IOS，UISplitView中的隐藏列表

Question

这是有效的，但只需点击两下即可获得详情视图以填充屏幕。有什么想法吗？

- (void)toggleSidebar
{
    NSLog(@"HELLO");

    UINavigationController *navController;
    CatalogViewController *viewController;

    for (UIViewController * iview in [self viewControllers]){
        if ([iview class] == [UINavigationController class]) {
            navController = (UINavigationController *)iview;
        } else {
            viewController = (CatalogViewController *)iview;
        }
    }

    if (navController != nil) {
      [[navController view] removeFromSuperview];
    }

    if (viewController != nil) {

        [[viewController view] removeFromSuperview];
        [[self view] setAutoresizesSubviews:YES];

        [[[self view] superview] addSubview:[viewController view]];
        [[viewController view] setFrame:CGRectMake(0, 0, self.view.superview.frame.size.width, self.view.superview.frame.size.height)];
    }
}

基本上我希望拆分视图在我点击按钮时隐藏列表。