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Ios 如何在boundingRectWithSize中指定NSLineBreakMode？

ios objective-c

Ios 如何在boundingRectWithSize中指定NSLineBreakMode？,ios,objective-c,xcode4.5,Ios,Objective C,Xcode4.5,这是新的替代品 [text boundingRectWithSize:BOLIVIASize options:NSStringDrawingUsesLineFragmentOrigin attributes:@{NSFontAttributeName:FONT} context:nil]; 但是，如何在boundingRectWithSize上指定lineBreakMode参数？使用NSParagraphStyleAttributeName和NSParagraphStyle： - (CGSi

这是新的替代品

 [text boundingRectWithSize:BOLIVIASize options:NSStringDrawingUsesLineFragmentOrigin attributes:@{NSFontAttributeName:FONT} context:nil];
但是，如何在boundingRectWithSize上指定lineBreakMode参数？

使用
NSParagraphStyleAttributeName
和
NSParagraphStyle
：

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