防止 NSAttributedString 中的换行符 [英] Prevent line break in a NSAttributedString

问题描述

我认为当您有一组不想要换行符的单词时，这是一个常见问题.

I think it's a common issue when you have a set of words where you don't want a break line.

有时这些单词之间的字符是空格或连字符等.就我而言，这是一个点:)

Sometimes the character between those words is a space or a hyphen, etc. In my case it's a point :)

这是我的文字 50.0/80.0

最后，我使用尺寸标签并特别测量了该字符串需要多少空间:

At the end I did it using the size label and measuring how much space I need for that string in particular:

UIFont *fontAwardNumber = [UIFont fontWithName:@"DIN-Bold" size:20];

NSStringDrawingContext *context = [[NSStringDrawingContext alloc] init];
CGSize labelSize = (CGSize){customCell.awardValueLabel.bounds.size.width, FLT_MAX};
CGRect rectNeededForAwardNumber = [awardNumber boundingRectWithSize:labelSize options:NSStringDrawingUsesLineFragmentOrigin attributes:@{NSFontAttributeName: fontAwardNumber} context:context];
if (rectNeededForAwardNumber.size.height > customCell.awardValueLabel.bounds.size.height) {
    //We need to add a breakline
    NSRange range = [awardNumber rangeOfString:@"/"];
    if (range.location != NSNotFound) {
        awardNumber = [awardNumber stringByReplacingCharactersInRange:range withString:@"/\n"];
    }
}

我找到了其他解决方案，例如将空格或连字符替换为牢不可破的字符:

I found other solutions like replacing your space or hyphen for unbreakable characters:

防止 NSAttributedString 的一部分出现换行

但我的问题更笼统，NSAttributedString 是否提供了一些东西来将一组单词定义为不可破坏的?或者有没有更简单的方法来处理一般的单词集?

But my question is more general, does NSAttributedString provide something to define a set of words as non breakable? Or is there any easier way to do it for a general set of words?

推荐答案

不，NSAttributedString 没有任何防止范围内换行的每字符属性.您可以将 NSLineBreakMode 设置为 ByClipping 或 NSParagraphStyle 中的其他非换行模式，但这适用于段落中的所有文本.(段落由换行符分隔.)

No, NSAttributedString doesn't have any per-character attributes that preventing line breaking within a range. You can set the NSLineBreakMode to ByClipping or another non-wrapping mode in the NSParagraphStyle, but that applies to all the text in the paragraph. (Paragraphs are separated by newlines.)

为了防止在比整个段落更小的范围内换行，您需要插入一个 U+2060任意两个字符之间的 WORD JOINER，其中可能会出现不需要的中断.在您的示例中，这意味着在斜杠字符的每一侧.

To prevent line breaking in a smaller range than a whole paragraph, you need to insert a U+2060 WORD JOINER between any two characters where an unwanted break might occur. In your example, that means on each side of the slash character.

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