NSMutableParagraphStyle和NSAttributedString失败了

Question

我正在尝试一个多行NSAttributedString，行距为1.25。

NSMutableParagraphStyle *bodyFormat = [[NSMutableParagraphStyle alloc] init];
bodyFormat.alignment = NSTextAlignmentLeft;
//[bodyFormat setLineSpacing:5];
[bodyFormat setLineBreakMode:NSLineBreakByWordWrapping];
//[bodyFormat setMaximumLineHeight:5];
[bodyFormat setLineHeightMultiple:1.25];





NSMutableAttributedString *desc = [[NSMutableAttributedString alloc] initWithString:@"So why to use Lorem Ipsum and why placeholder text is necessary? Naturally, page designs that are made for text documents must contain some text rather than placeholder dots or something else. Howevr, should they contain a proper English words and sentenses almost every reader will deliberately try to interpret it eventually missing the design itself"];
[desc addAttribute:NSParagraphStyleAttributeName value:bodyFormat range:NSMakeRange(0, desc.length)];





UILabel *description = [[UILabel alloc] initWithFrame:CGRectMake(0,
                                                                 20,
                                                                 300,
                                                                 1000)];

description.lineBreakMode = NSLineBreakByWordWrapping;
[description setAttributedText:desc];
[self.view addSubview:description];

这样就可以生成一行，而换行是无效的。

我做错了什么？

Answer 1

[bodyFormat setLineSpacing:5];

破坏了这种行为。

还设置

description.numberOfLines = 0;

帮助..。(描述是UILabel)