我在评论下方提到的行中遇到 SIGABRT ABORT 崩溃(let data = fbResult.objectForKey("data") as!NSMutableArray)。我只是想通过 Facebook 保存用户的分数。请注意，我无法重现此问题，而且这种情况只发生在极少数设备上。我刚刚通过崩溃报告发现了这个问题。
var fbScore = 0
func getFBScore(){
if(FBSDKAccessToken.currentAccessToken() != nil){
var request = FBSDKGraphRequest(graphPath: "me/scores?fields=score", parameters: nil)
request.startWithCompletionHandler({(connection, result, error) -> Void in
if(error != nil){
println("facebook score reading failed with error \(error)")
} else {
println("facebook score reading result \(result)")
let fbResult = result as! NSDictionary
//crash on below line
let data = fbResult.objectForKey("data") as! NSMutableArray
if(data.count == 0){
self.postFBScore(0)
} else {
if let mScore = data[0].objectForKey("score") as? Int{
self.fbScore = mScore
println("facebook score is \(self.fbScore)")
} else{
self.postFBScore(0)
}
}
}
})
}
}
这是我得到的崩溃报告。
Thread : Crashed: com.apple.main-thread
0 libsystem_kernel.dylib 0x00000001954db270 __pthread_kill + 8
1 libsystem_pthread.dylib 0x0000000195579160 pthread_kill + 112
2 libsystem_c.dylib 0x0000000195452aa0 abort + 112
3 libswiftCore.dylib 0x0000000100a6dd80 swift::fatalError(char const*, ...) + 182
4 libswiftCore.dylib 0x0000000100a4aefc swift::swift_dynamicCastFailure(void const*, char const*, void const*, char const*, char const*) + 70
5 libswiftCore.dylib 0x0000000100a4af80 swift::swift_dynamicCastFailure(swift::Metadata const*, swift::Metadata const*, char const*) + 130
6 libswiftCore.dylib 0x0000000100a6f6dc swift_dynamicCastObjCClassUnconditional + 72
7 MY_APP 0x00000001000e5c70 MY_APP.GameScene.(getFBScore (MY_APP.GameScene) -> () -> ()).(closure #1) (GameScene.swift:1600)
8 MY_APP 0x00000001003d6ea4 -[FBSDKGraphRequestMetadata invokeCompletionHandlerForConnection:withResults:error:] (FBSDKGraphRequestMetadata.m:48)
9 MY_APP 0x00000001003ddef0 __82-[FBSDKGraphRequestConnection processResultBody:error:metadata:canNotifyDelegate:]_block_invoke394 (FBSDKGraphRequestConnection.m:719)
10 MY_APP 0x00000001003ddca0 -[FBSDKGraphRequestConnection processResultBody:error:metadata:canNotifyDelegate:] (FBSDKGraphRequestConnection.m:768)
11 MY_APP 0x00000001003dd768 __64-[FBSDKGraphRequestConnection completeWithResults:networkError:]_block_invoke (FBSDKGraphRequestConnection.m:697)
12 CoreFoundation 0x00000001832b0d48 __53-[__NSArrayM enumerateObjectsWithOptions:usingBlock:]_block_invoke + 132
13 CoreFoundation 0x00000001832b0c2c -[__NSArrayM enumerateObjectsWithOptions:usingBlock:] + 312
14 MY_APP 0x00000001003dd500 -[FBSDKGraphRequestConnection completeWithResults:networkError:] (FBSDKGraphRequestConnection.m:679)
15 MY_APP 0x00000001003dc950 -[FBSDKGraphRequestConnection completeFBSDKURLConnectionWithResponse:data:networkError:] (FBSDKGraphRequestConnection.m:544)
16 MY_APP 0x00000001003da910 __36-[FBSDKGraphRequestConnection start]_block_invoke_2 (FBSDKGraphRequestConnection.m:188)
17 MY_APP 0x00000001003d76ec -[FBSDKURLConnection invokeHandler:error:response:responseData:] (FBSDKURLConnection.m:104)
18 MY_APP 0x00000001003d7644 -[FBSDKURLConnection logAndInvokeHandler:response:responseData:] (FBSDKURLConnection.m:96)
19 MY_APP 0x00000001003d7a28 -[FBSDKURLConnection connectionDidFinishLoading:] (FBSDKURLConnection.m:143)
20 CFNetwork 0x0000000182e391e8 __65-[NSURLConnectionInternal _withConnectionAndDelegate:onlyActive:]_block_invoke + 80
21 CFNetwork 0x0000000182e39178 -[NSURLConnectionInternal _withConnectionAndDelegate:onlyActive:] + 208
22 CFNetwork 0x0000000182e392f4 -[NSURLConnectionInternal _withActiveConnectionAndDelegate:] + 60
23 CFNetwork 0x0000000182d0bdfc ___ZN27URLConnectionClient_Classic26_delegate_didFinishLoadingEU13block_pointerFvvE_block_invoke + 104
24 CFNetwork 0x0000000182dd6120 ___ZN27URLConnectionClient_Classic18_withDelegateAsyncEPKcU13block_pointerFvP16_CFURLConnectionPK33CFURLConnectionClientCurrent_VMaxE_block_invoke_2 + 104
25 CFNetwork 0x0000000182cf7efc RunloopBlockContext::_invoke_block(void const*, void*) + 76
26 CoreFoundation 0x000000018329c97c CFArrayApplyFunction + 68
27 CFNetwork 0x0000000182cf7da8 RunloopBlockContext::perform() + 136
28 CFNetwork 0x0000000182cf7c5c MultiplexerSource::perform() + 312
29 CFNetwork 0x0000000182cf7a88 MultiplexerSource::_perform(void*) + 68
30 CoreFoundation 0x0000000183373f8c __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 24
31 CoreFoundation 0x0000000183373230 __CFRunLoopDoSources0 + 264
32 CoreFoundation 0x00000001833712e0 __CFRunLoopRun + 712
33 CoreFoundation 0x000000018329cf74 CFRunLoopRunSpecific + 396
34 GraphicsServices 0x000000018cba76fc GSEventRunModal + 168
35 UIKit 0x0000000187e9ed94 UIApplicationMain + 1488
36 MY_APP 0x00000001000f6c58 main (AppDelegate.swift:16)
37 libdyld.dylib 0x00000001953c2a08 start + 4
当我尝试在我的控制台上打印 fbResult 时，这就是我得到的结果。
{ data = ( { score = 41; user = { id = 10206371034343540; name = "Rohit Goyal"; }; } ); }
最佳答案
由于这一行有异常:
let data = fbResult.objectForKey("data") as! NSMutableArray
鉴于 Swift 是一种强静态类型语言，唯一可能的错误原因是使用 ! 运算符将对象转换为类型 NSMutableArray。因此，如果您知道绑定(bind)到键 data 的值是一个数组，您应该尝试将它转换为一个非可变数组:
let data = fbResult.objectForKey("data") as! NSArray
关于ios - iOS swift 上的 SIGABRT ABORT 崩溃，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/32270435/