如何在boundingRectWithSize中指定NSLineBreakMode？ [英] How to specify NSLineBreakMode in boundingRectWithSize?

问题描述

  [text boundingRectWithSize：BOLIVIASize选项：NSStringDrawingUsesLineFragmentOrigin属性：@ {NSFontAttributeName：FONT} context：nil]; 
  

这是

<$ p的新替代品$ p> - （CGSize）sizeWithFont：（UIFont *）font constrainedToSize：（CGSize）size lineBreakMode：（NSLineBreakMode）lineBreakMode


但是，如何在boundingRectWithSize上指定lineBreakMode参数？

解决方案

使用 NSParagraphStyleAttributeName & NSParagraphStyle ：

  NSMutableParagraphStyle * paragraph = [[NSMutableParagraphStyle alloc] init] ; 
 paragraph.lineBreakMode = NSLineBreakByWordWrapping; //例如。 
 
 CGSize size = [label.text boundingRectWithSize：constrainedSize选项：NSStringDrawingUsesLineFragmentOrigin属性：@ {NSFontAttributeName：label.font，NSParagraphStyleAttributeName：paragraph} context：nil] .size; 
  

 [text boundingRectWithSize:BOLIVIASize options:NSStringDrawingUsesLineFragmentOrigin attributes:@{NSFontAttributeName:FONT} context:nil];

That is the new replacement for

- (CGSize) sizeWithFont:(UIFont *)font constrainedToSize:(CGSize)size lineBreakMode:(NSLineBreakMode) lineBreakMode

However, how do I specify the lineBreakMode parameter on boundingRectWithSize?

解决方案

use NSParagraphStyleAttributeName & NSParagraphStyle:

NSMutableParagraphStyle *paragraph = [[NSMutableParagraphStyle alloc] init];
paragraph.lineBreakMode = NSLineBreakByWordWrapping; //e.g.

CGSize size = [label.text boundingRectWithSize: constrainedSize options:NSStringDrawingUsesLineFragmentOrigin attributes: @{ NSFontAttributeName: label.font, NSParagraphStyleAttributeName: paragraph } context: nil].size;

这篇关于如何在boundingRectWithSize中指定NSLineBreakMode？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！