Objective c 带有NSMutableAttributedString的NSMutableParagraphStyle

我有一个段落，我正在使用NSMutableParagraphStyle来管理行高。另外，我想更改段落中一个单词的颜色，这是我正在使用的代码，但它只更改了一个单词的颜色（AttributeText为overwrite），我如何修复它？？有什么帮助吗

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

paragraphStyle.lineHeightMultiple = 1.45f;

paragraphStyle.alignment = UITextAlignmentRight;

NSDictionary *ats = @{
                      NSFontAttributeName            : [UIFont fontWithName:@"Helvetica"
                                                                      size:currentSize],
                      NSParagraphStyleAttributeName  : paragraphStyle,

                      };


ayaTxt.attributedText    = [[NSAttributedString alloc] initWithString:ayaTxt.text
                                                             attributes:ats];

NSMutableAttributedString *attrString = [[NSMutableAttributedString alloc]
                                         initWithString:ayaTxt.text];

NSRange range = [[AyatWords objectAtIndex:aya] rangeOfString:@":"];

[attrString addAttribute:NSForegroundColorAttributeName
                   value:[UIColor colorWithRed:(25.0/255.0)
                                         green:(168.0/255.0)
                                          blue:(167.0/255.0)
                                         alpha:1.0]
                   range:NSMakeRange(0, range.location + 1)];

ayaTxt.attributedText = attrString;

谢谢..

我解决了：）

NSMutableAttributedString *as = [[NSMutableAttributedString alloc] initWithString:wordsTxt.text];

NSRange range = [[AyatWords objectAtIndex:aya] rangeOfString:@":"];

NSRange wholeRange = NSMakeRange(0, as.length);

[as addAttribute:NSForegroundColorAttributeName
                   value:[UIColor colorWithRed:(25.0/255.0)
                                         green:(168.0/255.0)
                                          blue:(167.0/255.0)
                                         alpha:1.0]
                   range:NSMakeRange(0, range.location + 1)];

[as addAttribute:NSFontAttributeName value:[UIFont systemFontOfSize:currentSize]
                                     range:wholeRange];

NSMutableParagraphStyle *ps = [[NSParagraphStyle defaultParagraphStyle] mutableCopy];

ps.lineHeightMultiple = 1.45f;

ps.alignment = UITextAlignmentRight;


[as addAttribute:NSParagraphStyleAttributeName value:ps range:wholeRange];

wordsTxt.attributedText = as;