iOS presentViewController View Controller 未完全加载

Question

使用以下代码:

MyModalViewController *mMVC = [[MyModalViewController alloc] init];
UINavigationController *mMNavVC = [[UINavigationController alloc] initWithRootViewController:mMNavVC];
mMNavVC.navigationBar.barStyle = UIBarStyleBlackOpaque;
[[[appdelegate window] rootViewController] presentViewController:mMNavVC animated:YES completion:nil];
[mMVC release];
[mMNavVC release];
//(Yes we are not using ARC yet - kills me)

View 显示但在完全滑到顶部之前不会加载。导航 Controller 确实加载正确，您会看到它一直向上滑动。然而，它只是一个框架。换句话说，当导航 Controller 向上滑动到位时，您可以看到呈现 View Controller - 然后加载 mMVC。

感谢您的帮助!

Answer 1

您的问题是您试图创建一个 UINavigationController 并将其用作 UINavigationController rootviewcontroller。修正这一行:

UINavigationController *mMNavVC = [[UINavigationController alloc] 
initWithRootViewController:mMNavVC];

为此:

MyModalViewController *mMVC = [[MyModalViewController alloc] init];
UINavigationController *mMNavVC = [[UINavigationController alloc]   initWithRootViewController:mMVC];

将在显示模态视图 Controller 之前加载它。