突出显示或下划线字符串中的特定单词 [英] Highlight or Underline Specific Word in a String

问题描述

我想在 NSString 中突出显示或强调一组特定的单词.我能够检测到这些词是否存在，只是无法突出显示它们.

I would like to highlight or underline a specific set of words in a NSString. I am able to detect if the words exist, I'm just not able to get them highlighted.

NSString * wordString = [NSString stringWithFormat:@"%@", [self.myArray componentsJoinedByString:@"\n"]];

self.myLabel.text = wordString;

if ([wordString rangeOfString:@"Base Mix"].location == NSNotFound)
{
    NSLog(@"string does not contain base mix");
}
else
{
    NSLog(@"string contains base mix!");

    NSMutableAttributedString * string = [[NSMutableAttributedString alloc] initWithString:wordString];

    NSString * editedString = [NSString stringWithFormat:@"%lu", (unsigned long)[wordString rangeOfString:@"Base Mix"].location];

    NSRange theRange = NSMakeRange(0, [editedString length]);

    [string beginEditing];
    [string removeAttribute:NSForegroundColorAttributeName range:theRange];
    [string addAttribute:NSForegroundColorAttributeName value:[UIColor greenColor] range:theRange];
    [string endEditing];

    [self.myLabel setAttributedText:string];
}

这段代码更接近正确的路径.我确实看到了一个突出显示的字符，但它是字符串中的第一个字符，而不是我搜索过的字词.

This code is closer to the right path. I do see a highlighted character, but it's the very first character in the string and not the words that I have searched for.

推荐答案

您可以使用 NSUnderlineStyleAttributeName 和 NSUnderlineColorAttributeName 属性.我想你可以这样使用它:

You can use the NSUnderlineStyleAttributeName and NSUnderlineColorAttributeName attributes. I think you can use it like this:

NSRange foundRange = [wordString rangeOfString:@"Base Mix"];
if (foundRange.location != NSNotFound)
{
    [wordString beginEditing];
    [wordString addAttribute:NSUnderlineStyleAttributeName value:[NSNumber numberWithInt:1] range:foundRange];
    [wordString addAttribute:NSUnderlineColorAttributeName value:[NSColor redColor] range:foundRange];
    [wordString endEditing];
}

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