c# - Xamarin:libmonosgen-2.0.dylib:MCNearbyServiceAdvertiser 上缺少所需的代码签名

Question

我正在使用 a working code-only approach 中的 MultiPeer 框架并将其移动到 into a MVVM structure 并得到以下异常。

我在两台不同的电脑上使用 Mac OS High Sierra，每台电脑都有 iPhone running my MVVM instance.

我仔细检查了纯代码方法，甚至在一个实例中使用了属性(而不是字段)。这似乎是 Xamarin 绑定(bind)或链接器问题。

NearbyDevicesViewController.cs/MCNearbyServiceAdvertiser - 损坏

public partial class NearbyDevicesViewController : UITableViewController
{
    public string myPhoneName { get; set; }
    public  MCPeerID myPeerID { get; set; }
    public const string SERVICE_STRING = "AELP";
    public MCSession Session { get; set; }

    List<PeerMonitorStatus> CachedPeerStatus = new List<PeerMonitorStatus>();

    public NearbyDevicesViewController (IntPtr handle) : base (handle)
    {
        myPhoneName = "A" + UIKit.UIDevice.CurrentDevice.Name; // Adding A prefix incase numeric isn't allowed (it's a problem in Windows NETBIOS... so maybe also here?)
        MyPhoneStatus.MyPeerID =  myPhoneName;
        myPeerID = new MCPeerID(myPhoneName);

        Session = new MCSession(myPeerID);
        Session.Delegate = new ChatSessionDelegate(Session);
        //--------------------------------Advertiser----------------------------------------------------
        var emptyDict = new NSDictionary();
        AppDelegate.advertiser = new MCNearbyServiceAdvertiser(myPeerID, emptyDict, SERVICE_STRING);
        AppDelegate.advertiser.Delegate = new MyNearbyAdvertiserDelegate(this);

        System.Diagnostics.Debug.WriteLine("Starting advertising...");
        AppDelegate.advertiser.StartAdvertisingPeer();
        MyPhoneStatus.IsAdvertising = true;

        ////--------------------------------Browser------------------------------------------------------
        //AppDelegate.browser = new MCNearbyServiceBrowser(myPeerID, SERVICE_STRING);
        //AppDelegate.browser.Delegate = new MyBrowserDelegate(myPeerID, Session);

        //System.Diagnostics.Debug.WriteLine("Starting browsing...");
        //AppDelegate.browser.StartBrowsingForPeers();
        //MyPhoneStatus.IsBrowsing = true;

        CachedPeerStatus.AddRange(AppDelegate.PeerHistoryMonitor.Values);
    }

    public override nint RowsInSection(UITableView tableView, nint section)
    {
        return CachedPeerStatus.Count;
    }

    public override UITableViewCell GetCell(UITableView tableView, NSIndexPath indexPath)
    {
        UITableViewCell cell = new UITableViewCell(CGRect.Empty);
        var item = CachedPeerStatus[indexPath.Row];

        cell.TextLabel.Text = item.DisplayText;
        return cell;
    }
}

AdvertiserController/MCNearbyServiceAdvertiser - 工作

public class AdvertiserController : DiscoveryViewController
{
    MCNearbyServiceAdvertiser advertiser;

    public AdvertiserController(string peerID) : base(peerID)
    {
    }

    public override void DidReceiveMemoryWarning()
    {
        // Releases the view if it doesn't have a superview.
        base.DidReceiveMemoryWarning();

        // Release any cached data, images, etc that aren't in use.
    }

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

        View = new DiscoveryView("Advertiser", this);
        var emptyDict = new NSDictionary();
        Status("Starting advertising...");

        advertiser = new MCNearbyServiceAdvertiser(PeerID, emptyDict, SERVICE_STRING);
        advertiser.Delegate = new MyNearbyAdvertiserDelegate(this);
        advertiser.StartAdvertisingPeer();
    }
}

MyNearbyAdvertiserDelegate.cs - 已损坏

public  class MyNearbyAdvertiserDelegate : MCNearbyServiceAdvertiserDelegate
{
    MCSession session;

    public MyNearbyAdvertiserDelegate(NearbyDevicesViewController session)
    {
        this.session = session.Session;
    }

    public override void DidReceiveInvitationFromPeer(MCNearbyServiceAdvertiser advertiser, MCPeerID peerID, NSData context, MCNearbyServiceAdvertiserInvitationHandler invitationHandler)
    {
        System.Diagnostics.Debug.WriteLine("Advertiser [" + session.MyPeerID.GetNativeHash() + "] will accept invite from " + peerID.DisplayName + " [" + peerID.GetNativeHash() + "]");

        MyPhoneStatus.LastInvitation = DateTime.UtcNow;

        MyPhoneStatus.ConnectedPeers.Clear();
        MyPhoneStatus.ConnectedPeers.AddRange(session.ConnectedPeers);

        invitationHandler(true, session); 
    }
}

MyNearbyAdvertiserDelegate - 工作

class MyNearbyAdvertiserDelegate : MCNearbyServiceAdvertiserDelegate
{
    AdvertiserController parent;

    public MyNearbyAdvertiserDelegate(AdvertiserController parent)
    {
        this.parent = parent;
    }

    public override void DidReceiveInvitationFromPeer(MCNearbyServiceAdvertiser advertiser, MCPeerID peerID, NSData context, MCNearbyServiceAdvertiserInvitationHandler invitationHandler)
    {
        parent.Status("Received Invite");
        invitationHandler(true, parent.Session);
    }
}

测试环境

我有两个 Mac+iPhone 硬件组合。无论哪台机器是广告商，都会出现此问题。如果代码作为服务器或浏览器运行，则需要在 NearbyDevicesViewController 中进行手动配置。

当服务器通过 MCNearbyServiceAdvertiserDelegate 收到邀请时，广告商崩溃，出现以下异常

Visual Studio 输出

Launched application 'net.agent7.AELP-MP' on '73' with pid 677
Loaded assembly: /private/var/containers/Bundle/Application/D2774A07-619E-44C5-9137-526686F6769C/AELPMP.app/Xamarin.iOS.dll [External]
Thread started:  #2
Loaded assembly: /private/var/containers/Bundle/Application/D2774A07-619E-44C5-9137-526686F6769C/AELPMP.app/System.dll [External]
Loaded assembly: /private/var/containers/Bundle/Application/D2774A07-619E-44C5-9137-526686F6769C/AELPMP.app/AELPMP.exe
Resolved pending breakpoint at 'ChatSessionDelegate.cs:18,1' to void AELPMP.ChatSessionDelegate.DidChangeState (MultipeerConnectivity.MCSession session, MultipeerConnectivity.MCPeerID peerID, MultipeerConnectivity.MCSessionState state) [0x00001].
Resolved pending breakpoint at 'ChatSessionDelegate.cs:25,46' to void AELPMP.ChatSessionDelegate.DidChangeState (MultipeerConnectivity.MCSession session, MultipeerConnectivity.MCPeerID peerID, MultipeerConnectivity.MCSessionState state) [0x00069].
Resolved pending breakpoint at 'MyNearbyAdvertiserDelegate.cs:18,1' to void AELPMP.MyNearbyAdvertiserDelegate.DidReceiveInvitationFromPeer (MultipeerConnectivity.MCNearbyServiceAdvertiser advertiser, MultipeerConnectivity.MCPeerID peerID, Foundation.NSData context, MultipeerConnectivity.MCNearbyServiceAdvertiserInvitationHandler invitationHandler) [0x00000].
Resolved pending breakpoint at 'MyNearbyAdvertiserDelegate.cs:14,1' to void AELPMP.MyNearbyAdvertiserDelegate..ctor (AELPMP.NearbyDevicesViewController session) [0x00008].
Starting advertising...
2018-03-14 17:14:35.852 AELPMP[677:249758] critical: Stacktrace:

2018-03-14 17:14:35.852 AELPMP[677:249758] critical:   at <unknown> <0xffffffff>
2018-03-14 17:14:35.853 AELPMP[677:249758] critical:   at (wrapper managed-to-native) UIKit.UIApplication.UIApplicationMain (int,string[],intptr,intptr) <0x00007>
2018-03-14 17:14:35.854 AELPMP[677:249758] critical:   at UIKit.UIApplication.Main (string[],intptr,intptr) [0x00005] in /Library/Frameworks/Xamarin.iOS.framework/Versions/11.10.0.15/src/Xamarin.iOS/UIKit/UIApplication.cs:79
2018-03-14 17:14:35.855 AELPMP[677:249758] critical:   at UIKit.UIApplication.Main (string[],string,string) [0x0002c] in /Library/Frameworks/Xamarin.iOS.framework/Versions/11.10.0.15/src/Xamarin.iOS/UIKit/UIApplication.cs:63
2018-03-14 17:14:35.855 AELPMP[677:249758] critical:   at AELPMP.Application.Main (string[]) [0x00001] in /Users/lamont/Downloads/AELPMP/Main.cs:12
2018-03-14 17:14:35.856 AELPMP[677:249758] critical:   at (wrapper runtime-invoke) object.runtime_invoke_dynamic (intptr,intptr,intptr,intptr) [0x0001e] in <0a8ff55fca4d4370bf8503724a39a15f#C25D3657-4A8E-C9A0-B325-6976392E2CBB>:0
2018-03-14 17:14:35.857 AELPMP[677:249758] critical: 
Native stacktrace:

2018-03-14 17:14:35.891 AELPMP[677:249758] critical:    0   libmonosgen-2.0.dylib               0x0000000101200664 mono_handle_native_crash + 224
2018-03-14 17:14:35.892 AELPMP[677:249758] critical:    1   libmonosgen-2.0.dylib               0x000000010120d394 mono_sigsegv_signal_handler + 316
2018-03-14 17:14:35.892 AELPMP[677:249758] critical:    2   libsystem_platform.dylib            0x0000000185d73b50 _sigtramp + 52
2018-03-14 17:14:35.892 AELPMP[677:249758] critical:    3   libxamarin-debug.dylib              0x0000000101519f94 xamarin_get_block_wrapper_creator + 52
2018-03-14 17:14:35.892 AELPMP[677:249758] critical:    4   libxamarin-debug.dylib              0x000000010151dbd8 _ZL32get_method_block_wrapper_creatorP11_MonoMethodiPj + 260
2018-03-14 17:14:35.892 AELPMP[677:249758] critical:    5   libxamarin-debug.dylib              0x000000010151da04 xamarin_get_delegate_for_block_parameter + 64
2018-03-14 17:14:35.893 AELPMP[677:249758] critical:    6   AELPMP                              0x0000000100ba55f0 _ZL30native_to_managed_trampoline_8P11objc_objectP13objc_selectorPP11_MonoMethodP25MCNearbyServiceAdvertiserP8MCPeerIDP6NSDataS0_j + 848
2018-03-14 17:14:35.893 AELPMP[677:249758] critical:    7   AELPMP                              0x0000000100ba5294 -[AELPMP_MyNearbyAdvertiserDelegate advertiser:didReceiveInvitationFromPeer:withContext:invitationHandler:] + 80
2018-03-14 17:14:35.893 AELPMP[677:249758] critical:    8   MultipeerConnectivity               0x00000001a2080934 <redacted> + 180
2018-03-14 17:14:35.893 AELPMP[677:249758] critical:    9   libdispatch.dylib                   0x0000000185acea54 <redacted> + 24
2018-03-14 17:14:35.893 AELPMP[677:249758] critical:    10  libdispatch.dylib                   0x0000000185acea14 <redacted> + 16
2018-03-14 17:14:35.894 AELPMP[677:249758] critical:    11  libdispatch.dylib                   0x0000000185adb698 <redacted> + 1016
2018-03-14 17:14:35.894 AELPMP[677:249758] critical:    12  CoreFoundation                      0x00000001860f7344 <redacted> + 12
2018-03-14 17:14:35.894 AELPMP[677:249758] critical:    13  CoreFoundation                      0x00000001860f4f20 <redacted> + 2012
2018-03-14 17:14:35.894 AELPMP[677:249758] critical:    14  CoreFoundation                      0x0000000186014c58 CFRunLoopRunSpecific + 436
2018-03-14 17:14:35.895 AELPMP[677:249758] critical:    15  GraphicsServices                    0x0000000187ec0f84 GSEventRunModal + 100
2018-03-14 17:14:35.895 AELPMP[677:249758] critical:    16  UIKit                               0x000000018f76d5c4 UIApplicationMain + 236
2018-03-14 17:14:35.895 AELPMP[677:249758] critical:    17  libXamarin.iOS.dll.dylib            0x000000010112fce0 wrapper_managed_to_native_UIKit_UIApplication_UIApplicationMain_int_string___intptr_intptr + 368
2018-03-14 17:14:35.895 AELPMP[677:249758] critical:    18  libXamarin.iOS.dll.dylib            0x000000010111a1bc UIKit_UIApplication_Main_string___intptr_intptr + 44
2018-03-14 17:14:35.896 AELPMP[677:249758] critical:    19  libXamarin.iOS.dll.dylib            0x000000010111a17c UIKit_UIApplication_Main_string___string_string + 172
2018-03-14 17:14:35.896 AELPMP[677:249758] critical:    20  libAELPMP.exe.dylib                 0x0000000100bcbf80 AELPMP_Application_Main_string__ + 128
2018-03-14 17:14:35.896 AELPMP[677:249758] critical:    21  libmscorlib.dll.dylib               0x0000000100dcb8e8 wrapper_runtime_invoke_object_runtime_invoke_dynamic_intptr_intptr_intptr_intptr + 248
2018-03-14 17:14:35.896 AELPMP[677:249758] critical:    22  libmonosgen-2.0.dylib               0x00000001012104e0 mono_jit_runtime_invoke + 968
2018-03-14 17:14:35.897 AELPMP[677:249758] critical:    23  libmonosgen-2.0.dylib               0x0000000101290620 do_runtime_invoke + 112
2018-03-14 17:14:35.897 AELPMP[677:249758] critical:    24  libmonosgen-2.0.dylib               0x00000001012939b0 do_exec_main_checked + 144
2018-03-14 17:14:35.897 AELPMP[677:249758] critical:    25  libmonosgen-2.0.dylib               0x00000001011f2274 mono_jit_exec + 268
2018-03-14 17:14:35.897 AELPMP[677:249758] critical:    26  libxamarin-debug.dylib              0x000000010152ccd0 xamarin_main + 2220
2018-03-14 17:14:35.897 AELPMP[677:249758] critical:    27  AELPMP                              0x0000000100ba9958 main + 96
2018-03-14 17:14:35.898 AELPMP[677:249758] critical:    28  libdyld.dylib                       0x0000000185b3456c <redacted> + 4
2018-03-14 17:14:35.898 AELPMP[677:249758] 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.
=================================================================

XCode 输出这是我通过 Xcode 连接并查看设备日志时的输出

Incident Identifier: 791E1B33-A22E-4684-8ADF-0E4F601E01FC
CrashReporter Key:   8168b2a05f10e5f21da37250e7a61b844de00385
Hardware Model:      iPhone9,1
Process:             AELPMP [263]
Path:                /private/var/containers/Bundle/Application/99083856-91ED-46FF-A844-2E30F49014FF/AELPMP.app/AELPMP
Identifier:          net.agent7.AELP-MP
Version:             1.0 (1.0)
Code Type:           ARM-64 (Native)
Role:                Foreground
Parent Process:      launchd [1]
Coalition:           net.agent7.AELP-MP [413]


Date/Time:           2018-03-13 20:17:17.5692 -0400
Launch Time:         2018-03-13 20:17:17.4649 -0400
OS Version:          iPhone OS 11.2.6 (15D100)
Baseband Version:    3.42.00
Report Version:      104

Exception Type:  EXC_CRASH (SIGABRT)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Exception Note:  EXC_CORPSE_NOTIFY
Termination Description: DYLD, Library not loaded: @rpath/libmonosgen-2.0.dylib | Referenced from: /var/containers/Bundle/Application/99083856-91ED-46FF-A844-2E30F49014FF/AELPMP.app/AELPMP | Reason: no suitable image found.  Did find: | /private/var/containers/Bundle/Application/99083856-91ED-46FF-A844-2E30F49014FF/AELPMP.app/libmonosgen-2.0.dylib: required code signature missing for '/private/var/containers/Bundle/Application/99083856-91ED-46FF-A844-2E30F49014FF/AELPMP.app/libmonosgen-2.0.dylib' | 
Triggered by Thread:  0

Filtered syslog:
None found

Thread 0 Crashed:
0   dyld                            0x000000010066ef48 __abort_with_payload + 8
1   dyld                            0x000000010066e71c abort_with_payload_wrapper_internal + 100
2   dyld                            0x000000010066e748 fcntl + 0
3   dyld                            0x0000000100644498 dyld::fastBindLazySymbol+ 17560 (ImageLoader**, unsigned long) + 0
4   dyld                            0x0000000100647714 dyld::_main+ 30484 (macho_header const*, unsigned long, int, char const**, char const**, char const**, unsigned long*) + 7376
5   dyld                            0x000000010064121c _dyld_start + 68

Thread 0 crashed with ARM Thread State (64-bit):
    x0: 0x0000000000000006   x1: 0x0000000000000005   x2: 0x000000016f92e4b0   x3: 0x000000000000008b
    x4: 0x000000016f92e0b0   x5: 0x0000000000000000   x6: 0x0000000000000000   x7: 0x00000000000002e0
    x8: 0x0000000000000020   x9: 0x0000000000000009  x10: 0x67736f6e6f6d6269  x11: 0x642e302e322d6e65
   x12: 0x2f7070612e504d50  x13: 0x736f6e6f6d62696c  x14: 0x2e302e322d6e6567  x15: 0x000a2762696c7964
   x16: 0x0000000000000209  x17: 0x000000008000001f  x18: 0xfffffff00f0dd260  x19: 0x0000000000000000
   x20: 0x000000016f92e0b0  x21: 0x000000000000008b  x22: 0x000000016f92e4b0  x23: 0x0000000000000005
   x24: 0x0000000000000006  x25: 0x00000001004d0000  x26: 0x0000000100682000  x27: 0x0000000100681f88
   x28: 0x000000016f92fab0   fp: 0x000000016f92e080   lr: 0x000000010066e71c
    sp: 0x000000016f92e040   pc: 0x000000010066ef48 cpsr: 0x00000000

Binary Images:
0x1004d0000 - 0x1004dffff AELPMP arm64  <cf358776c3b038b6b2ba40f0fce56323> /var/containers/Bundle/Application/99083856-91ED-46FF-A844-2E30F49014FF/AELPMP.app/AELPMP
0x100500000 - 0x10050ffff libAELPMP.exe.dylib arm64  <125e771584d2332084c3901961cd3b59> /var/containers/Bundle/Application/99083856-91ED-46FF-A844-2E30F49014FF/AELPMP.app/libAELPMP.exe.dylib
0x100524000 - 0x10052bfff libSystem.dll.dylib arm64  <e2f273739ebe391f961f97cb8573fdde> /var/containers/Bundle/Application/99083856-91ED-46FF-A844-2E30F49014FF/AELPMP.app/libSystem.dll.dylib
0x100640000 - 0x10067ffff dyld arm64  <477a8a1f098b3a80860d656a3f4918ea> /usr/lib/dyld
0x1006dc000 - 0x100857fff libmscorlib.dll.dylib arm64  <141d1723f765324bb687d89b93133a2b> /var/containers/Bundle/Application/99083856-91ED-46FF-A844-2E30F49014FF/AELPMP.app/libmscorlib.dll.dylib
0x100b38000 - 0x100b9bfff libXamarin.iOS.dll.dylib arm64  <c208d3645de53ba59a7ff7179ff584bb> /var/containers/Bundle/Application/99083856-91ED-46FF-A844-2E30F49014FF/AELPMP.app/libXamarin.iOS.dll.dylib

EOF

Answer 1

在类似情况下，我发现在再次构建之前删除输出文件夹并清理可以解决此问题。

右键单击解决方案并选择“删除输出文件夹”