for...in... 循环 处理一组按钮的选中状态变动

for...in...  循环  处理一组按钮的选中状态变动

- (void)buttonAction:(UIButton *)button { 
   
[_indexView removeFromSuperview];  //下面线条移除
[_tabScrollView setContentOffset:CGPointMake(button.tag * _pageWidth, 0) animated:_transitionAnimated];

    //下面两句话更改所有按钮的状态
    for (UIButton *tempButton in _tabButtonArray) {
        if (button.tag != tempButton.tag) {
            [tempButton setSelected:NO];
        }
    }
    [button setSelected:YES];

    if(button.selected)
    {

           _indexView.frame = CGRectMake(0, tabButton.frame.size.height - 2, tabButton.frame.size.width, 2);
           [tabButton addSubview:_indexView];

    }

}