Ios 使用NSMutableAttributedString更改UITextView中的小词（'；）的颜色

我正在使用NSMutableAttributeString在用户键入时更改UITextView中的文本。当用户键入“#HELLO#”或“#TEST#”或“#TEST#”时，这些字符串应为红色（仅为示例）

这几乎适用于所有单词，除了“in”。当我输入时，“in”是黑色而不是白色（

[UIColor-whiteColor]

）。如果我键入“t”，则“#test”中的“t”将变为白色

---

<>我真的很困惑，有人能帮我吗？我认为 EX/<代码>部分应该抓住这些字符串。谢谢。

< p>我尝试了你的代码。我猜问题是你设置的范围。因为它总是一个单词，它设置了那个特定单词第一次出现的颜色属性。无论是hello hello还是in。尝试键入PAR。ticular字符串重复以空格分隔，您将始终获得相同的输出。我对您的代码做了一些更改，您可以在下面看到。请尝试一下

  - (void)textViewDidChange:(UITextView *)textView
    {
        NSString *textViewText = textView.text;
        NSLog(@"Text view Text %@" , textViewText );
        NSMutableAttributedString * string = [[NSMutableAttributedString alloc]initWithString:textViewText];

        NSString *space = @" ";
        NSArray *words =[textView.text componentsSeparatedByString:space];

        for(NSString *word in words){

            NSLog(@"WORD %@" , word);
            if ([word isEqualToString:@"#HELLO#"] || [word isEqualToString:@"#TEST#"] || [word isEqualToString:@"#test#"]) {


                NSRange range = NSMakeRange(0, string.length);
                while(range.location != NSNotFound)
                {
                    range = [[string string] rangeOfString:word options:0 range:range];
                    if(range.location != NSNotFound)
                    {

                        [string addAttribute:NSForegroundColorAttributeName value:[UIColor redColor] range:NSMakeRange(range.location, word.length)];
                        range = NSMakeRange(range.location + range.length, string.length - (range.location + range.length));

                    }

                }



            }
            else{


                NSRange range = NSMakeRange(0,string.length);
                while(range.location != NSNotFound)
                {
                    range = [[string string] rangeOfString:word options:0 range:range];
                    if(range.location != NSNotFound)
                    {

                        [string addAttribute:NSForegroundColorAttributeName value:[UIColor whiteColor] range:range];

                        range = NSMakeRange(range.location + range.length, string.length - (range.location + range.length));



                    }

                }




            }
        }

[string addAttribute:NSFontAttributeName
                   value:[UIFont fontWithName:@"HelveticaNeue-Light" size:20.0]
                   range:NSMakeRange(0, [textView.text length])];

[textView setAttributedText:string];
}

---

下面可能会出现一些问题：

rangeOfString:

只返回第一次出现的情况。因此，如果您有

\HELLO\HELLO\35;

，则只有第一个将被着色。或者，例如，

\HELLO\35;输出（只有第一个输出将为白色）加上，在开始时，使用

NSString*textViewText=textView.AttributeText；`以某种方式不记得默认情况下，如果您有一个

NSAttributedString

，它将把

string

属性保留在它的

文本中。
  - (void)textViewDidChange:(UITextView *)textView
    {
        NSString *textViewText = textView.text;
        NSLog(@"Text view Text %@" , textViewText );
        NSMutableAttributedString * string = [[NSMutableAttributedString alloc]initWithString:textViewText];

        NSString *space = @" ";
        NSArray *words =[textView.text componentsSeparatedByString:space];

        for(NSString *word in words){

            NSLog(@"WORD %@" , word);
            if ([word isEqualToString:@"#HELLO#"] || [word isEqualToString:@"#TEST#"] || [word isEqualToString:@"#test#"]) {


                NSRange range = NSMakeRange(0, string.length);
                while(range.location != NSNotFound)
                {
                    range = [[string string] rangeOfString:word options:0 range:range];
                    if(range.location != NSNotFound)
                    {

                        [string addAttribute:NSForegroundColorAttributeName value:[UIColor redColor] range:NSMakeRange(range.location, word.length)];
                        range = NSMakeRange(range.location + range.length, string.length - (range.location + range.length));

                    }

                }



            }
            else{


                NSRange range = NSMakeRange(0,string.length);
                while(range.location != NSNotFound)
                {
                    range = [[string string] rangeOfString:word options:0 range:range];
                    if(range.location != NSNotFound)
                    {

                        [string addAttribute:NSForegroundColorAttributeName value:[UIColor whiteColor] range:range];

                        range = NSMakeRange(range.location + range.length, string.length - (range.location + range.length));



                    }

                }




            }
        }

[string addAttribute:NSFontAttributeName
                   value:[UIFont fontWithName:@"HelveticaNeue-Light" size:20.0]
                   range:NSMakeRange(0, [textView.text length])];

[textView setAttributedText:string];
}