设置label行间距

  [_contentLabelsetAttributedText:[selfsetContent:content]];

- (NSMutableAttributedString *)setContent:(NSString *)content

{

    NSMutableAttributedString * attributedString = [[NSMutableAttributedString alloc] initWithString:content];

    NSMutableParagraphStyle * paragraphStyle = [[NSMutableParagraphStyle alloc] init];

    [paragraphStylesetLineSpacing:2.5];//设置行间距

    [attributedStringaddAttribute:NSParagraphStyleAttributeNamevalue:paragraphStylerange:NSMakeRange(0, [contentlength])];

    returnattributedString;

}