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POiPhone app crash with [NSObject(NSObject) doesNotRecognizeSelector:]
 

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  1. POiPhone app crash with [NSObject(NSObject) doesNotRecognizeSelector:]
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    <p>Here is the crash report not sure why. I use AFHTTPRequestOperation setCompletionBlockWithSuccess:failure: to make a call. in the completion block I get the results and pass it to a category class on my data model to insert into core data tables.</p> <p>below is the crash log..</p> <p>Last Exception Backtrace:</p> <pre><code>0 CoreFoundation 0x2fed7f4e __exceptionPreprocess + 126 1 libobjc.A.dylib 0x3a2b06aa objc_exception_throw + 34 2 CoreFoundation 0x2fedb8e2 -[NSObject(NSObject) doesNotRecognizeSelector:] + 198 3 CoreFoundation 0x2feda1ce ___forwarding___ + 702 4 CoreFoundation 0x2fe29594 __forwarding_prep_0___ + 20 5 &lt;myappname&gt; 0x000bbfe8 +[BTRooms(Data) createNewRoom:withNode:] (BTRooms+Data.m:32) 6 &lt;myappname&gt; 0x000b034e __28-[BTNet createRoom:friends:]_block_invoke (BTNet.m:551) 7 &lt;myappname&gt; 0x0008fd10 __64-[AFHTTPRequestOperation setCompletionBlockWithSuccess:failure:]_block_invoke139 (AFHTTPRequestOperation.m:279) 8 libdispatch.dylib 0x3a793d76 _dispatch_call_block_and_release + 6 9 libdispatch.dylib 0x3a793d62 _dispatch_client_callout + 18 10 libdispatch.dylib 0x3a79a7bc _dispatch_main_queue_callback_4CF$VARIANT$mp + 264 11 CoreFoundation 0x2fea281c __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 4 12 CoreFoundation 0x2fea10f0 __CFRunLoopRun + 1296 13 CoreFoundation 0x2fe0bce2 CFRunLoopRunSpecific + 518 14 CoreFoundation 0x2fe0bac6 CFRunLoopRunInMode + 102 15 GraphicsServices 0x34b2c27e GSEventRunModal + 134 16 UIKit 0x326ada3c UIApplicationMain + 1132 17 &lt;myappname&gt; 0x0005e280 main (main.m:16) 18 libdyld.dylib 0x3a7b8ab2 tlv_initializer + 2 </code></pre> <p>Crashed Thread</p> <pre><code>0 libsystem_kernel.dylib 0x3a86f1fc __pthread_kill + 8 1 libsystem_pthread.dylib 0x3a8d8a2e pthread_kill + 54 2 libsystem_c.dylib 0x3a81fff8 abort + 72 3 libc++abi.dylib 0x39b4ecd2 abort_message + 70 4 libc++abi.dylib 0x39b676e0 default_terminate_handler() + 248 5 libobjc.A.dylib 0x3a2b091e _objc_terminate() + 190 6 libc++abi.dylib 0x39b651c4 std::__terminate(void (*)()) + 76 7 libc++abi.dylib 0x39b64a18 __cxa_throw + 112 8 libobjc.A.dylib 0x3a2b077e objc_exception_throw + 246 9 CoreFoundation 0x2fedb8e2 -[NSObject(NSObject) doesNotRecognizeSelector:] + 198 10 CoreFoundation 0x2feda1ce ___forwarding___ + 702 11 CoreFoundation 0x2fe29594 __forwarding_prep_0___ + 20 12 &lt;myappname&gt; 0x000bbfea +[BTRooms(Data) createNewRoom:withNode:] (BTRooms+Data.m:32) 13 &lt;myappname&gt; 0x000b0350 __28-[BTNet createRoom:friends:]_block_invoke (BTNet.m:551) 14 &lt;myappname&gt; 0x0008fd12 __64-[AFHTTPRequestOperation setCompletionBlockWithSuccess:failure:]_block_invoke139 (AFHTTPRequestOperation.m:279) 15 libdispatch.dylib 0x3a793d78 _dispatch_call_block_and_release + 8 16 libdispatch.dylib 0x3a793d64 _dispatch_client_callout + 20 17 libdispatch.dylib 0x3a79a7bc _dispatch_main_queue_callback_4CF$VARIANT$mp + 264 18 CoreFoundation 0x2fea281c __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 4 19 CoreFoundation 0x2fea10f0 __CFRunLoopRun + 1296 20 CoreFoundation 0x2fe0bce2 CFRunLoopRunSpecific + 518 21 CoreFoundation 0x2fe0bac6 CFRunLoopRunInMode + 102 22 GraphicsServices 0x34b2c27e GSEventRunModal + 134 23 UIKit 0x326ada3c UIApplicationMain + 1132 24 &lt;myappname&gt; 0x0005e280 main (main.m:16) 25 libdyld.dylib 0x3a7b8ab4 start + 0 </code></pre> <p>Please give me some insights on the crash log. I have been on this for several hours now.</p> <p>Here is my code..</p> <pre><code>MyClient* client = [MyClient sharedClient]; [client setParameterEncoding:AFJSONParameterEncoding]; NSMutableURLRequest* request = [client requestWithMethod:@"POST" path:@"/JoinRoom" parameters:data]; AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc] initWithRequest:request]; [client registerHTTPOperationClass:[AFHTTPRequestOperation class]]; [operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) { // Print the response body in text //NSString* responseText = [[NSString alloc] initWithData:responseObject encoding:NSUTF8StringEncoding]; NSError* error3; NSDictionary* json = [NSJSONSerialization JSONObjectWithData:responseObject //1 options:0 error:&amp;error3]; NSString* status = [json objectForKey:@"status"]; if ([status isEqualToString:kBTOK]){ // OK NSDictionary* room = [json objectForKey:@"data"]; BTRooms* newRoom = [BTRooms createNewRoom:room withNode:@""]; } else{ // Do something else } } failure:^(AFHTTPRequestOperation *operation, NSError *error) { // Do something else }]; [[[MyClient sharedClient] operationQueue] addOperation:operation]; </code></pre> <p>And [BTRooms createNewRoom:room withNode:@""] looks like this.. </p> <pre><code>+ (BTRooms*) createNewRoom:(NSDictionary *)roomDic withNode: (NSString*) node{ NSString* roomId = [roomDic objectForKey:@"roomid"]; //more code here } </code></pre> <p>It doesn't crash when I connect and debug with xCode. It crashes randomly when the app is in the background for a while and I run it in the device. The one that made the remote call is one of my tabbar controller viewcontroller.</p> <p><strong>NEW UPDATE</strong>:</p> <p>Figured it out! Sorry for the misleading question. nothing to do with iOS. it was a bug from the server side (app engine issue). I will post that in a separate question.</p> <pre><code>[operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) { NSError* error3; NSDictionary* json = [NSJSONSerialization JSONObjectWithData:responseObject //1 options:0 error:&amp;error3]; NSString* status = [json objectForKey:@"status"]; if ([status isEqualToString:kBTOK]){ // OK NSDictionary* room = [json objectForKey:@"data"]; // room is null here!! } </code></pre>
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      1. POiPhone app crash with [NSObject(NSObject) doesNotRecognizeSelector:]
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    2. COCrash suggests the last line in your application is `+[BTRooms(Data) createNewRoom:withNode:]` in file `BTRooms+Data.m line no 32`. You should start looking from there. Post the relevant code.
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      1. POiPhone app crash with [NSObject(NSObject) doesNotRecognizeSelector:]
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