Question

有没有办法通过NSNotificationCenter调用关闭TabBarController及其所有childViewControllers的函数？

这不起作用：

@implementation TabBarC

- (void)viewDidLoad {
    [super viewDidLoad];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(signedOut) name:@"SignOut" object:nil];
}

- (void)signedOut
{
    [[NSNotificationCenter defaultCenter] removeObserver:self name:@"SignOut" object:nil];
    [self.tabBarController dismissViewControllerAnimated:YES completion:nil]; // was hoping that this would close everything in 1 shot
}

这使应用程序崩溃了：

- (void)signedOut
{
    NSLog(@"signedout from tabbar");
    [[NSNotificationCenter defaultCenter] removeObserver:self name:@"SignOut" object:nil];
    for (int x = 0; x < self.childViewControllers.count; x++) {
        [[self.childViewControllers objectAtIndex:x] removeFromSuperview];
    }
    [self.tabBarController dismissViewControllerAnimated:YES completion:nil];
}

使用控制台消息：

2015-04-28 17:37:03.815 AppName[65151:6525380] -[UINavigationController removeFromSuperview]: unrecognized selector sent to instance 0x7a7a8cb0
2015-04-28 17:37:03.823 AppName[65151:6525380] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[UINavigationController removeFromSuperview]: unrecognized selector sent to instance 0x7a7a8cb0'

我正在创建的是一个应用程序，其中包含许多嵌入在navigationControllers，ContainerViews和tapBarController中的ViewControllers / TableViewControllers。在用户点击其中一个ViewControllers中的Sign Out后，它应该将所有内容弹回到SignInViewController。

THX！

关闭TabBarController及其所有childViewControllers

0 个答案: