How do I get my Xamarin app running on an iOS device?

Paul Lonsdale 1 Reputation point
2022-02-11T12:15:43.657+00:00

Hi,

Can anyone help me?

I'm developing a Xamarin Forms app in Visual Studio 2022 on a Windows PC. I have VS attached to a MacinCloud Mac and an iPhone connected to the Windows PC.

My app deploys and starts up on the iPhone but when I go to login it crashes.

The line of code it is crashing on is making a call to HttpClient.PostAsync to call back to our API to authenticate.

The error and crash dump are below.

Any ideas?

Thanks,

Paul.

Foundation.MonoTouchException
Message=Objective-C exception thrown. Name: NSMallocException Reason: Failed to grow buffer

Native stack trace:
0 CoreFoundation 0x0000000180a35060 B2D21CFD-378C-36D5-BAF7-3F70599CFEFC + 626784
1 libobjc.A.dylib 0x00000001990a9f54 objc_exception_throw + 60
2 CoreFoundation 0x0000000180b42af0 B2D21CFD-378C-36D5-BAF7-3F70599CFEFC + 1731312
3 CoreFoundation 0x0000000180b3addc B2D21CFD-378C-36D5-BAF7-3F70599CFEFC + 1699292
4 CoreFoundation 0x00000001809cf28c __CFSafelyReallocate + 72
5 Foundation 0x00000001821f6a48 D59C6975-5AF2-37BC-93BE-43B80B4293A5 + 232008
6 Foundation 0x00000001821f26d4 D59C6975-5AF2-37BC-93BE-43B80B4293A5 + 214740
7 Xamarin.PreBuilt.iOS 0x00000001024e9c54 do_icall + 328
8 Xamarin.PreBuilt.iOS 0x00000001024e82e4 do_icall_wrapper + 296
9 Xamarin.PreBuilt.iOS 0x00000001024df1d8 interp_exec_method_full + 2740
10 Xamarin.PreBuilt.iOS 0x00000001024dd768 interp_runtime_invoke + 336
11 Xamarin.PreBuilt.iOS 0x000000010234ae70 mono_jit_runtime_invoke + 900
12 Xamarin.PreBuilt.iOS 0x00000001023f9188 mono_runtime_try_invoke + 156
13 Xamarin.PreBuilt.iOS 0x00000001023faddc mono_runtime_invoke + 100
14 Xamarin.PreBuilt.iOS 0x00000001022613e0 _ZL31native_to_managed_trampoline_11P11objc_objectP13objc_selectorPP11_MonoMethodj + 244
15 Xamarin.PreBuilt.iOS 0x00000001022a7db8 -[UIKit_UIControlEventProxy BridgeSelector] + 44
16 UIKitCore 0x000000018330abf0 8388EB03-002B-3B35-A78A-6A022894292E + 5016560
17 UIKitCore 0x0000000183436a4c 8388EB03-002B-3B35-A78A-6A022894292E + 6244940
18 UIKitCore 0x00000001831b22c8 8388EB03-002B-3B35-A78A-6A022894292E + 3605192
19 UIKitCore 0x000000018324eae0 8388EB03-002B-3B35-A78A-6A022894292E + 4246240
20 UIKitCore 0x00000001834e17c0 8388EB03-002B-3B35-A78A-6A022894292E + 6944704
21 UIKitCore 0x0000000182fa6d40 8388EB03-002B-3B35-A78A-6A022894292E + 1461568
22 UIKitCore 0x0000000182fd98c8 8388EB03-002B-3B35-A78A-6A022894292E + 1669320
23 UIKitCore 0x0000000182fe6a68 8388EB03-002B-3B35-A78A-6A022894292E + 1722984
24 UIKitCore 0x0000000183196318 8388EB03-002B-3B35-A78A-6A022894292E + 3490584
25 UIKitCore 0x0000000182fb9c30 8388EB03-002B-3B35-A78A-6A022894292E + 1539120
26 UIKitCore 0x0000000182faea1c 8388EB03-002B-3B35-A78A-6A022894292E + 1493532
27 UIKitCore 0x0000000182fb3ec8 8388EB03-002B-3B35-A78A-6A022894292E + 1515208
28 CoreFoundation 0x0000000180a57020 B2D21CFD-378C-36D5-BAF7-3F70599CFEFC + 765984
29 CoreFoundation 0x0000000180a67ce0 B2D21CFD-378C-36D5-BAF7-3F70599CFEFC + 834784
30 CoreFoundation 0x00000001809a1fe8 B2D21CFD-378C-36D5-BAF7-3F70599CFEFC + 24552
31 CoreFoundation 0x00000001809a77f4 B2D21CFD-378C-36D5-BAF7-3F70599CFEFC + 47092
32 CoreFoundation 0x00000001809bb3b8 CFRunLoopRunSpecific + 600
33 GraphicsServices 0x000000019c34b38c GSEventRunModal + 164
34 UIKitCore 0x000000018335b6a8 8388EB03-002B-3B35-A78A-6A022894292E + 5346984
35 UIKitCore 0x00000001830da7f4 UIApplicationMain + 2092
36 Xamarin.PreBuilt.iOS 0x00000001024e9bb0 do_icall + 164
37 Xamarin.PreBuilt.iOS 0x00000001024e82e4 do_icall_wrapper + 296
38 Xamarin.PreBuilt.iOS 0x00000001024df1d8 interp_exec_method_full + 2740
39 Xamarin.PreBuilt.iOS 0x00000001024dd768 interp_runtime_invoke + 336
40 Xamarin.PreBuilt.iOS 0x000000010234ae70 mono_jit_runtime_invoke + 900
41 Xamarin.PreBuilt.iOS 0x00000001023f7984 mono_runtime_invoke_checked + 148
42 Xamarin.PreBuilt.iOS 0x00000001023fe000 mono_runtime_try_invoke_array + 1272
43 Xamarin.PreBuilt.iOS 0x00000001023a74f0 ves_icall_InternalInvoke + 1036
44 Xamarin.PreBuilt.iOS 0x00000001023b7780 ves_icall_InternalInvoke_raw + 108
45 Xamarin.PreBuilt.iOS 0x00000001024e9bb0 do_icall + 164
46 Xamarin.PreBuilt.iOS 0x00000001024e82e4 do_icall_wrapper + 296
47 Xamarin.PreBuilt.iOS 0x00000001024df1d8 interp_exec_method_full + 2740
48 Xamarin.PreBuilt.iOS 0x00000001024dd768 interp_runtime_invoke + 336
49 Xamarin.PreBuilt.iOS 0x000000010234ae70 mono_jit_runtime_invoke + 900
50 Xamarin.PreBuilt.iOS 0x00000001023f7984 mono_runtime_invoke_checked + 148
51 Xamarin.PreBuilt.iOS 0x00000001023fcbf8 mono_runtime_exec_main_checked + 128
52 Xamarin.PreBuilt.iOS 0x000000010232f850 mono_jit_exec + 376
53 Xamarin.PreBuilt.iOS 0x00000001024db834 xamarin_main + 1944
54 Xamarin.PreBuilt.iOS 0x00000001022f74f4 main + 76
55 dyld 0x0000000102e71a24 start + 520

Source=Xamarin.iOS
StackTrace:
at ObjCRuntime.Runtime.ThrowNSException (System.IntPtr ns_exception) [0x00000] in /Users/builder/azdo/_work/1/s/xamarin-macios/src/ObjCRuntime/Runtime.cs:449
at ObjCRuntime.Runtime.throw_ns_exception (System.IntPtr exc) [0x00000] in /Users/builder/azdo/_work/1/s/xamarin-macios/runtime/Delegates.generated.cs:392
at (wrapper native-to-managed) ObjCRuntime.Runtime.throw_ns_exception(intptr)

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