我有PreviewController
:UIViewController
它用于全屏显示文档,它是UINavigationViewController
的一部分。 也是代表UISplitViewController
。在调用委托方法之前释放UIViewController
当它被推动时,它隐藏了masterView
的UISplitViewController
。 (方法1 - 3 - 2被称为)
当它消失(通过按“后退”按钮),它显示masterView
UISplitViewController
。 (方法4 - 2被称为)
但有一种方法可以强制关闭PreviewController
。在这种情况下,只调用方法4并在UISplitViewController
可以发送消息并调用方法2之前取消分配PreviewController
。
如何解决此问题?有没有办法强制UISplitViewController
调用它的委托方法?或者我可以在方法4中保留PreviewController
,并在方法2(使用ARC)中释放它?
// Method 1
- (void)viewDidLoad
{
[super viewDidLoad];
self.hideMaster = YES;
UISplitViewController *splitViewController = [(AppDelegate *)[[UIApplication sharedApplication] delegate] splitViewController];
splitViewController.delegate = self;
}
// Method 2
- (BOOL)splitViewController:(UISplitViewController *)svc shouldHideViewController:(UIViewController *)vc inOrientation:(UIInterfaceOrientation)orientation
{
return self.hideMaster;
}
// Method 3
- (void)viewWillAppear:(BOOL)animated
{
self.hideMaster = YES;
UISplitViewController *splitViewController = [(AppDelegate *)[[UIApplication sharedApplication] delegate] splitViewController];
[splitViewController.view setNeedsLayout];
[splitViewController willRotateToInterfaceOrientation:self.interfaceOrientation duration:0];
}
// Method 4
- (void)viewWillDisappear:(BOOL)animated
{
self.hideMaster = NO;
UISplitViewController *splitViewController = [(AppDelegate *)[[UIApplication sharedApplication] delegate] splitViewController];
[splitViewController.view setNeedsLayout];
[splitViewController willRotateToInterfaceOrientation:self.interfaceOrientation duration:0];
}
// PreviewController is created in UIViewController which belongs to UINavigationController
PreviewController *previewVC = [[PreviewController alloc] initWithNibName:@"PreviewController" bundle:nil];
previewVC.documentURL = url;
[self.navigationController pushViewController:previewVC animated:YES]
您的PreviewController实例在哪里创建?你可以发布代码吗? – Leijonien
在问题部分添加了此信息。 – GxocT