在iOS 8中,将UISplitViewController上的preferredDisplayMode设置为PrimaryOverlay会生成以下警告:
"UINavigationController的开始/结束外观转换的不平衡调用"
如果我将preferredDisplayMode设置为AllVisible或根本不设置它,则没有问题.我尝试过的模拟器中的所有iPad和iPhone都出现问题.无论应用程序是纵向还是横向启动,都会出现问题.
这是一些非常简单的代码:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
UITableViewController *tableViewController = [[UITableViewController alloc] init];
UIViewController *viewController = [[UIViewController alloc] init];
UINavigationController *masterNavController = [[UINavigationController alloc] initWithRootViewController:tableViewController];
UINavigationController *detailNavController = [[UINavigationController alloc] initWithRootViewController:viewController];
UISplitViewController *svc = [[UISplitViewController alloc] init];
[svc addChildViewController:masterNavController];
[svc addChildViewController:detailNavController];
//svc.preferredDisplayMode = UISplitViewControllerDisplayModeAllVisible;
svc.preferredDisplayMode = UISplitViewControllerDisplayModePrimaryOverlay;
self.window.rootViewController = svc;
[self.window makeKeyAndVisible];
return YES;
}