[MonoTouch] SIGSEGV Error when tapping a button?
Nic Wise
nicw at fastchicken.co.nz
Mon Dec 19 04:37:31 EST 2011
Actionsheets are async (As are a lot of things in CocoaTouch), so move
the declaration outside of your method. You may find that some of it's
being GC'ed before you get a chance to use it.
On Mon, Dec 19, 2011 at 06:56, dermotos <me at dermotos.com> wrote:
> I have a UITableView. In the first section of this I have a custom
> UITableViewCell. This cell is loaded from EditorTableCell.xib which was
> created as a View & View Controller in monodevelop, then the view removed in
> Interface Editor and replaced with a UITableViewCell. The view outlet is
> set. I have added 3 items: a text field, and two UIButtons. When I press one
> of the buttons, it executes the below code:
>
> partial void onBtnImageTouchUpInside (NSObject sender)
> {
>
> var actionSheet = new UIActionSheet("") { "Take Photo", "Choose Photo",
> "Cancel"} ;
> actionSheet.Style = UIActionSheetStyle.BlackTranslucent;
> actionSheet.CancelButtonIndex = 2;
> actionSheet.ShowInView(ContainingViewControllerReference.View);
>
> picker = new UIImagePickerController();
> picker.Delegate = new PickerDelegate(this);
>
>
> if(UIImagePickerController.IsCameraDeviceAvailable(UIImagePickerControllerCameraDevice.Front)
> ||
>
> UIImagePickerController.IsCameraDeviceAvailable(UIImagePickerControllerCameraDevice.Rear))
> { //At least one camera device is available:
> actionSheet.Clicked += delegate(object sender2, UIButtonEventArgs e2) {
> switch(e2.ButtonIndex)
> {
> case 0: //Take photo with camera:
> picker.SourceType = UIImagePickerControllerSourceType.Camera;
>
> //Switch to front camera if one is available:
>
> if(UIImagePickerController.IsCameraDeviceAvailable(UIImagePickerControllerCameraDevice.Front))
> picker.CameraDevice = UIImagePickerControllerCameraDevice.Front;
> else
> picker.CameraDevice = UIImagePickerControllerCameraDevice.Rear;
> picker.CameraCaptureMode =
> UIImagePickerControllerCameraCaptureMode.Photo;
> picker.AllowsEditing = true;
>
> ContainingViewControllerReference.PresentModalViewController(picker,true);
>
> break;
>
>
> case 1: //Choose from photo library:
> picker.SourceType = UIImagePickerControllerSourceType.PhotoLibrary;
> picker.AllowsEditing = true;
> //picker.CameraCaptureMode =
> UIImagePickerControllerCameraCaptureMode.Photo;
> //string[] available =
> UIImagePickerController.AvailableMediaTypes(UIImagePickerControllerSourceType.PhotoLibrary);
>
> ContainingViewControllerReference.PresentModalViewController(picker,true);
>
> break;
>
> case 2:
> //Cancelled
> break;
> }
>
>
> } ;
> }
> else //No camera device available (Touch, iPad 1 etc...)
> {
> picker.SourceType = UIImagePickerControllerSourceType.PhotoLibrary;
> picker.AllowsEditing = true;
>
> ContainingViewControllerReference.PresentModalViewController(picker,true);
>
>
> }
> }
>
> Now, this ONLY works if I put a breakpoint around the start of the above
> method. If it runs through without a breakpoint, I hit the below error:
>
> at MonoTouch.UIKit.UIApplication.Main (string[],string,string) <0x0010f>
> at MonoTouch.UIKit.UIApplication.Main (string[]) <0x00023>
> at ApolloApp.Application.Main (string[]) [0x00000] in
> /Users/Dermot/Projects/Apollo/Apollo/Main.cs:15
> at (wrapper runtime-invoke) object.runtime_invoke_dynamic
> (intptr,intptr,intptr,intptr) <0xffffffff>
>
> Native stacktrace:
>
> 0 Apollo 0x00688e18
> mono_handle_native_sigsegv + 456
> 1 Apollo 0x0066e7e4
> mono_sigsegv_signal_handler + 428
> 2 libsystem_c.dylib 0x32c00539 _sigtramp + 48
> 3 UIKit 0x371d59eb -[UIApplication
> sendAction:to:from:forEvent:] + 62
> 4 UIKit 0x371d59a7 -[UIApplication
> sendAction:toTarget:fromSender:forEvent:] + 30
> 5 UIKit 0x371d5985 -[UIControl
> sendAction:to:forEvent:] + 44
> 6 UIKit 0x371d56f5 -[UIControl(Internal)
> _sendActionsForEvents:withEvent:] + 492
> 7 UIKit 0x371d602d -[UIControl
> touchesEnded:withEvent:] + 476
> 8 UIKit 0x371d450f -[UIWindow
> _sendTouchesForEvent:] + 318
> 9 UIKit 0x371d3f01 -[UIWindow sendEvent:] +
> 380
> 10 UIKit 0x371ba4ed -[UIApplication
> sendEvent:] + 356
> 11 UIKit 0x371b9d2d
> _UIApplicationHandleEvent + 5808
> 12 GraphicsServices 0x305ecdf3 PurpleEventCallback +
> 882
> 13 CoreFoundation 0x33de5553
> __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 38
> 14 CoreFoundation 0x33de54f5 __CFRunLoopDoSource1 +
> 140
> 15 CoreFoundation 0x33de4343 __CFRunLoopRun + 1370
> 16 CoreFoundation 0x33d674dd CFRunLoopRunSpecific +
> 300
> 17 CoreFoundation 0x33d673a5 CFRunLoopRunInMode + 104
> 18 GraphicsServices 0x305ebfcd GSEventRunModal + 156
> 19 UIKit 0x371e8743 UIApplicationMain + 1090
> 20 Apollo 0x00233764
> wrapper_managed_to_native_MonoTouch_UIKit_UIApplication_UIApplicationMain_int_string___intptr_intptr
> + 240
> 21 Apollo 0x00205ca8
> MonoTouch_UIKit_UIApplication_Main_string__ + 36
> 22 Apollo 0x000e0648
> ApolloApp_Application_Main_string__ + 128
> 23 Apollo 0x0044fe64
> wrapper_runtime_invoke_object_runtime_invoke_dynamic_intptr_intptr_intptr_intptr
> + 200
> 24 Apollo 0x0066e408 mono_jit_runtime_invoke
> + 2892
> 25 Apollo 0x00766714 mono_runtime_invoke +
> 200
> 26 Apollo 0x0076983c mono_runtime_exec_main +
> 836
> 27 Apollo 0x0076883c mono_runtime_run_main +
> 968
> 28 Apollo 0x006754b8 mono_jit_exec + 244
> 29 Apollo 0x00668820 main + 3928
> 30 Apollo 0x00002988 start + 40
>
> =================================================================
> Got a SIGSEGV while executing native code. This usually indicates
> a fatal error in the mono runtime or one of the native libraries
> used by your application.
> =================================================================
>
>
> Any ideas?!
>
> --
> View this message in context: http://monotouch.2284126.n4.nabble.com/SIGSEGV-Error-when-tapping-a-button-tp4213187p4213187.html
> Sent from the MonoTouch mailing list archive at Nabble.com.
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--
Nic Wise
t. +44 7788 592 806 | @fastchicken | http://www.linkedin.com/in/nicwise
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