xcode NSMutableAttributedString 的自动换行
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Word wrap for NSMutableAttributedString
提问by Lollypop
I have NSMutableAttributedString and the string is pretty long. I would like to do word wrap while displaying it on the UIlabel. If it was NSString, i will go ahead and do something like this, Dynamic UILabel truncating the textBut how can i do it with NSAttributedString ? And once it is done, i need to resize the view depending on the label size.
我有 NSMutableAttributedString 并且字符串很长。我想在 UIlabel 上显示时自动换行。如果它是 NSString，我会继续做这样的事情， 动态 UILabel 截断文本但是我怎么能用 NSAttributedString 做到这一点？一旦完成，我需要根据标签大小调整视图大小。
回答by python
The lineBreakMode property isn't deprecated in iOS 6. It has simply changed the names of the constants. The old constants are deprecated, but still available. You can use the new constants even if you are deploying to an older iOS, because the constants are just enum values. The old names and the new names have the same values. So, just set yourlabelname.lineBreakMode = NSLineBreakByTruncatingTail.
lineBreakMode 属性在 iOS 6 中没有被弃用。它只是更改了常量的名称。旧常量已弃用，但仍然可用。即使您部署到较旧的 iOS，您也可以使用新常量，因为这些常量只是枚举值。旧名称和新名称具有相同的值。所以，只需设置 yourlabelname.lineBreakMode = NSLineBreakByTruncatingTail。
NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];
[paragraphStyle setLineBreakMode:NSLineBreakByTruncatingTail];
[attributedStr addAttribute:NSParagraphStyleAttributeName
value:paragraphStyle
range:NSMakeRange(0,[attributedStr length])];
回答by Nishitha
Following also works irrespective of using attributedTextor normal text. Make sure to add the below line after setting the AttributedTextand font to the label.
无论使用attributedText文本还是普通文本，以下内容也都有效。确保在将AttributedText和 字体设置到标签后添加以下行。
label.lineBreakMode = .byTruncatingTail
