mfpサーバーがダウンしているときにiOSアプリケーションがクラッシュする

Question

Swift 3とXcode 8で開発されたiOSアプリケーションは、MobileFirst Platform Foundation v8サーバー上のJavaアダプターに接続します。サーバーがダウンしているときにモバイルアプリがmfpサーバーに接続すると、エラーが発生します。ここで手順は次のとおりです。

MFPログインが

以下のアプリがクラッシュして失敗したモバイルアプリへ

1. 停止MFPサーバ
2. ログインはログトレースです：

   objc[63675]: Class PLBuildVersion is implemented in both /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator.sdk/System/Library/PrivateFrameworks/AssetsLibraryServices.framework/AssetsLibraryServices (0x110f65998) and /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator.sdk/System/Library/PrivateFrameworks/PhotoLibraryServices.framework/PhotoLibraryServices (0x110d8ad38). One of the two will be used. Which one is undefined. 
   2016-11-18 16:24:21.561 HealthKitConnector[63675:509167] -canOpenURL: failed for URL: "fbauth2:/" - error: "The operation couldn’t be completed. (OSStatus error -10814.)" 
   2016-11-18 16:24:21.565 HealthKitConnector[63675:509167] -canOpenURL: failed for URL: "fbauth2:/" - error: "The operation couldn’t be completed. (OSStatus error -10814.)" 
   2016-11-18 16:24:22.205403 HealthKitConnector[63675:509167] [MC] System group container for systemgroup.com.apple.configurationprofiles path is /Users/sudhargo/Library/Developer/CoreSimulator/Devices/EAD81986-2A0E-47B2-8C6E-CCD499B7C2AC/data/Containers/Shared/SystemGroup/systemgroup.com.apple.configurationprofiles 
   2016-11-18 16:24:22.205826 HealthKitConnector[63675:509167] [MC] Reading from private effective user settings. 
   2016-11-18 16:24:27.137331 HealthKitConnector[63675:509167] [App] if we're in the real pre-commit handler we can't actually add any new fences due to CA restriction 
   2016-11-18 16:24:33.846261 HealthKitConnector[63675:509167] [App] if we're in the real pre-commit handler we can't actually add any new fences due to CA restriction 
   User has successfully logged in. 
   TOKEN IS: Optional("EAAQMDtvBvmEBAGbeZAYCo8WdcqkbxM7y7mXQ81FvUDKcM81kZCIIKTOafsncm74Sr8xtxV9whsH98PpjHsvvDPWyFgeg1VdgLOXd3Ou4RLZCSRzO8P6ZC5HUyPZB1T9ZAO0CZCsRDH9ApeNMQpWoTvuPgZCHNVJs4tfGTCLlQSG5wkRgwxhD6EeaUbzTkcWdi5T516VH1ZBrXLRElIfO2Fpy93jikSYoH1MIZD") 
   2016-11-18 16:24:49.216 HealthKitConnector[63675:509167] Login failed Optional("Could not connect to the server.") 
   2016-11-18 16:24:49.229 HealthKitConnector[63675:509167] [FATAL] [WORKLIGHT] Uncaught Exception: *** -[NSDictionary initWithObjects:forKeys:]: count of objects (1) differs from count of keys (3) 
   2016-11-18 16:24:49.231 HealthKitConnector[63675:509167] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[NSDictionary initWithObjects:forKeys:]: count of objects (1) differs from count of keys (3)' 
   *** First throw call stack: 
   (
       0 CoreFoundation      0x000000010210d34b __exceptionPreprocess + 171 
       1 libobjc.A.dylib      0x0000000101b6e21e objc_exception_throw + 48 
       2 CoreFoundation      0x0000000102077c9b -[NSDictionary initWithObjects:forKeys:] + 811 
       3 CoreFoundation      0x00000001020b5644 +[NSDictionary dictionaryWithObjects:forKeys:] + 52 
       4 IBMMobileFirstPlatformFoundation 0x0000000100fa8d0d -[WLAuthorizationManager paramsForPreauthorizationRequestWithScope:WithCredentials:] + 429 
       5 IBMMobileFirstPlatformFoundation 0x0000000100fa8022 -[WLAuthorizationManager invokePreAuthorizationRequestWithScope:WithCredentials:completionHandler:] + 722 
       6 IBMMobileFirstPlatformFoundation 0x0000000100fa398e -[WLAuthorizationManager sendLoginRequest:credentials:] + 302 
       7 IBMMobileFirstPlatformFoundation 0x0000000100fa476d __70-[WLAuthorizationManager login:withCredentials:withCompletionHandler:]_block_invoke311 + 125 
       8 IBMMobileFirstPlatformFoundation 0x0000000100fa6e96 __81-[WLAuthorizationManager invokeInstanceRegistrationRequestWithCompletionHandler:]_block_invoke + 598 
       9 IBMMobileFirstPlatformFoundation 0x0000000100fa1962 -[WLAuthorizationRequestDelegate onFailureWithResponse:userInfo:] + 642 
       10 IBMMobileFirstPlatformFoundation 0x0000000100f93812 -[WLRequest requestFailed:error:] + 3506 
       11 IBMMobileFirstPlatformFoundation 0x0000000100f3813e -[WLAFHTTPSessionManagerWrapper requestFailed:responseObject:error:] + 2398 
       12 IBMMobileFirstPlatformFoundation 0x0000000100f36e67 __38-[WLAFHTTPSessionManagerWrapper start]_block_invoke + 295 
       13 IBMMobileFirstPlatformFoundation 0x0000000100f55cfb __74-[WLAFURLSessionManagerTaskDelegate URLSession:task:didCompleteWithError:]_block_invoke + 203 
       14 libdispatch.dylib     0x000000010472b980 _dispatch_call_block_and_release + 12 
       15 libdispatch.dylib     0x00000001047550cd _dispatch_client_callout + 8 
       16 libdispatch.dylib     0x0000000104735a1d _dispatch_main_queue_callback_4CF + 733 
       17 CoreFoundation      0x00000001020d14f9 __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 9 
       18 CoreFoundation      0x0000000102096f8d __CFRunLoopRun + 2205 
       19 CoreFoundation      0x0000000102096494 CFRunLoopRunSpecific + 420 
       20 GraphicsServices     0x000000010791fa6f GSEventRunModal + 161 
       21 UIKit        0x0000000102530964 UIApplicationMain + 159 
       22 HealthKitConnector     0x0000000100a03ebf main + 111 
       23 libdyld.dylib      0x00000001047a168d start + 1 
   ) 
   libc++abi.dylib: terminating with uncaught exception of type NSException 
   (lldb) 
   

Answer 1

この場合、エラーメッセージから仮定すると、jsonレスポンスはnilを返します。ここで辞書をチェックする必要があります。

if(responseDict){ 
    // put your code here 
}