如何调整 UIButton 的大小以适应文本而不使其比屏幕更宽?

问题描述

我有一个 UIButton，我想调整它的大小以适应其中的任何文本.它的宽度设置为 280，但文本应换行到下一行并根据需要扩展按钮的高度.

I have a UIButton that I want to resize to fit whatever text is inside it. It has a set width of 280, but the text should wrap to the next line(s) and extend the height of the button as needed.

我已将换行设置为自动换行并尝试了 sizeToFit，但这只会使按钮变宽，而不是垂直.

I've set line breaks to Word Wrap and tried sizeToFit but that only makes the button go wider, not vertical.

推荐答案

我设法让它在 UIButton 的类别中工作:

I managed to get it working in a category of UIButton:

@interface UIButton (ExpandsVertically)

- (CGSize)sizeThatFits:(CGSize)size;

@end

@implementation UIButton (Expandable)

- (CGSize)sizeThatFits:(CGSize)size {

    // for the width, I subtract 24 for the border
    // for the height, I use a large value that will be reduced when the size is returned from sizeWithFont
    CGSize tempSize = CGSizeMake(size.width - 24, 1000);

    CGSize stringSize = [self.titleLabel.text
                         sizeWithFont:self.titleLabel.font
                         constrainedToSize:tempSize
                         lineBreakMode:UILineBreakModeWordWrap];

    return CGSizeMake(size.width - 24, stringSize.height);
}

@end

如果有人使用它，请确保设置:

If anyone uses this make sure to set:

myButton.titleLabel.lineBreakMode = UILineBreakModeWordWrap;

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