当我进入主屏幕时，应用程序使用Facebook登录SDK崩溃 [英] App crashes using Facebook Login SDK when I go to the home screen
问题描述
我最初下载了FBSDK的4.10版，并将它们放在我的应用程序中，方法是将它们放在frameworks文件夹中。意识到这些不会随着时间的推移而更新，我完全删除它们并尝试将它们作为pod添加到我的项目中。 pod已成功安装，我已在我的桥接头文件中正确导入它们，并且没有其他问题。 pods更新安装版本4.11，这让我有些头痛。
I originally downloaded the FBSDK's version 4.10 and integrated them into my application by placing them in the frameworks folder. Realizing that these would not get updated over time, I removed them completely and tried to add them as pods to my project. The pods installed successfully, I have imported them correctly in my bridging header file, and there were no other issues. The pods update installed version 4.11 which has caused me some headache.
我正在使用FBSDKLoginKit将用户登录到他们的帐户并从中检索信息。我能够收到一个包含用户信息的字典就好了。然后我将此信息传递给带有segue的下一个ViewController。在此之后的任何时候，如果我按下iPhone或模拟器上的主页按钮，应用程序将崩溃。我得到的错误是
I am using the FBSDKLoginKit to log a user into their account and retrieve information from that. I am able to get back a dictionary with the users information just fine. I then pass this information to the next ViewController with a segue. At any point after this, if I press the home button on my iPhone or simulator, the app will crash. The error I get is
*** Terminating app due to uncaught exception 'NSInvalidArgumentException',
reason: '*** -[__NSPlaceholderDictionary initWithObjects:forKeys:count:]:
attempt to insert nil object from objects[3]'
如果我让用户通过facebook登录，转到新视图控制器，展开到上一个视图控制器，然后再次尝试登录，也会发生此异常。我曾尝试在第二个屏幕上检索相关信息后将用户注销，但错误仍然存在。
This exception also occurs if I let the user log in through facebook, segue to the new view controller, unwind to the previous view controller, and then attempt to log in again. I have attempted to log the user out once retrieving their pertinent information on the second screen, but the error still persists.
我看到一个类似的问题询问解决方案 是FBSDKLoginKit将检索到的字典写入变量，如果它检索到的字典有nil值，则会抛出此错误。
I have seen a similar question asked where the "solution" was that the FBSDKLoginKit writes the retrieved dictionary to a variable and if the dictionary it has retrieved back has nil values, it throws this error.
在发生之前我能做些什么才能抓住这个？有没有人找到工作？
Is there anything I can do to catch this before it happens? Has anyone found a work around?
当我按下主页时，这是模拟器的输出：
Here is my output from the simulator when I press home:
*** First throw call stack:
(
0 CoreFoundation 0x0000000106f03d85 __exceptionPreprocess + 165
1 libobjc.A.dylib 0x000000010643edeb objc_exception_throw + 48
2 CoreFoundation 0x0000000106e0023e -[__NSPlaceholderDictionary initWithObjects:forKeys:count:] + 318
3 CoreFoundation 0x0000000106e125bb +[NSDictionary dictionaryWithObjects:forKeys:count:] + 59
4 APPNAME 0x0000000101607a1e -[FBSDKTimeSpentData instanceSuspend] + 622
5 APPNAME 0x000000010160766b +[FBSDKTimeSpentData suspend] + 59
6 APPNAME 0x00000001015b5986 -[FBSDKAppEvents applicationMovingFromActiveStateOrTerminating] + 262
7 CoreFoundation 0x0000000106ecdc8c __CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__ + 12
8 CoreFoundation 0x0000000106ecd9cb _CFXRegistrationPost + 427
9 CoreFoundation 0x0000000106ecd732 ___CFXNotificationPost_block_invoke + 50
10 CoreFoundation 0x0000000106f161e2 -[_CFXNotificationRegistrar find:object:observer:enumerator:] + 1986
11 CoreFoundation 0x0000000106dc5679 _CFXNotificationPost + 633
12 Foundation 0x000000010372ccd9 -[NSNotificationCenter postNotificationName:object:userInfo:] + 66
13 UIKit 0x0000000104a685ad -[UIApplication _deactivateForReason:notify:] + 629
14 UIKit 0x0000000104a6f1f1 __61-[UIApplication _sceneSettingsPreLifecycleEventDiffInspector]_block_invoke + 104
15 FrontBoardServices 0x0000000108f88d6c __52-[FBSSettingsDiffInspector inspectDiff:withContext:]_block_invoke27 + 213
16 Foundation 0x000000010377d5bb __NSIndexSetEnumerate + 1016
17 BaseBoard 0x000000010901ba8c -[BSSettingsDiff inspectChangesWithBlock:] + 116
18 FrontBoardServices 0x0000000108f83e4a -[FBSSettingsDiff inspectOtherChangesWithBlock:] + 92
19 FrontBoardServices 0x0000000108f88b2f -[FBSSettingsDiffInspector inspectDiff:withContext:] + 317
20 UIKit 0x0000000104a70880 __70-[UIApplication scene:didUpdateWithDiff:transitionContext:completion:]_block_invoke + 127
21 UIKit 0x0000000104a7052d -[UIApplication scene:didUpdateWithDiff:transitionContext:completion:] + 843
22 FrontBoardServices 0x0000000108f978c8 __FBSSERIALQUEUE_IS_CALLING_OUT_TO_A_BLOCK__ + 24
23 FrontBoardServices 0x0000000108f97741 -[FBSSerialQueue _performNext] + 178
24 FrontBoardServices 0x0000000108f97aca -[FBSSerialQueue _performNextFromRunLoopSource] + 45
25 CoreFoundation 0x0000000106e29301 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
26 CoreFoundation 0x0000000106e1f22c __CFRunLoopDoSources0 + 556
27 CoreFoundation 0x0000000106e1e6e3 __CFRunLoopRun + 867
28 CoreFoundation 0x0000000106e1e0f8 CFRunLoopRunSpecific + 488
29 GraphicsServices 0x0000000108ae7ad2 GSEventRunModal + 161
30 UIKit 0x0000000104a72f09 UIApplicationMain + 171
31 APPNAME 0x00000001013a26d2 main + 114
32 libdyld.dylib 0x0000000107b0d92d start + 1
33 ??? 0x0000000000000001 0x0 + 1
）
libc ++ abi.dylib：以未捕获的异常终止类型NSException
) libc++abi.dylib: terminating with uncaught exception of type NSException
逐步运行我的代码我发现在方法期间发生错误：
Running my code step by step I find that the error occurs during the method:
fbLoginManager.logInWithReadPermissions(permissionsNeeded, fromViewController: self) { (result, error) -> Void in
//crashes before it enters this block
//my code here
}
在我甚至可以检查错误值之前它崩溃了。我将尝试通过步入fbsdk方法检查值并更新
It crashes before I can even check the error value. I will attempt to check the values by stepping into the fbsdk methods and update
第二次在此屏幕上按OK时，它会崩溃。我该怎么调试呢？这个动作不在我的应用程序中，它在浏览器中，所以我不知道从哪里开始..
As soon as I press OK on this screen for the second time it crashes. How can I debug this? The action isn't in my app, its in the browser so I'm not sure where to go from here..
推荐答案
我最近遇到过这个问题，我通过在 Appdelegate.m 中添加这段代码解决了这个问题。
I have came across this issues recently, and i solved it by adding this piece of code in Appdelegate.m.
- (void)applicationDidBecomeActive:(UIApplication *)application {
[FBSDKAppEvents activateApp];
}
对于Swift 3版本：
For Swift 3 version:
func applicationDidBecomeActive(_ application: UIApplication) {
FBSDKAppEvents.activateApp()
}
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