Xamarin.IOS: UITableViewSource treo trên thiết bị

Question

tôi đã là một ứng dụng rất đơn giản, trong đó có chỉ UITableView và nó UITableViewSource ..

Khi sử dụng UITableView mà không liên kết đến UITableViewSource (ứng dụng công trình mô phỏng & thiết bị)

nhưng khi tôi liên kết UITableView đến UITableViewSource (ứng dụng công trình mô phỏng nhưng tai nạn trên thiết bị)

(Thiết bị này là iPad chạy iOS 9.2.1)

nó mang lại cho tôi lỗi dài này:

2016-02-08 05:16:02.913 secondApp[4487:1711787] critical: Stacktrace: 

2016-02-08 05:16:02.913 secondApp[4487:1711787] critical: at <unknown> <0xffffffff> 
2016-02-08 05:16:02.915 secondApp[4487:1711787] critical: at (wrapper managed-to-native) UIKit.UIApplication.UIApplicationMain (int,string[],intptr,intptr) <0xffffffff> 
2016-02-08 05:16:02.915 secondApp[4487:1711787] critical: at UIKit.UIApplication.Main (string[],intptr,intptr) [0x00005] in /Users/builder/data/lanes/2689/962a0506/source/maccore/src/UIKit/UIApplication.cs:77 
2016-02-08 05:16:02.916 secondApp[4487:1711787] critical: at UIKit.UIApplication.Main (string[],string,string) [0x0001c] in /Users/builder/data/lanes/2689/962a0506/source/maccore/src/UIKit/UIApplication.cs:60 
2016-02-08 05:16:02.916 secondApp[4487:1711787] critical: at secondApp.Application.Main (string[]) [0x00008] in /Users/Mujtaba/Desktop/XamarinProjects/secondApp/secondApp/Main.cs:12 
2016-02-08 05:16:02.917 secondApp[4487:1711787] critical: at (wrapper runtime-invoke) object.runtime_invoke_dynamic (intptr,intptr,intptr,intptr) <0xffffffff> 
2016-02-08 05:16:02.917 secondApp[4487:1711787] critical: 
Native stacktrace: 

2016-02-08 05:16:02.982 secondApp[4487:1711787] critical: 0 secondApp       0x0027ffb5 mono_handle_native_sigsegv + 240 
2016-02-08 05:16:02.982 secondApp[4487:1711787] critical: 1 secondApp       0x00286243 mono_sigsegv_signal_handler + 226 
2016-02-08 05:16:02.983 secondApp[4487:1711787] critical: 2 libsystem_platform.dylib   0x20f3385f _sigtramp + 42 
2016-02-08 05:16:02.983 secondApp[4487:1711787] critical: 3 secondApp       0x00323310 xamarin_stret_trampoline + 96 
2016-02-08 05:16:02.984 secondApp[4487:1711787] critical: 4 UIKit        0x25479d29 <redacted> + 2976 
2016-02-08 05:16:02.984 secondApp[4487:1711787] critical: 5 UIKit        0x2547907b <redacted> + 378 
2016-02-08 05:16:02.984 secondApp[4487:1711787] critical: 6 UIKit        0x25478e2d <redacted> + 56 
2016-02-08 05:16:02.985 secondApp[4487:1711787] critical: 7 UIKit        0x25478c33 <redacted> + 314 
2016-02-08 05:16:02.985 secondApp[4487:1711787] critical: 8 UIKit        0x256d4293 <redacted> + 42 
2016-02-08 05:16:02.985 secondApp[4487:1711787] critical: 9 UIKit        0x2547f295 <redacted> + 128 
2016-02-08 05:16:02.986 secondApp[4487:1711787] critical: 10 UIKit        0x25391369 <redacted> + 1480 
2016-02-08 05:16:02.986 secondApp[4487:1711787] critical: 11 UIKit        0x253b5fd5 <redacted> + 68 
2016-02-08 05:16:02.986 secondApp[4487:1711787] critical: 12 UIKit        0x253910ab <redacted> + 778 
2016-02-08 05:16:02.987 secondApp[4487:1711787] critical: 13 UIKit        0x253907ed <redacted> + 124 
2016-02-08 05:16:02.987 secondApp[4487:1711787] critical: 14 UIKit        0x2539069b <redacted> + 426 
2016-02-08 05:16:02.987 secondApp[4487:1711787] critical: 15 UIKit        0x2539d713 <redacted> + 1658 
2016-02-08 05:16:02.987 secondApp[4487:1711787] critical: 16 UIKit        0x2539d08f <redacted> + 30 
2016-02-08 05:16:02.988 secondApp[4487:1711787] critical: 17 UIKit        0x2539c87d <redacted> + 496 
2016-02-08 05:16:02.988 secondApp[4487:1711787] critical: 18 UIKit        0x25399bf3 <redacted> + 278 
2016-02-08 05:16:02.988 secondApp[4487:1711787] critical: 19 UIKit        0x2540e915 <redacted> + 48 
2016-02-08 05:16:02.989 secondApp[4487:1711787] critical: 20 UIKit        0x2563311d <redacted> + 3320 
2016-02-08 05:16:02.989 secondApp[4487:1711787] critical: 21 UIKit        0x25636f0f <redacted> + 1570 
2016-02-08 05:16:02.989 secondApp[4487:1711787] critical: 22 UIKit        0x2564ac15 <redacted> + 36 
2016-02-08 05:16:02.989 secondApp[4487:1711787] critical: 23 UIKit        0x256343f7 <redacted> + 134 
2016-02-08 05:16:02.990 secondApp[4487:1711787] critical: 24 FrontBoardServices     0x2250fc75 <redacted> + 232 
2016-02-08 05:16:02.990 secondApp[4487:1711787] critical: 25 FrontBoardServices     0x2250ff61 <redacted> + 44 
2016-02-08 05:16:02.990 secondApp[4487:1711787] critical: 26 CoreFoundation      0x211c1257 <redacted> + 14 
2016-02-08 05:16:02.990 secondApp[4487:1711787] critical: 27 CoreFoundation      0x211c0e47 <redacted> + 454 
2016-02-08 05:16:02.990 secondApp[4487:1711787] critical: 28 CoreFoundation      0x211bf1af <redacted> + 806 
2016-02-08 05:16:02.991 secondApp[4487:1711787] critical: 29 CoreFoundation      0x21111bb9 CFRunLoopRunSpecific + 516 
2016-02-08 05:16:02.991 secondApp[4487:1711787] critical: 30 CoreFoundation      0x211119ad CFRunLoopRunInMode + 108 
2016-02-08 05:16:02.991 secondApp[4487:1711787] critical: 31 UIKit        0x25403a17 <redacted> + 526 
2016-02-08 05:16:02.991 secondApp[4487:1711787] critical: 32 UIKit        0x253fdfb5 UIApplicationMain + 144 
2016-02-08 05:16:02.992 secondApp[4487:1711787] critical: 33 secondApp       0x000f4044 wrapper_managed_to_native_UIKit_UIApplication_UIApplicationMain_int_string___intptr_intptr + 272 
2016-02-08 05:16:02.992 secondApp[4487:1711787] critical: 34 secondApp       0x000bd130 UIKit_UIApplication_Main_string___intptr_intptr + 52 
2016-02-08 05:16:02.992 secondApp[4487:1711787] critical: 35 secondApp       0x000bd0f0 UIKit_UIApplication_Main_string___string_string + 204 
2016-02-08 05:16:02.992 secondApp[4487:1711787] critical: 36 secondApp       0x000b714c secondApp_Application_Main_string__ + 188 
2016-02-08 05:16:02.992 secondApp[4487:1711787] critical: 37 secondApp       0x002101b4 wrapper_runtime_invoke_object_runtime_invoke_dynamic_intptr_intptr_intptr_intptr + 256 
2016-02-08 05:16:02.993 secondApp[4487:1711787] critical: 38 secondApp       0x0028888f mono_jit_runtime_invoke + 1150 
2016-02-08 05:16:02.993 secondApp[4487:1711787] critical: 39 secondApp       0x002c71f5 mono_runtime_invoke + 88 
2016-02-08 05:16:02.993 secondApp[4487:1711787] critical: 40 secondApp       0x002ca64b mono_runtime_exec_main + 282 
2016-02-08 05:16:02.993 secondApp[4487:1711787] critical: 41 secondApp       0x00332fa4 xamarin_main + 2072 
2016-02-08 05:16:02.994 secondApp[4487:1711787] critical: 42 secondApp       0x0025aac5 main + 112 
2016-02-08 05:16:02.994 secondApp[4487:1711787] critical: 43 libdyld.dylib      0x20dc4873 <redacted> + 2 
2016-02-08 05:16:02.994 secondApp[4487:1711787] critical: 
================================================================= 
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. 
================================================================= 

Tất cả các dự án của tôi chỉ chứa 2 lượt xem :)

ViewController .cs:

using System; 
using UIKit; 

namespace secondApp 
{ 
    public partial class ViewController : UIViewController 
    { 
     public ViewController (IntPtr handle) : base (handle) 
     { 
     } 

     public override void ViewDidLoad() 
     { 
      base.ViewDidLoad(); 

      string[] list = new string[]{"Red", "Blue", "Brown", "Green" }; 

      UITableView table = new UITableView { 
       Frame = new CoreGraphics.CGRect (0, 0, View.Bounds.Width, View.Bounds.Height), 

       Source = new myTableSource(list) // the problem happens when I add this line 
      }; 

      View.AddSubview (table); 

     } 

     public override void DidReceiveMemoryWarning() 
     { 
      base.DidReceiveMemoryWarning(); 
     } 
    } 
} 

và myTableSource.cs:

using System; 
using UIKit; 

namespace secondApp 
{ 
    public class myTableSource : UITableViewSource 
    { 
     string[] TableItems; 
     string CellIdentifier = "TableCell"; 

     public myTableSource (string[] items) 
     { 
      TableItems = items; 
     } 

     public override nint RowsInSection (UITableView tableview, nint section) 
     { 
      return TableItems.Length; 
     } 

     public override UITableViewCell GetCell (UITableView tableView, Foundation.NSIndexPath indexPath) 
     { 
      UITableViewCell cell = tableView.DequeueReusableCell (CellIdentifier); 
      string item = TableItems[indexPath.Row]; 

      if (cell == null){ 
       cell = new UITableViewCell (UITableViewCellStyle.Default, CellIdentifier); 
      } 

      cell.TextLabel.Text = item; 

      return cell; 
     } 
    } 
} 

Hope có một giải pháp đơn giản cho lỗi này, bởi vì tôi vẫn còn ở bước đầu tiên trong việc học Xamarin

Thanks in advance ..

Answer 1

Sau gần một tuần, sự cố đã xảy ra, giải pháp tương tự hoạt động hoàn hảo trên cùng một thiết bị ...

Tôi chỉ làm Build -> Clean All .. có thể nó đã giải quyết được vấn đề, hoặc có thể là vấn đề đã được giải quyết bằng cách chỉ cần chờ đợi cho một tuần