а лучше файл креша вытяни
Fatal Exception: NSInvalidArgumentException
0 CoreFoundation 0x1a7beaa48 __exceptionPreprocess
1 libobjc.A.dylib 0x1a7911fa4 objc_exception_throw
2 CoreFoundation 0x1a7c40360 -[__NSCFString characterAtIndex:].cold.1
3 CoreFoundation 0x1a7c3f9f4 -[__NSArrayM insertObject:atIndex:].cold.2
4 CoreFoundation 0x1a7ac2120 -[__NSArrayM insertObject:atIndex:]
5 FBSDKCoreKit 0x10231bf18 (Missing)
6 FBSDKCoreKit 0x10231bb44 (Missing)
7 FBSDKCoreKit 0x10231b6a4 (Missing)
8 libdispatch.dylib 0x1a78b7184 _dispatch_client_callout
9 libdispatch.dylib 0x1a785e9a4 _dispatch_once_callout
10 FBSDKCoreKit 0x10231b66c (Missing)
11 FBSDKCoreKit 0x10231cc7c (Missing)
12 FBSDKCoreKit 0x102326e44 (Missing)
13 FBSDKCoreKit 0x102326870 (Missing)
14 FBSDKCoreKit 0x102332644 (Missing)
15 FBSDKCoreKit 0x1023277e4 (Missing)
16 FBSDKCoreKit 0x102327654 (Missing)
17 FBSDKCoreKit 0x10232702c (Missing)
18 FBSDKCoreKit 0x1023303f0 (Missing)
19 FBSDKCoreKit 0x10232dcd0 (Missing)
20 FBSDKCoreKit 0x10232dbc4 (Missing)
21 FBSDKCoreKit 0x10232d7d4 (Missing)
22 CoreFoundation 0x1a7bbd95c NSARRAY_IS_CALLING_OUT_TO_A_BLOCK
23 CoreFoundation 0x1a7ac0ed0 -[__NSArrayM enumerateObjectsWithOptions:usingBlock:]
24 FBSDKCoreKit 0x10232d598 (Missing)
25 FBSDKCoreKit 0x10232ca4c (Missing)
26 FBSDKCoreKit 0x10232abac (Missing)
27 libdispatch.dylib 0x1a78b6610 _dispatch_call_block_and_release
28 libdispatch.dylib 0x1a78b7184 _dispatch_client_callout
29 libdispatch.dylib 0x1a7869190 _dispatch_main_queue_callback_4CF$VARIANT$mp
30 CoreFoundation 0x1a7b685e4 CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE
31 CoreFoundation 0x1a7b635d8 __CFRunLoopRun
32 CoreFoundation 0x1a7b62adc CFRunLoopRunSpecific
33 GraphicsServices 0x1b1b03328 GSEventRunModal
34 UIKitCore 0x1abc7063c UIApplicationMain
35 True 0x100685af4 main + 15 (main.m:15)
36 libdyld.dylib 0x1a79ec360 start