要實現(xiàn)效果如圖：

IMG_3792.PNG

IMG_3793.PNG

核心原理：

先將TextView的linkTextAttributes屬性設(shè)為空值(超鏈接默認(rèn)顏色為藍(lán)色菩鲜，置空后，添加的富文本顏色才會生效)惦积，然后給正文添加超鏈接接校，顏色設(shè)為App字體顏色。再給正文后面追加的展開/收起狮崩，也添加超鏈接蛛勉，富文本顏色設(shè)置為藍(lán)色，借助點(diǎn)擊超鏈接代理方法來判斷你點(diǎn)的是哪個部分睦柴，再通過block實現(xiàn)對應(yīng)的功能诽凌。

注意TextView的初始屬性：

_quickTitleTextV = [[CustomTextView alloc] init];
        _quickTitleTextV.font = UISetting_FONT_S(adjustWidth(16));
        _quickTitleTextV.textColor = MWTextColor1;
        _quickTitleTextV.editable = NO;
        _quickTitleTextV.scrollEnabled = NO;
        _quickTitleTextV.linkTextAttributes = @{};//核心代碼
        _quickTitleTextV.delegate = self;
        [_quickTitleTextV setTextContainerInset:UIEdgeInsetsZero];
        [self.contentView addSubview:_quickTitleTextV];

展開

_quickTitleTextV.text = [NSString stringWithFormat:@"%@...展開", [contentsubstringWithRange:NSMakeRange(0, textNumber)]];
                NSInteger textLength = _quickTitleTextV.text.length;
                NSMutableAttributedString *attributeStr = [[NSMutableAttributedString alloc] initWithString:_quickTitleTextV.text];
                [attributeStr addAttribute:NSLinkAttributeName value:@"http://click" range:NSMakeRange(0, textLength - 2)];//鏈接
                [attributeStr addAttribute:NSLinkAttributeName value:@"http://expand" range:NSMakeRange(textLength - 2, 2)];//鏈接
                [attributeStr addAttribute:NSForegroundColorAttributeName value:MWTextColorBlue range:NSMakeRange(textLength - 2, 2)];
              _quickTitleTextV.attributedText = attributeStr;
                

收起

 _quickTitleTextV.text = [NSString stringWithFormat:@"%@ 收起", content];
            NSInteger textLength = _quickTitleTextV.text.length;
            NSMutableAttributedString *attributeStr = [[NSMutableAttributedString alloc] initWithString:_quickTitleTextV.text];
            [attributeStr addAttribute:NSLinkAttributeName value:@"http://click" range:NSMakeRange(0, textLength - 2)];//鏈接
            [attributeStr addAttribute:NSLinkAttributeName value:@"http://close" range:NSMakeRange(textLength - 2, 2)];//鏈接
            [attributeStr addAttribute:NSForegroundColorAttributeName value:MWTextColorBlue range:NSMakeRange(textLength - 2, 2)];
            
           _quickTitleTextV.attributedText = attributeStr;

textView代理方法

- (BOOL)textView:(UITextView *)textView shouldInteractWithURL:(NSURL *)URL inRange:(NSRange)characterRange {
    if ([URL.absoluteString containsString:@"click"]) {
        if (_textViewDicClickBlock) {
            _textViewDicClickBlock();
        }
        return NO;
    }
    
    _model.isExpand = !_model.isExpand;
    if (_expandBlock) {
        _expandBlock();
    }
    
    return NO;
}