如何使用 NSMutableAttributedString 在我的 UITextView 中加粗一些单词？

Question

我有一个 UITextView 并且我使用 NSString stringWithFormat 投射了某些我想要加粗的词。

我查看了 Stack Overflow 并尝试关注帖子，但我想我不理解它。

这是我一直在玩的东西：

    NSRange boldedRange = NSMakeRange(0, 4);
    NSString *boldFontName = [[UIFont fontWithName:@"Helvetica-Bold" size:100]fontName];


    NSMutableAttributedString *attrString = [[NSMutableAttributedString alloc] initWithString:self.name];

    [attrString beginEditing];
    [attrString addAttribute:NSFontAttributeName
                       value:boldFontName
                       range:boldedRange];
    [attrString endEditing];

    self.resultsTextView.attributedText = attrString;


    self.resultsTextView.text = [NSString stringWithFormat:@"One day, %@ was taking a walk and saw a %@ boy.  He was %@ a %@.", attrString, self.adjective, self.adverb, self.noun];

Answer 1

你也可以按照下面的方式设置，把字典作为一个整体设置为属性

NSString *strTextView = @"This is some demo Text to set BOLD";

NSRange rangeBold = [strTextView rangeOfString:@"BOLD"];

UIFont *fontText = [UIFont boldSystemFontOfSize:10];
NSDictionary *dictBoldText = [NSDictionary dictionaryWithObjectsAndKeys:fontText, NSFontAttributeName, nil];

NSMutableAttributedString *mutAttrTextViewString = [[NSMutableAttributedString alloc] initWithString:strTextView];
[mutAttrTextViewString setAttributes:dictBoldText range:rangeBold];

[textViewTermsPolicy setAttributedText:mutAttrTextViewString];

Answer 2

使用以下代码在 TextView 中设置属性字符串。

    NSString *infoString =@"I am Kirit Modi from Deesa.";

    NSMutableAttributedString *attString=[[NSMutableAttributedString alloc] initWithString:infoString];

    UIFont *font_regular=[UIFont fontWithName:@"Helvetica" size:20.0f];
    UIFont *font_bold=[UIFont fontWithName:@"Helvetica-Bold" size:20.0f];

    [attString addAttribute:NSFontAttributeName value:font_regular range:NSMakeRange(0, 4)];

    [attString addAttribute:NSFontAttributeName value:font_bold range:NSMakeRange(5, 15)];

    [attString addAttribute:NSFontAttributeName value:font_regular range:NSMakeRange(16, infoString.length - 15 - 1)];

    [self.txtView setAttributedText:attString];

输出：

Answer 3

查看@CrazyYoghurt 对@Bbrame 和@BenoitJadinon 对上一个 SO 问题的改进 3586871 我已经使用它一年多了，效果很好。一个限制：如果同一个字符串在您的原始字符串中出现多次，我认为您不能将其加粗多次。但是如果您愿意，您可以扩展代码来实现它。

Answer 4

如果您还需要从 UITextView 中过滤一些单词并使其成为特定文本的 underline/change 颜色，那么您可以使用以下代码。

在这里，我获取了 Content 字符串中的所有文档文本，并过滤了一些希伯来语的特定文本。

NSMutableAttributedString *aStr = [[NSMutableAttributedString alloc]initWithString:content attributes:nil];
[aStr addAttribute:NSLinkAttributeName value:@"http://www.apple.com" range:[content rangeOfString:@"מדיניות פרטיות"]];
[aStr addAttribute:NSLinkAttributeName value:@"http://www.google.com" range:[content rangeOfString:@"לינק"]];
textview.linkTextAttributes = @{NSUnderlineStyleAttributeName : @(NSUnderlineStyleSingle)};
textview.delegate = (id)self;

//...您可以根据您的自定义颜色

[aStr addAttribute:NSForegroundColorAttributeName value:[UIColor redColor] range:[content rangeOfString:@"מדיניות פרטיות"]];
[aStr addAttribute:NSForegroundColorAttributeName value:[UIColor redColor] range:[content rangeOfString:@"לינק"]];

//在这里您还可以在该文本上添加点击手势。 //点击手势

UITapGestureRecognizer *tapRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tappedTextView:)];
             [textview addGestureRecognizer:tapRecognizer];
             [textview setAttributedText:aStr];
             textview.textAlignment=NSTextAlignmentRight;

//用于获取点击手势中的文本位置

-(void)tappedTextView:(UITapGestureRecognizer *)tapGesture

{
    UITextView *textView = (UITextView *)tapGesture.view;
    CGPoint tapLocation = [tapGesture locationInView:textView];
    UITextPosition *textPosition = [textView closestPositionToPoint:tapLocation];
    NSDictionary *attributes = [textView textStylingAtPosition:textPosition inDirection:UITextStorageDirectionForward];
    NSString *urlStr = attributes[NSLinkAttributeName];
    if (urlStr)

    {
        //[[UIApplication sharedApplication] openURL:[NSURL URLWithString:[NSString stringWithFormat:@"%@",url]]];

        PrivacyViewController *next = [PrivacyViewController new];
        [self.navigationController pushViewController:next animated:YES];
    }
}

如何使用 NSMutableAttributedString 在我的 UITextView 中加粗一些单词？

How to bold some words in my UITextView using NSMutableAttributedString?

ios

objective-c

uitextview

nsattributedstring

nsmutableattributedstring