ios归因于字符串未对齐

Question

我正在开发一个应用程序，其中我将部分文本对齐到左边，而其他部分对齐在同一行上

以下是我的代码：

    //text is "abc\n"
    NSString *dateAndText = [text stringByAppendingString:[NSString stringWithFormat:@" %@",strDate]];
        dateAndText = [dateAndText stringByReplacingOccurrencesOfString:@"\n" withString:@" "];

        CGSize size = [dateAndText sizeWithFont:font constrainedToSize:CGSizeMake(220, 9999) lineBreakMode:NSLineBreakByWordWrapping];

        UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, size.width, size.height)];
        label.numberOfLines = 0;
        label.lineBreakMode = NSLineBreakByWordWrapping;
        label.textAlignment = NSTextAlignmentLeft;

     NSRange range = [dateAndText rangeOfString:[dateAndText substringFromIndex:text.length]];
        NSMutableAttributedString *string = [[NSMutableAttributedString alloc] initWithString:dateAndText];
        [string addAttribute:NSFontAttributeName value:[UIFont italicSystemFontOfSize:10.0 ] range:NSMakeRange(range.location,range.length)];

        NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc]init] ;
        [paragraphStyle setAlignment:NSTextAlignmentRight];

        [string addAttribute:NSParagraphStyleAttributeName value:paragraphStyle range:NSMakeRange(range.location,range.length)];
label.attributedText = string;

归因字符串未在同一行上对齐。如果我在代码中的任何地方出错，请有人帮助我

输出应如下图所示

Answer 1

使用paragraphStyle.lineHeightMultiple = 0.001;解决了我的问题。