Accessing file stored in "On My iPhone" in iOS Xamarin Application

Question

I need my application to be able to read a file in the "On My iPhone" folder in the files application of an iphone. The file would be downloaded from an email and into that directory. Would it be possible for an iOS application to access the file downloaded from email and into that directory? And if so, I would I go about doing that?

Thank you in advance!

Answer 1

Hello,​

Welcome to our Microsoft Q&A platform!

Yes, you can read it by UIDocumentPickerViewController. Add add following two keys to your Info.plist

   <key>UIFileSharingEnabled</key>  
       <true/>  
       <key>LSSupportsOpeningDocumentsInPlace</key>  
       <true/>  

Here is demo code. I picker the text file, then return the text file's NSUrl

   public partial class ViewController : UIViewController  
       {  
           public ViewController(IntPtr handle) : base(handle)  
           {  
           }  
     
           public override void ViewDidLoad()  
           {  
               base.ViewDidLoad();  
     
               UIButton button = new UIButton() {  
     
                   Frame = new CoreGraphics.CGRect(10, 100, 200, 80),  
                   BackgroundColor = UIColor.LightGray,  
     
             };  
               button.SetTitle("Click", UIControlState.Normal);  
               button.TouchUpInside += Button_TouchUpInside;  
     
               View.AddSubview(button);  
     
               // Perform any additional setup after loading the view, typically from a nib.  
           }  
     
           private void Button_TouchUpInside(object sender, EventArgs e)  
           {  
               string[] strs = {"public.image","public.text", };  
     
               //NSArray arr = NSArray.FromStrings(strs);  
     
               UIDocumentPickerViewController controller = new UIDocumentPickerViewController(strs,UIDocumentPickerMode.Open);  
     
     
               controller.Delegate = new PickerClass();  
     
               UIApplication.SharedApplication.Windows[0].RootViewController.PresentViewController(controller,true,null);  
     
           }  
     
           public override void DidReceiveMemoryWarning()  
           {  
               base.DidReceiveMemoryWarning();  
               // Release any cached data, images, etc that aren't in use.  
           }  
       }  
     
     
       public class PickerClass : UIDocumentPickerDelegate, IUIDocumentInteractionControllerDelegate  
       {  
           public override void DidPickDocument(UIDocumentPickerViewController controller, NSUrl url)  
           {  
     
               var path = url.AbsoluteString;  
     
           }  
       }  

Best Regards,

Leon Lu

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