ios 修改 label 的行间距

- (void)changeLabelLines {

    NSString * textStr = self.detailLabel.text;

    

    // 调整行间距

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

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

    [paragraphStyle setHeadIndent:15];

    [paragraphStyle setLineSpacing:6];

    [attributedString addAttribute:NSParagraphStyleAttributeName value:paragraphStyle range:NSMakeRange(0, [textStr length])];

    self.detailLabel.attributedText = attributedString;

    [self.detailLabel sizeToFit];

}