UILabel 自动高度计算

#pragma mark UILabel 自动高度计算

- (
void
) labelAutoHeight:(UILabel *) contentLabel:(NSString *) text {

    
UIFont *font = [UIFont systemFontOfSize:12];

    
contentLabel.font = font;

    
[contentLabel setNumberOfLines:0];

    
contentLabel.lineBreakMode = UILineBreakModeWordWrap;

    
contentLabel.backgroundColor = [UIColor greenColor];

    
contentLabel.tag = 102;

    
CGSize size = CGSizeMake(320,2000);

    
CGSize labelsize = [text sizeWithFont:font constrainedToSize:size lineBreakMode:UILineBreakModeWordWrap];

    
[contentLabel setFrame:CGRectMake(20, 30, 320, labelsize.height)];

}

// 调用方式

<p>

    
[<span>self</span> <span>labelAutoHeight</span>:contentLabel:text];

</p>