显示abpeoplePickerNavigationController时隐藏选项卡?

我有以下代码来设置和切换到abpeoplePickerNavigationController。

    ABPeoplePickerNavigationController *peoplePicker = [
        [ABPeoplePickerNavigationController alloc] init
    ];
    peoplePicker.peoplePickerDelegate = self;

    window = [[[currentView superview] superview] superview];       
    [window addSubview:[peoplePicker view]];
    [[[peoplePicker view] layer] addAnimation:animation forKey:@"nav"];

它从中切换的视图由一个UITabbarController控制。当PeoplePicker是活动视图时,我会阻止选项卡显示,但到目前为止我还没有任何运气。我已经研究过hidesbottombarwhenpushed,但是由于我不能推动导航控制器,它没有帮助。我还能做什么?