iOS文本标签状气泡

我正试图创建一个气泡出来的文字弯曲半径如下图所示

task = task;
    member_date = member_date;
    comments =comments;
    activity = [[NSMutableAttributedString alloc] initWithString:[NSString stringWithFormat:@"%@ %@ %@", [task capitalizedString]  , member_date , comments]];

    [activity addAttributes:@{
                              NSFontAttributeName: [UIFont fontWithName:@"HelveticaNeue" size:14],
                              NSForegroundColorAttributeName: [UIColor blackColor],
                              }
                      range:NSMakeRange(0, task.length)];

    [activity addAttributes:@{
                              NSFontAttributeName: [UIFont fontWithName:@"HelveticaNeue" size:14],
                              NSForegroundColorAttributeName: [UIColor colorWithRed:102.0f/255.0f green:102.0/255.0f blue:102.0/255.0f alpha:1],
                              }
                      range:NSMakeRange(task.length + 1, member_date.length)];

    [activity addAttributes:@{
                              NSFontAttributeName: [UIFont fontWithName:@"HelveticaNeue" size:14],
                              NSForegroundColorAttributeName:[UIColor colorWithRed:102.0f/255.0f green:102.0/255.0f blue:102.0/255.0f alpha:1],
                              }
                      range:NSMakeRange(activity.string.length - comments.length, comments.length)];
    return activity;

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这是我用以下代码实现的

UILabel *lbl = [[UILabel alloc] initWithFrame:CGRectMake(20, 50, 120, 30)];
[self.view addSubview:lbl];
[lbl setTextAlignment:NSTextAlignmentCenter];
[lbl setText:@"3 Comments"];
[lbl.layer setBorderColor:[[UIColor grayColor] CGColor]];
[lbl.layer setBorderWidth:1.5];
[lbl.layer setCornerRadius:15];

然后我就出去了

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希望我收到了你的要求

我只需要得到椭圆形的评论部分。任务文本周围不会有这个。只将层添加到必要的文本IDNT get u。你能详细说明一下吗？你的视图中可能有n个标签，因为你只想为注释添加气泡角，只为注释添加图层