切换根视图内存泄漏问题

问题

//通过如下跳转，通过xcode 的debug view hierarchy的工具发现UITransitionView没有移除掉导致当前的控制器没有释放掉
UIStoryboard *storyboard =
                      [UIStoryboard storyboardWithName:kStoryboardName_Main
                                                bundle:nil];
                  UIViewController *mainBoard =
                      [storyboard instantiateViewControllerWithIdentifier:
                                      kStoryboardID_MainTabBarController];
[UIApplication sharedApplication].delegate.window.rootViewController = mainBoard;
[[UIApplication sharedApplication].delegate.window makeKeyAndVisible];

未处理前

解决办法

//通过xcode工具检测到UITransitionView没释放导致当前控制器无法释放 为此要先移除该视图,之后再把导航栏pop掉，最后再切换根视图
for (UIView *subview in [UIApplication sharedApplication].delegate.window.subviews) {
  if ([subview isKindOfClass:NSClassFromString(@"UITransitionView")]) {
    [subview removeFromSuperview];
    }
}

处理之后