Question

我需要在UITextView中更改文字颜色。我在选定的文本视图文本上获得NSRange但无法使用此代码更改其颜色。

[mutableAttributedString addAttribute:NSForegroundColorAttributeName value:[UIColor colorWithRed:10.0/255.0 green:15.0/255.0 blue:5.0/255.0 alpha:1.0] range:range1];

有没有办法在文本视图中更改抽头颜色更改？

Answer 1

我希望，这段代码可以帮到你:) 在我的场景中，我通过点击uiButton更改选定的textColor，您可以尝试这种方式。

// When text is tapped or selected by user we can change the

- (IBAction)applyBlueColor:(id)sender {

    // getting textRange
    NSRange textRange = [_textView selectedRange];

    NSDictionary *attributeDictionary = [_textView.textStorage attributesAtIndex:textRange.location
                                                                    effectiveRange:nil];

    if ([attributeDictionary objectForKey:NSForegroundColorAttributeName] == nil ||
        [attributeDictionary objectForKey:NSForegroundColorAttributeName] != [UIColor blackColor]) {
        // Setting blue color to my selected text.
        NSDictionary *colorDictionary = @{NSForegroundColorAttributeName: [UIColor blueColor]};
        [_textView.textStorage beginEditing];
        [_textView.textStorage setAttributes:colorDictionary range:textRange];
        [_textView.textStorage endEditing];
    }

}

Answer 2

你好每个人都发表了我的答案。我希望它对其他人enter code here

有所帮助

-(void)textTapped:(UITapGestureRecognizer *)recognizer
{

NSMutableAttributedString *attributedStringText = [[NSMutableAttributedString alloc]initWithString:txtView.text];

    UITextView *textView = (UITextView *)recognizer.view;
    NSLayoutManager *layoutManager = textView.layoutManager;
    CGPoint location = [recognizer locationInView:textView];
    location.x -= textView.textContainerInset.left;
    location.y -= textView.textContainerInset.top;

    // Get character Index.
    NSInteger characterIndex = [layoutManager characterIndexForPoint:location inTextContainer:textView.textContainer fractionOfDistanceBetweenInsertionPoints:NULL];

    if (characterIndex < textView.textStorage.length)
    {
       // Enumerate string and get word from character index.
        [txtView.text enumerateSubstringsInRange:NSMakeRange(0, textView.textStorage.length)options:NSStringEnumerationByWords usingBlock:^(NSString *substring, NSRange substringRange, NSRange enclosingRange, BOOL *stop) {
                                              if (NSLocationInRange(characterIndex, enclosingRange)) {
                                                  // Do your thing with the word, at range 'enclosingRange'

                                                  //[mutableAttributedString setTextColor:[UIColor redColor] range:NSMakeRange(range.location, [word1 length])];

                                                  // Change color of text.
                                                  //[attributedStringText addAttribute:NSForegroundColorAttributeName value:[UIColor colorWithRed:255.0/255.0 green:0.0/255.0 blue:0.0/255.0 alpha:1.0] range:NSMakeRange(enclosingRange.location,[word1 length])];


                                                  NSLog(@"%@",textView.tintColor);
                                                  NSLog(@"%@",);

                                                  [attributedStringText addAttribute:NSForegroundColorAttributeName value:[UIColor greenColor]  range:NSMakeRange(enclosingRange.location,[word1 length])];

                                                  [textView setAttributedText:attributedStringText];
                                                  *stop = YES;
                                                }
                                          }];
}
}

如何在Textview中更改文本的颜色

2 个答案: