Application crash when i run it in a real device iOS

Question

I am developing an application when using networking with Alamofire on Xcode 8.3 and when i used Alamofire code in the simulator it's working but when i tried my code in a real device iPhone 7 which has 10.2 iOS Version the application stop and getting

fatal error: unexpectedly found nil while unwrapping an Optional value

and this break point exception

libswiftCore.dylib`function signature specialization <preserving fragile attribute, Arg[2] = Dead, Arg[3] = Dead> of Swift._fatalErrorMessage (Swift.StaticString, Swift.StaticString, file : Swift.StaticString, line : Swift.UInt, flags : Swift.UInt32) -> Swift.Never:
    0x101b003d0 <+0>:   stp    x26, x25, [sp, #-0x50]!
    0x101b003d4 <+4>:   stp    x24, x23, [sp, #0x10]
    0x101b003d8 <+8>:   stp    x22, x21, [sp, #0x20]
    0x101b003dc <+12>:  stp    x20, x19, [sp, #0x30]
    0x101b003e0 <+16>:  stp    x29, x30, [sp, #0x40]
    0x101b003e4 <+20>:  add    x29, sp, #0x40            ; =0x40 
    0x101b003e8 <+24>:  mov    x19, x6
    0x101b003ec <+28>:  mov    x20, x5
    0x101b003f0 <+32>:  mov    x21, x4
    0x101b003f4 <+36>:  mov    x22, x3
    0x101b003f8 <+40>:  mov    x23, x2
    0x101b003fc <+44>:  mov    x24, x1
    0x101b00400 <+48>:  mov    x25, x0
    0x101b00404 <+52>:  adr    x8, #0xf11fc              ; protocol descriptor for Swift._DefaultCustomPlaygroundQuickLookable + 136
    0x101b00408 <+56>:  nop    
    0x101b0040c <+60>:  add    x0, x8, #0x10             ; =0x10 
    0x101b00410 <+64>:  mov    w1, #0x28
    0x101b00414 <+68>:  orr    w2, wzr, #0x7
    0x101b00418 <+72>:  bl     0x101b00750               ; swift_rt_swift_allocObject
    0x101b0041c <+76>:  mov    x8, x0
    0x101b00420 <+80>:  stp    x22, x21, [x8, #0x10]
    0x101b00424 <+84>:  strb   w20, [x8, #0x20]
    0x101b00428 <+88>:  str    w19, [x8, #0x24]
    0x101b0042c <+92>:  adr    x3, #0x40440              ; partial apply forwarder for Swift.(_fatalErrorMessage (Swift.StaticString, Swift.StaticString, file : Swift.StaticString, line : Swift.UInt, flags : Swift.UInt32) -> Swift.Never).(closure #2)
    0x101b00430 <+96>:  nop    
    0x101b00434 <+100>: mov    x0, x25
    0x101b00438 <+104>: mov    x1, x24
    0x101b0043c <+108>: mov    x2, x23
    0x101b00440 <+112>: mov    x4, x8
    0x101b00444 <+116>: bl     0x1019e14dc               ; function signature specialization <preserving fragile attribute, Arg[1] = [Closure Propagated : reabstraction thunk helper from @callee_owned (@unowned Swift.UnsafeBufferPointer<Swift.UInt8>) -> () to @callee_owned (@unowned Swift.UnsafeBufferPointer<Swift.UInt8>) -> (@out ()), Argument Types : [@callee_owned (@unowned Swift.UnsafeBufferPointer<Swift.UInt8>) -> ()]> of generic specialization <preserving fragile attribute, ()> of Swift.StaticString.withUTF8Buffer <A> ((Swift.UnsafeBufferPointer<Swift.UInt8>) -> A) -> A
->  0x101b00448 <+120>: brk    #0x1

and this is my code which i run

Alamofire.request(APIKeys().login, method: .post, parameters: ["email" : email , "password"  : password ], encoding: JSONEncoding.default , headers: APIKeys().headers).responseJSON(completionHandler: {( response  ) in
            if response.result.value != nil {
                print(response)
             let json = JSON(response.result.value ?? "")
            if json["status"].intValue  == 200
            {
                UserDefaults().set(json["email"].stringValue, forKey: "email")
                UserDefaults().set(json["id"].intValue, forKey: "userID")


            }


            }


        } )

I would guess one of our IBOutlets isn't connected. Check them all. — Martin Muldoon, May 13 '17 at 13:24
Are you sure that this peace of code is creating a problem .. I don't think so, You are actually wrapping some optional value which contains nil .. — Hobbit, May 13 '17 at 13:38
Did you nuke caches and clean derived data? I noticed `Swift._DefaultCustomPlaygroundQuickLookable` in there. — Adrian, May 13 '17 at 13:49
Set an exception breakpoint and determine the line causing the exception or if you have already done this, look back through the stack trace to find the code where the exception was thrown. — Paulw11, May 13 '17 at 13:59
Check Your device version and simulator version that you run. — ashwini, May 13 '17 at 14:10
Possible duplicate of [What does "fatal error: unexpectedly found nil while unwrapping an Optional value" mean?](http://stackoverflow.com/questions/32170456/what-does-fatal-error-unexpectedly-found-nil-while-unwrapping-an-optional-valu) — Scott Thompson, May 13 '17 at 15:41

score 1 · Accepted Answer · answered May 20 '17 at 14:04

1

Just Cleaned the cache and reinstalled the app and it's working well at the device

answered May 20 '17 at 14:04

Muhammed

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Application crash when i run it in a real device iOS

1 Answers1