循环创建button的button移除问题

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  for (int i = 0; i<= [_addView.subviews count]; i++) {            //[[_addView.subviews objectAtIndex:i] removeFromSuperview];            [[_addView.subviews lastObject] removeFromSuperview];        }

意思是：［_addView.subviews count］查看view中有几个控件

 [[_addView.subviews lastObject] removeFromSuperview];

意思是从最后一个控件开始移除我利用循环来移除的

- (void)btnSender:(UIButton *)sender{       int brandID = 0;    for (UIButton *btn in btnArr) {        if (btn.tag == sender.tag) {                       _imageView.frame = btn.frame;            _imageView.image = [UIImage imageNamed:@"xz"];            _bid = comIDarr[brandID];            [self.addView addSubview:_imageView];            NSInteger num = btn.tag;                        _companyLabel.text = [contentO[0][num -101] objectForKey:@"caption"];                        NSLog(@"btn.tag = %ld",(long)btn.tag);                   } else {                        NSLog(@"dainjiNONONON");                             }                 brandID++;    }    }

button➕tag然后选择它的点击时间有选中之后的imageview的添加在button上面

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