ios 附加带有换行符的 NSAttributedString 返回格式错误的属性字符串
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Appending NSAttributedString with line break returns attributed string with wrong format
提问by user3404693
I'm using NSMutableAttributedStringand NSAttributedStringto display a label text in two different font sizes. My approach is:
我正在使用NSMutableAttributedString和NSAttributedString以两种不同的字体大小显示标签文本。我的做法是：
NSMutableAttributedString *muAtrStr = [[NSMutableAttributedString alloc]initWithString:@"2"];
NSAttributedString *atrStr = [[NSAttributedString alloc]initWithString:@"days" attributes:@{NSFontAttributeName : [UIFont fontWithName:@"HelveticaNeue-Bold" size:8]}];
[muAtrStr appendAttributedString:atrStr];
Which returns me an Attributed string with "2" in font size 12 and "days" in font size 8.
这会返回一个属性字符串，字体大小为 12，字体大小为“2”，字体大小为“天”。
However, the other scenario is to add a line break after 2. I use the following code:
但是，另一种情况是在 2 后添加换行符。我使用以下代码：
NSMutableAttributedString *muAtrStr = [[NSMutableAttributedString alloc]initWithString:@"2"];
NSAttributedString *atrStr = [[NSAttributedString alloc]initWithString:@"\ndays" attributes:@{NSFontAttributeName : [UIFont fontWithName:@"HelveticaNeue-Bold" size:8]}];
[muAtrStr appendAttributedString:atrStr];
This time attributed string applies the attribute on the full text. I get an attributed string with "2\ndays" in font size 8.
这次属性字符串将属性应用于全文。我得到一个字体大小为“2\ndays”的属性字符串。
回答by Hussain Shabbir
Try this below code, it works fine:-
试试下面的代码，它工作正常：-
NSMutableAttributedString *muAtrStr = [[NSMutableAttributedString alloc]initWithString:@"2"];
NSAttributedString *atrStr = [[NSAttributedString alloc]initWithString:@"\ndays" attributes:@{NSFontAttributeName : [UIFont fontWithName:@"HelveticaNeue-Bold" size:8]}];
[muAtrStr appendAttributedString:atrStr];
self.lbl.numberOfLines = 0;
[self.lbl setAttributedText:muAtrStr];
Note:- Also put numberOfLines to 0 for allowing any number of lines
注意：- 也将 numberOfLines 设置为 0 以允许任意数量的行
回答by primulaveris
This works in Swift:
这适用于斯威夫特：
let attributedText = NSAttributedString(string: "Happy \nDays")
label.numberOfLines = 0
label.lineBreakMode = .byWordWrapping
label.attributedText = attributedText
