使用YYText 自定义文字截断 例如 省略号+全文

 // 1. 创建一个属性文本
    NSMutableAttributedString *text = [[NSMutableAttributedString alloc] initWithString:@"Some Text, blab创建一个属性文本"];
    
    // 2. 为文本设置属性
    text.font = [UIFont boldSystemFontOfSize:20];
    text.color = [UIColor blueColor];

    // 3. 赋值到 YYLabel 或 YYTextView
    YYLabel *label = [YYLabel new];
    label.backgroundColor=[UIColor greenColor];
    label.frame = CGRectMake(10, 100, 300, 50);
    label.attributedText = text;
    self.label=label;
    label.userInteractionEnabled=YES;

 // 截断文字
    NSMutableAttributedString *more = [[NSMutableAttributedString alloc] initWithString:@"···【全文】"];
    __weak typeof(self) _self=self;
    YYTextHighlight *hi = [YYTextHighlight new];
    [hi setColor:[UIColor colorWithRed:0.578 green:0.790 blue:1.000 alpha:1.000]];
    hi.tapAction = ^(UIView *containerView, NSAttributedString *text, NSRange range, CGRect rect) {
        YYLabel *label = _self.label;
        label.width=375-20;
        label.truncationToken=nil;
        NSLog(@"-----%@",text);
    };
    
    [more setColor:[UIColor redColor] range:[more.string rangeOfString:@"【全文】"]];
    [more setTextHighlight:hi range:[more.string rangeOfString:@"【全文】"]];
    more.font = _label.font;
   
    YYLabel *seeMore = [YYLabel new];
    seeMore.attributedText = more;
    [seeMore sizeToFit];
    
    NSAttributedString *truncationToken = [NSAttributedString attachmentStringWithContent:seeMore contentMode:UIViewContentModeCenter attachmentSize:seeMore.size alignToFont:text.font alignment:YYTextVerticalAlignmentCenter];
    _label.truncationToken = truncationToken;
    [self.view addSubview:label];