UISplitViewController 内的 UIPopOverController
我必须在一个 splitController 的左侧显示一个 popOver，我用导航控制器初始化 popOver。但是当我显示 popOver 时，我的应用程序崩溃了。
Impostazioni *settings = [[Impostazioni alloc] initWithStyle:UITableViewStyleGrouped];
settings.title = NSLocalizedString(@"SETTINGS", nil);
settings.contentSizeForViewInPopover = kContentSizeOfPopOver;
UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:settings];
nav.navigationBar.tintColor = kTintColorNavigationBar;
nav.contentSizeForViewInPopover = kContentSizeOfPopOver;
UIPopoverController *popOver = [[UIPopoverController alloc] initWithContentViewController:nav];
[popOver presentPopoverFromBarButtonItem:self.navigationItem.rightBarButtonItem permittedArrowDirections:UIPopoverArrowDirectionDown animated:YES];
这是我的代码。有什么想法吗？
编辑：即使我只设置一个viewController而不是SplitController也会崩溃：/并且使用一个空的ViewController：/
I have to show one popOver inside the left side of one splitController, I initialize the popOver whit an navigationController. But when i show the popOver my app crash.
Impostazioni *settings = [[Impostazioni alloc] initWithStyle:UITableViewStyleGrouped];
settings.title = NSLocalizedString(@"SETTINGS", nil);
settings.contentSizeForViewInPopover = kContentSizeOfPopOver;
UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:settings];
nav.navigationBar.tintColor = kTintColorNavigationBar;
nav.contentSizeForViewInPopover = kContentSizeOfPopOver;
UIPopoverController *popOver = [[UIPopoverController alloc] initWithContentViewController:nav];
[popOver presentPopoverFromBarButtonItem:self.navigationItem.rightBarButtonItem permittedArrowDirections:UIPopoverArrowDirectionDown animated:YES];
This is my code. Any ideas?
EDIT: Crash even if I set only a viewController instead of SplitController :/ And with a empty ViewController :/
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（可能与 Error using UIPopoverController 重复。）
简而言之，您需要保留
UIPopoverController< /code> 不知何故。通过为其定义属性或手动管理引用计数。对于 ARC，后者不是一个选项，因此您需要存储引用。(Possibly duplicate of Error using UIPopoverController.)
In short, you need to retain the
UIPopoverControllersomehow. Either by defining a property for it or by managing the ref count manually. With ARC, the latter is not an option, so you need to store the reference.