我写这段代码是因为我需要一个有两个按钮的应用程序，当我按下第一个按钮时，我想在我的FirebaseDB中编写video01，当我按下第二个按钮时，我想编写video02。
当我编译代码时，我没有看到这两个按钮，并且在我看来是错误的SIGABRT
这是我的代码：
import Firebase
import UIKit
class ViewController: UIViewController {
var refController: DatabaseReference!
@IBAction func btt_video1(_ sender: Any) {
refController.child("nowPlaying").setValue("video01")
}
@IBAction func btt_video2(_ sender: Any) {
refController.child("nowPlaying").setValue("video02")
}
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
//configuring firebase
FirebaseApp.configure()
refController = Database().reference().child("parametri");
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
这是我的错误：
2018-04-30 16:31:42.403230-0400 Remote Controller Client[26074:469999] 4.13.0 - [Firebase/Analytics][I-ACS023007] Firebase Analytics v.40200000 started
2018-04-30 16:31:42.407953-0400 Remote Controller Client[26074:469999] 4.13.0 - [Firebase/Analytics][I-ACS023008] To enable debug logging set the following application argument: -FIRAnalyticsDebugEnabled
2018-04-30 16:31:42.444269-0400 Remote Controller Client[26074:469864] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[__NSDictionaryM setObject:forKeyedSubscript:]: key cannot be nil'
*** First throw call stack:
(
0 CoreFoundation 0x000000010f2d01e6 __exceptionPreprocess + 294
1 libobjc.A.dylib 0x000000010e3d0031 objc_exception_throw + 48
2 CoreFoundation 0x000000010f3100bc _CFThrowFormattedException + 194
3 CoreFoundation 0x000000010f3746e2 -[__NSDictionaryM setObject:forKeyedSubscript:] + 1026
4 Remote Controller Client 0x000000010c857470 +[FRepoManager createRepo:config:database:] + 273
5 Remote Controller Client 0x000000010c83eb16 -[FIRDatabase ensureRepo] + 151
6 Remote Controller Client 0x000000010c83e20e -[FIRDatabase reference] + 31
7 Remote Controller Client 0x000000010c7b6da3 _T024Remote_Controller_Client04ViewB0C11viewDidLoadyyF + 131
8 Remote Controller Client 0x000000010c7b6f44 _T024Remote_Controller_Client04ViewB0C11viewDidLoadyyFTo + 36
9 UIKit 0x000000010f8f1191 -[UIViewController loadViewIfRequired] + 1215
10 UIKit 0x000000010f8f15d4 -[UIViewController view] + 27
11 UIKit 0x000000010f7bf183 -[UIWindow addRootViewControllerViewIfPossible] + 122
12 UIKit 0x000000010f7bf894 -[UIWindow _setHidden:forced:] + 294
13 UIKit 0x000000010f7d262c -[UIWindow makeKeyAndVisible] + 42
14 UIKit 0x000000010f74643a -[UIApplication _callInitializationDelegatesForMainScene:transitionContext:] + 4739
15 UIKit 0x000000010f74b62b -[UIApplication _runWithMainScene:transitionContext:completion:] + 1677
16 UIKit 0x000000010fb0de4a __111-[__UICanvasLifecycleMonitor_Compatability _scheduleFirstCommitForScene:transition:firstActivation:completion:]_block_invoke + 866
17 UIKit 0x000000010fee0909 +[_UICanvas _enqueuePostSettingUpdateTransactionBlock:] + 153
18 UIKit 0x000000010fb0da86 -[__UICanvasLifecycleMonitor_Compatability _scheduleFirstCommitForScene:transition:firstActivation:completion:] + 236
19 UIKit 0x000000010fb0e2a7 -[__UICanvasLifecycleMonitor_Compatability activateEventsOnly:withContext:completion:] + 675
20 UIKit 0x000000011047f4d4 __82-[_UIApplicationCanvas _transitionLifecycleStateWithTransitionContext:completion:]_block_invoke + 299
21 UIKit 0x000000011047f36e -[_UIApplicationCanvas _transitionLifecycleStateWithTransitionContext:completion:] + 433
22 UIKit 0x000000011016362d __125-[_UICanvasLifecycleSettingsDiffAction performActionsForCanvas:withUpdatedScene:settingsDiff:fromSettings:transitionContext:]_block_invoke + 221
23 UIKit 0x000000011035e387 _performActionsWithDelayForTransitionContext + 100
24 UIKit 0x00000001101634f7 -[_UICanvasLifecycleSettingsDiffAction performActionsForCanvas:withUpdatedScene:settingsDiff:fromSettings:transitionContext:] + 223
25 UIKit 0x000000010fedffb0 -[_UICanvas scene:didUpdateWithDiff:transitionContext:completion:] + 392
26 UIKit 0x000000010f749f0c -[UIApplication workspace:didCreateScene:withTransitionContext:completion:] + 515
27 UIKit 0x000000010fd1ca97 -[UIApplicationSceneClientAgent scene:didInitializeWithEvent:completion:] + 361
28 FrontBoardServices 0x00000001163932f3 -[FBSSceneImpl _didCreateWithTransitionContext:completion:] + 331
29 FrontBoardServices 0x000000011639bcfa __56-[FBSWorkspace client:handleCreateScene:withCompletion:]_block_invoke_2 + 225
30 libdispatch.dylib 0x0000000111ee7848 _dispatch_client_callout + 8
31 libdispatch.dylib 0x0000000111eece14 _dispatch_block_invoke_direct + 592
32 FrontBoardServices 0x00000001163c7470 __FBSSERIALQUEUE_IS_CALLING_OUT_TO_A_BLOCK__ + 24
33 FrontBoardServices 0x00000001163c712e -[FBSSerialQueue _performNext] + 439
34 FrontBoardServices 0x00000001163c768e -[FBSSerialQueue _performNextFromRunLoopSource] + 45
35 CoreFoundation 0x000000010f272bb1 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
36 CoreFoundation 0x000000010f2574af __CFRunLoopDoSources0 + 271
37 CoreFoundation 0x000000010f256a6f __CFRunLoopRun + 1263
38 CoreFoundation 0x000000010f25630b CFRunLoopRunSpecific + 635
39 GraphicsServices 0x0000000115019a73 GSEventRunModal + 62
40 UIKit 0x000000010f74d0b7 UIApplicationMain + 159
41 Remote Controller Client 0x000000010c7b8497 main + 55
42 libdyld.dylib 0x000000010f103955 start + 1
43 ??? 0x0000000000000001 0x0 + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
(lldb)
有人能帮我吗？?
最佳答案
setValue接受字典
let video1 = ["Video":"Video1"]
refController.child("nowPlaying").setValue(video1)
或
let video2 = ["Video":"Video2"]
refController.child("nowPlaying").setValue(video2)
关于swift - Xcode Firebase只需写入数据，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/50108214/