UIDocumentInteractionController在iOS6但不在iOS5中工作

Question

我在MonoTouch和iOS6模拟器中使用UIDocumentInteractionController，在iOS6设备上使用我的代码一半工作。然而，它不适用于iOS5模拟器/设备。这是我在示例项目中测试的示例类。

using System; 
using MonoTouch.UIKit; 
using MonoTouch.Foundation; 

namespace DocumentThing 
{ 
    public class MyViewController : UIViewController 
    { 
     UIDocumentInteractionController documentInteractionController1; 
     UIDocumentInteractionController documentInteractionController2; 
     UIBarButtonItem leftButton; 
     UIBarButtonItem rightButton; 

     public MyViewController() 
     { 

     } 

     public override void ViewDidLoad() 
     { 
      View.BackgroundColor = UIColor.White; 

      leftButton = new UIBarButtonItem(UIBarButtonSystemItem.Action, null, null); 
      leftButton.Clicked += delegate(object sender, EventArgs e) 
      { 
       InvokeOnMainThread(delegate { 
        documentInteractionController1 = new UIDocumentInteractionController(); 
        documentInteractionController1.Url = NSUrl.FromFilename(@"testpdf.pdf"); 
        documentInteractionController1.PresentOpenInMenu(View.Frame, View, true); 
       }); 
      }; 
      NavigationItem.LeftBarButtonItem = leftButton; 


      rightButton = new UIBarButtonItem(UIBarButtonSystemItem.Action, null, null); 
      rightButton.Clicked += delegate(object sender, EventArgs e) 
      { 
       InvokeOnMainThread(delegate { 
        documentInteractionController2 = new UIDocumentInteractionController(); 
        documentInteractionController2.Url = NSUrl.FromFilename(@"testpdf.pdf"); 
        documentInteractionController2.PresentOptionsMenu(View.Frame, View, true); 
       }); 
      }; 
      NavigationItem.RightBarButtonItem = rightButton; 
     } 
    } 
} 

的PresentOptionsMenu工作正常，在iOS6的但不是在iOS5中，和PresentOptionInMenu双方的iOS5和iOS6的失败。不确定这是否是iOS5/6 SDK /模拟器的错误，或者是否是MonoTouch中的错误。我不知道如何进一步调试此问题...

建议？

Answer 1

回答我的问题...

你检查，如果你有任何事，打开设备上的PDF具有iOS5的对吗？不要忘记iBooks默认不安装，iOS不认为使用Safari作为PDF阅读器。