如何在boundingRectWithSize中指定NSLineBreakMode？

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

这是新的替代品

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

但是，如何在boundingRectWithSize上指定lineBreakMode参数？

Answer 1

使用NSParagraphStyleAttributeName ＆ NSParagraphStyle ：

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