UILabel的行间距

 UILabel *label = [[UILabel alloc] initWithFrame:labelFrame];         
 [label setBackgroundColor:[UIColor clearColor]];         
 [label setTextColor:textColor];         
 [label setNumberOfLines:0];         
 label.font = textFont;         
 NSString *labelText = @"我是内容，我是内容，我是内容，我是内容，我是内容。";                  
 NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:labelText];         
 NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];                  
 [paragraphStyle setLineSpacing:LINESPACE];//调整行间距                 
 [attributedString addAttribute:NSParagraphStyleAttributeName value:paragraphStyle range:NSMakeRange(0, [labelText length])];         
 label.attributedText = attributedString;         

 [contentView addSubview:label];        
 [label sizeToFit];