Question

我有ContainerView和三个按钮，如tab。点按按钮我想将ViewControllers切换到UIContainerView。当点击按钮App崩溃时，这是我的代码。

- (void) cycleFromViewController: (UIViewController*) oldVC  toViewController: (UIViewController*) newVC{
  [oldVC willMoveToParentViewController:nil];
  [self addChildViewController:newVC];
    [self transitionFromViewController:oldVC toViewController:newVC duration:5 options:0 animations:^{
        newVC.view.frame = oldVC.view.frame;

    } completion:^(BOOL finished) {
        [oldVC removeFromParentViewController];
        [newVC didMoveToParentViewController:self];
        currentVC = newVC;
    }];

}

*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Children view controllers <FirstViewController: 0x78e98580> and <ThirdViewController: 0x78e99a60> must have a common parent view controller when calling -[UIViewController transitionFromViewController:toViewController:duration:options:animations:completion:]'

Answer 1

错误本身就是指出问题

＆＃39;儿童查看控制器和必须有一个共同的父视图调用时的控制器 - [UIViewController transitionFromViewController：toViewController：持续时间：选择：动画：完成：]＆＃39;

只需确保您尝试切换的VC属于父级

的容器

应用程序在ContainerView中切换ViewControllers时终止

1 个答案: