字体之间的行间距

         NSString *testString = @"翻手为云，覆手为雨，金盆洗手止风雨！年少初遇";

        NSMutableAttributedString * attributedString1 = [[NSMutableAttributedString alloc] initWithString:testString];

        NSMutableParagraphStyle * paragraphStyle1 = [[NSMutableParagraphStyle alloc] init];

        [paragraphStyle1 setLineSpacing:5];

        [attributedString1 addAttribute:NSParagraphStyleAttributeName value:paragraphStyle1 range:NSMakeRange(0,           [testString length])];

        [_labText setAttributedText:attributedString1];