Using Chat Application XMPPFramework Iam getting This Error - ios

Question

Using Chat Application with XMPPFramework Iam getting This Error
Message SendButton Action as given below, plz help me if any one have idea then tell me plz..............
- (IBAction)sendAction:(id)sender
{
if([_chatTextField.text length] > 0)
{
NSString* po = getUser.ofUser;
bubbleTable.typingBubble = NSBubbleTypingTypeNobody;
NSBubbleData *messageBubble = [NSBubbleData dataWithText:_chatTextField.text date:[NSDate dateWithTimeIntervalSinceNow:0] type:BubbleTypeMine];
[bubbleData addObject:messageBubble];
[bubbleTable reloadData];
[bubbleTable scrollBubbleViewToBottomAnimated:YES];
[[QuoteMessageController SharedInstance] SendChatMessageTo:getUser.account withContent:_chatTextField.text toUserId:[NSString stringWithFormat:#"%ld", (long)getUser.Id] andOFId:po andVerifyKey:chatMessageKey];
}
Getting error in output as given bellow>>>>>>
*** First throw call stack:
(
0 CoreFoundation 0x000000010e18ff35 __exceptionPreprocess + 165
1 libobjc.A.dylib 0x000000010da7bbb7 objc_exception_throw + 45
2 CoreFoundation 0x000000010e18fe6d +[NSException raise:format:] + 205
3 Foundation 0x000000010ba211f8 -[NSString stringByAppendingString:] + 96
4 SourceSage 0x000000010ae0c939 +[SSWriteReadInDb writeQuotesTable:UserImageUrl:UserId:OfUser:] + 409
5 SourceSage 0x000000010adb8d56 -[QuoteMessageController SendChatMessageTo:withContent:toUserId:andOFId:andVerifyKey:] + 2454
6 SourceSage 0x000000010ad6ac30 -[SSChatViewController sendAction:] + 752
7 UIKit 0x000000010beb48be -[UIApplication sendAction:to:from:forEvent:] + 75
8 UIKit 0x000000010bfbb410 -[UIControl _sendActionsForEvents:withEvent:] + 467
9 UIKit 0x000000010bfba7df -[UIControl touchesEnded:withEvent:] + 522
10 UIKit 0x000000010befa308 -[UIWindow _sendTouchesForEvent:] + 735
11 UIKit 0x000000010befac33 -[UIWindow sendEvent:] + 683
12 UIKit 0x000000010bec79b1 -[UIApplication sendEvent:] + 246
13 UIKit 0x000000010bed4a7d _UIApplicationHandleEventFromQueueEvent + 17370
14 UIKit 0x000000010beb0103 _UIApplicationHandleEventQueue + 1961
15 CoreFoundation 0x000000010e0c5551 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
16 CoreFoundation 0x000000010e0bb41d __CFRunLoopDoSources0 + 269
17 CoreFoundation 0x000000010e0baa54 __CFRunLoopRun + 868
18 CoreFoundation 0x000000010e0ba486 CFRunLoopRunSpecific + 470
19 GraphicsServices 0x000000010fe7c9f0 GSEventRunModal + 161
20 UIKit 0x000000010beb3420 UIApplicationMain + 1282
21 SourceSage 0x000000010ae02893 main + 115
22 libdyld.dylib 0x000000010ee2e145 start + 1
23 ??? 0x0000000000000001 0x0 + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
(lldb)

Answer 1

After looking at this part of your stack trace:
2 CoreFoundation 0x000000010e18fe6d +[NSException raise:format:] + 205
3 Foundation 0x000000010ba211f8 -[NSString stringByAppendingString:] + 96
4 SourceSage 0x000000010ae0c939 +[SSWriteReadInDb writeQuotesTable:UserImageUrl:UserId:OfUser:] + 409
5 SourceSage 0x000000010adb8d56 -[QuoteMessageController SendChatMessageTo:withContent:toUserId:andOFId:andVerifyKey:] + 2454
6 SourceSage 0x000000010ad6ac30 -[SSChatViewController sendAction:] + 752
You'll see the exception is raised after a string is appended to a string. That is usually caused from appending nil to the string. By guess is that one of your NSString arguments that you're sending to the method below is nil.
[[QuoteMessageController SharedInstance] SendChatMessageTo:getUser.account
withContent:_chatTextField.text
toUserId:[NSString stringWithFormat:#"%ld", (long)getUser.Id]
andOFId:po
andVerifyKey:chatMessageKey];
To find out if this is in fact the case, either set a breakpoint here and check all the values, or add in the following before you call this method:
NSLog(#"%#", getUser.account);
NSLog(#"%#", _chatTextField.text);
NSLog(#"%#", po);
NSLog(#"%#", [NSString stringWithFormat:#"%ld", (long)getUser.Id]);
NSLog(#"%#", chatMessageKey);
I don't know what your parameters actually are, so remove the NSLogs for the variables that are not NSString. If one of these logs come back as nil or null (I forget what the console will output), then you found your issue. If it's an argument that you don't necessarily need, you should pass an empty NSString instead. I usually do this with a ternary. So assuming the culprit is _chatTextField.text, I would pass that argument as:
[[QuoteMessageController SharedInstance] SendChatMessageTo:getUser.account
withContent:_chatTextField.text ?: #""
toUserId:[NSString stringWithFormat:#"%ld", (long)getUser.Id]
andOFId:po
andVerifyKey:chatMessageKey];
Doing this basically says, if _chatTextField.text is true (which it will equate to if it is not nill), use that value, otherwise use #""
EDIT:
- (IBAction)sendAction:(id)sender
{
if([_chatTextField.text length] > 0)
{
NSString* po = getUser.ofUser ?: #"";
NSString *acct = getUser.account ?: #"";
bubbleTable.typingBubble = NSBubbleTypingTypeNobody;
NSBubbleData *messageBubble = [NSBubbleData dataWithText:_chatTextField.text date:[NSDate dateWithTimeIntervalSinceNow:0] type:BubbleTypeMine];
[bubbleData addObject:messageBubble];
[bubbleTable reloadData];
[bubbleTable scrollBubbleViewToBottomAnimated:YES];
[[QuoteMessageController SharedInstance] SendChatMessageTo:acct withContent:_chatTextField.text toUserId:[NSString stringWithFormat:#"%ld", (long)getUser.Id] andOFId:po andVerifyKey:chatMessageKey];
}