ios – Objective-C中Android的“Spannable”相当于什么

我在一个iOS应用程序,应该能够突出显示文本,并使其可点击.

我在iOS中阅读了约NSAttributedString,但是在android中比Spannable还要复杂.

有没有其他目标c的做法,如果没有;我应该如何使用NSAttributedString来逐句突出显示一个段落,以及如何使我的文本可点击.

更新：

What exactly i want that each word should be clickable and can be
highlighted as a single word in one paragraph.

解决方法

我发现使用UITextView的完美解决方案,它将使UITextView内的每个单词都可以点击.

首先,创建一个UITextView,然后添加一个UITapGestureRecognizer,如下所示：

CGRect textViewFrame = CGRectMake(0,40,100,100);
textView = [[UITextView alloc]initWithFrame: textViewFrame];
textView.textAlignment = NSTextAlignmentCenter;
textView.backgroundColor = [UIColor clearColor];
textView.editable = NO;
textView.selectable = NO;

[self.view addSubView:textView];

// i used to `NSMutableAttributedString` highlight the text

 string = [[NSMutableAttributedString alloc]initWithString:@"Any text to detect A B $& - +"];
    [string addAttribute:NSFontAttributeName
                  value:[UIFont systemFontOfSize:40.0]
                  range:NSMakeRange(0,[string length])];
    NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc]init] ;
    [paragraphStyle setAlignment:NSTextAlignmentCenter];

    [string addAttribute:NSParagraphStyleAttributeName value:paragraphStyle range:NSMakeRange(0,[string length])];

    [textView setAttributedText:string];

UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapRecognized:)];

//modify this number to recognizer number of tap
[singleTap setNumberOfTapsrequired:1];
[textView addGestureRecognizer:singleTap];

然后添加UITapGestureRecognizer @selector：

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

    if(recognizer.state == UIGestureRecognizerStateRecognized)
    {

        CGPoint point = [recognizer locationInView:recognizer.view];
        Nsstring * detectedText = [self getWordAtPosition:point inTextView: textView];

        if (![detectedText isEqualToString:@""]) {

    NSLog(@"detectedText  == %@",detectedText);


        } }

}

所有这些魔法与这个方法有关,女巫可以检测到UITextView上的任何触摸,并获得点击的字：

-(Nsstring*)getWordAtPosition:(CGPoint)pos inTextView:(UITextView*)_tv
{
    //eliminate scroll offset
    pos.y += _tv.contentOffset.y;

    //get location in text from textposition at point
    UITextPosition *tapPos = [_tv closestPositionToPoint:pos];

    //fetch the word at this position (or nil,if not available)
    UITextRange * wr = [_tv.tokenizer rangeEnclosingPosition:tapPos withGranularity:UITextGranularityWord inDirection:UITextLayoutDirectionRight];

    return [_tv textInRange:wr];
}

并突出显示文字：

-(void)setTextHighlited :(Nsstring *)txt{

    for (Nsstring *word in [textView.attributedText componentsSeparatedByString:@" "]) {

        if ([word hasPrefix:txt]) {
            NSRange range=[self.textLabel.text rangeOfString:word];
            [string addAttribute:NSForegroundColorAttributeName value:[UIColor blueColor] range:range];
         }}
    [textView setAttributedText:string];

}

就这样,希望这能帮助别人.