我正在尝试在我的应用程序中实现UIKeyCommand快捷方式,并且在大多数情况下,它似乎工作正常。除非我在模态视图中呈现CNContactViewController,它似乎做了一些奇怪的事情:CNContactViewController被解除后,键盘快捷键仍显示在可发现性HUD中但在整个应用程序中停止工作,即使呈现视图控制器手动调用{{ 1)} CNContactViewController被解雇后。
这是来自FirstViewController:
becomeFirstResponder
我使用私有API查看- (void) showCNContacts {
CNContact * contact = [[CNContact alloc] init];
CNContactViewController *createContact = [CNContactViewController viewControllerForNewContact: contact];
createContact.delegate = self;
createContact.allowsActions = NO;
CNContactStore *store = [[CNContactStore alloc] init];
createContact.contactStore = store;
UINavigationController *navigation = [[UINavigationController alloc] initWithRootViewController:createContact];
navigation.modalPresentationStyle = UIModalPresentationPageSheet;
[self presentViewController: navigation animated:YES completion: ^{
NSLog(@"presented CNContactVC - responder = %@", [[[UIApplication sharedApplication] keyWindow] performSelector:@selector(firstResponder)]);
}];
}
- (void)contactViewController:(CNContactViewController *)viewController didCompleteWithContact:(nullable CNContact *)contact {
[viewController dismissViewControllerAnimated:YES completion:^{
[self becomeFirstResponder];
NSLog(@"after dismissing CNContactVC - responder = %@", [[[UIApplication sharedApplication] keyWindow] performSelector:@selector(firstResponder)]);
}];
}
,并正确显示firstResponder
作为第一个响应者。肯定会调用FirstViewController
,canBecomeFirstResponder
方法也是如此。按住Command键会显示可发现性HUD,并显示键盘快捷键。
这显然是Contacts框架的某种错误。只是不知道如何解决这个问题。在keyCommands
或[self becomeFirstResponder]
内拨打dispatch_async
1秒钟无效。很想听听一些想法。
感谢。
答案 0 :(得分:2)
我想到的解决方法是将CNContactViewController推送到导航堆栈,而不是尝试以模态方式呈现它。