MFMessageComposeViewController不会出现在iPad上的表单中

Question

如果我在视频控制器的iPad（iOS 8）上运行此代码：

MFMessageComposeViewController *controller = [[[MFMessageComposeViewController alloc]init]autorelease];
controller.modalPresentationStyle = UIModalPresentationFormSheet;
[self presentViewController:controller animated:YES completion:nil];

我获得了全屏消息撰写视图。但我认为MFMessageComposeViewController忽略其模态表示风格的任何地方都没有文档或参考。这是预期的吗？或者我错过了什么？

Answer 1

最近针对iOS8面临类似问题。看起来MFMessageComposeViewController似乎忽略了modalPresentationStyle属性。奇怪的是，MFMailComposeViewController似乎没有这个问题。无论如何，要解决它，我将MFMessageComposeViewController嵌入到UIViewController中并改为呈现。以下是完成此任务的代码：

var messageViewController = MFMessageComposeViewController()
messageViewController.messageComposeDelegate = self

let containerViewController = UIViewController()
containerViewController.view.addSubview(messageViewController.view)
messageViewController.willMoveToParentViewController(nil)
containerViewController.addChildViewController(messageViewController)
messageViewController.didMoveToParentViewController(containerViewController) 

containerViewController.modalPresentationStyle = .OverFullScreen
containerViewController.transitioningDelegate = self
presentViewController(containerViewController, animated: true, completion: nil)