左向右摇动-"11"比"33"窄.

I have a UILabel which shows the output of a timer in the format MM:ss:SS (minutes, seconds, centiseconds), however it "shakes" from left to right as the width of the centiseconds changes - "11" is narrower than "33" for example.

有什么办法可以减轻这种情况?我尝试将它居中，给它固定的宽度，但是它们似乎并没有帮助.

Is there any way I can mitigate this? I've tried centring it, giving it a fixed width but they haven't seemed to help.

推荐答案

自iOS 9.0起，系统字体使用比例数字.如果需要等宽数字，可以使用+[UIFont monospacedDigitSystemFontOfSize:weight:]获得一种变体字体.这仅适用于系统字体.

Since iOS 9.0, the system font uses proportional digits. If you want monospaced digits, there's a variant font which you can obtain using +[UIFont monospacedDigitSystemFontOfSize:weight:]. This only works for the system font.

如果要使用另一种字体，则尝试要求等宽的变体，但可能没有.给定一个UIFont，您可以请求它的fontDescriptor，然后要求使用-[UIFontDescriptor fontDescriptorWithSymbolicTraits:]和UIFontDescriptorTraitMonoSpace等宽(而不是数字)的类似字体描述符.然后，您可以通过将新的字体描述符传递到+[UIFont fontWithDescriptor:size:]来创建新的字体.

If you want to work with another font, you try to ask for a monospaced variant, but there may not be one. Given a UIFont, you can request its fontDescriptor, then ask that for a similar font descriptor that's monospaced (not just for digits) using -[UIFontDescriptor fontDescriptorWithSymbolicTraits:] and UIFontDescriptorTraitMonoSpace. You can then create a new font by passing the new font descriptor to +[UIFont fontWithDescriptor:size:].

但是，我怀疑是否有Impact的等宽变体.这不适合您的目的.

However, I doubt there's a monospace variant of Impact. It's not suitable for your purpose.

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