UIButton setAttributedTitle：forState：不显示 [英] UIButton setAttributedTitle: forState: Not Showing Up

问题描述

我正在尝试在自定义UIButton上为我的标题添加下划线，但是按照此处的示例，我可以不要让它显示在屏幕上。

I am trying to add underlining to my title on a custom UIButton but by following the example found here, I can't get it to show on the screen.

以下是我尝试使用的代码：

Here is the code I am trying to use:

NSMutableAttributedString *commentString = [[NSMutableAttributedString alloc] initWithString:@"The Quick Brown Fox"];

[commentString addAttribute:NSUnderlineStyleAttributeName value:[NSNumber numberWithInteger:NSUnderlineStyleSingle] range:NSMakeRange(0, [commentString length])];

[button setAttributedTitle:commentString forState:UIControlStateNormal];

这不显示。但是，如果我只是做一个常规的，如下：

This doesn't show up. But if I just do a regular one, like so:

[button setTitle:@"The Quick Brown Fox" forState:UIControlStateNormal];

这显示罚款。有人能告诉我我错过了什么吗？

This shows up fine. Can someone tell me what I am missing?

推荐答案

我在这里意识到了这个问题。我以为它没有出现，因为我看不到它。然而，它出现了，它只是与背景颜色相同。

I realized the problem here. I assumed that it was not showing up because I could not see it. However, it was showing up, it is just the same color as the background.

我错误地认为 [button setTitleColor：myColor forState：UIControlStateNormal]; 将是attributionTitle所具有的颜色也用。但是，我的背景是黑色，NSMutableAttributedString必须默认为黑色。

I wrongly assumed that [button setTitleColor:myColor forState:UIControlStateNormal]; would be the color that the attributedTitle would use as well. However, my background is black and the NSMutableAttributedString must default to black.

[commentString addAttribute:NSForegroundColorAttributeName value:myColor  range:NSMakeRange(0, [commentString length])];

使其正确显示。

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