ios - 以编程方式切换 TabBarController 视图时未调用 ViewDidAppear

Question

我正在以编程方式从模态视图控制器切换 TabBarController 视图（请参阅此问题）。委托正确地切换选项卡，但viewDidAppear没有在新呈现的选项卡中被调用。有没有办法强制 viewDidAppear 被调用？还是我做错了什么？

Answer 1

终于弄明白了——这是因为我在关闭模式视图之前调用了选项卡开关。一旦我切换了订单，它就可以正常工作。

Answer 2

强制调用viewDidAppear；

- (void)viewController:(YourViewControllerSubclass *)viewController isBeingDismissedWithImage:(BOOL)imageTaken {
  // Select the tabbar index (which is the second controller)
  [secondController viewDidAppear:YES];
}

Answer 3

I had the same issue before. In my TabBarViewController's viewDidLoad(), I selected other tab programatically as selectedIndex = 3. The target viewController's viewDidAppear() isn't called. But if I move selectedIndex = 3 from viewDidLoad() to viewDidAppear(), the problem is solved.