How do you add multi-line text to a UIButton?(如何向 UIButton 添加多行文本?)

本文介绍了如何向 UIButton 添加多行文本?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我有以下代码...

UILabel *buttonLabel = [[UILabel alloc] initWithFrame:targetButton.bounds];
buttonLabel.text = @"Long text string";
[targetButton addSubview:buttonLabel];
[targetButton bringSubviewToFront:buttonLabel];

...我的想法是我可以为按钮设置多行文本，但文本总是被 UIButton 的 backgroundImage 遮挡.显示按钮子视图的日志调用显示已添加 UILabel，但无法看到文本本身.这是 UIButton 中的错误还是我做错了什么?

...the idea being that I can have multi-line text for the button, but the text is always obscured by the backgroundImage of the UIButton. A logging call to show the subviews of the button shows that the UILabel has been added, but the text itself cannot be seen. Is this a bug in UIButton or am I doing something wrong?

推荐答案

对于iOS 6及以上，使用以下允许多行:

button.titleLabel.lineBreakMode = NSLineBreakByWordWrapping;
// you probably want to center it
button.titleLabel.textAlignment = NSTextAlignmentCenter; // if you want to 
[button setTitle: @"Line1
Line2" forState: UIControlStateNormal];

对于 iOS 5 及更低版本，使用以下命令允许多行:

button.titleLabel.lineBreakMode = UILineBreakModeWordWrap;
// you probably want to center it
button.titleLabel.textAlignment = UITextAlignmentCenter;
[button setTitle: @"Line1
Line2" forState: UIControlStateNormal];

2017 年，适用于 iOS9 前版，

一般来说，只需做这两件事:

generally, just do these two things:

  1. 选择属性文本"
  2. 在换行符"弹出窗口中选择自动换行"

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