I have an audio app and have implemented CarPlay, I've followed this guide to add CarPlay support: https://blog.fethica.com/add-carplay-support-to-swiftradio/#
The app uses the com.apple.developer.playable-content entitlement and Media Player framework, which as far as I know, has been the only way to add CarPlay to audio apps on iOS 13 and below, but is still backwards compatible with iOS 14 (despite there being a new carplay audio framework for iOS 14). All my CarPlay logic is written in an extension of my main AppDelegate (could this be problematic?)
In the simulator, everything has been working fine and the audio plays in the external simulated car display. But my team tested the app in a real car and the application crashes immediately when opened from the car display.
I have the crash log here when tested on iPhone 11 Pro on iOS 14.4:
Exception Type: EXC_BREAKPOINT (SIGTRAP)
Exception Codes: 0x0000000000000001, 0x00000001b88d13cc
Termination Signal: Trace/BPT trap: 5
Termination Reason: Namespace SIGNAL, Code 0x5
Terminating Process: exc handler [27455]
Triggered by Thread: 5
Thread 0 name:
Thread 0:
0 libsystem_kernel.dylib 0x00000001d6aa6f5c __ulock_wait + 8
1 libdispatch.dylib 0x00000001a8746794 _dlock_wait + 56 (lock.c:326)
2 libdispatch.dylib 0x00000001a87466c0 _dispatch_once_wait + 124 (lock.c:382)
3 UIKitCore 0x00000001ab1080f8 -[_UIApplicationConfigurationLoader _loadInitializationContext] + 152 (once.h:84)
4 UIKitCore 0x00000001ab108444 -[_UIApplicationConfigurationLoader applicationInitializationContext] + 32 (_UIApplicationConfigurationLoader.m:161)
5 UIKitCore 0x00000001ab0ef05c -[_UIScreenInitialDisplayConfigurationLoader initialDisplayContext] + 180 (UIScreen.m:371)
6 UIKitCore 0x00000001ab0ef348 +[UIScreen initialize] + 128 (UIScreen.m:626)
7 libobjc.A.dylib 0x00000001bdb67c58 CALLING_SOME_+initialize_METHOD + 24 (objc-initialize.mm:384)
8 libobjc.A.dylib 0x00000001bdb6e318 initializeNonMetaClass + 716 (objc-initialize.mm:554)
9 libobjc.A.dylib 0x00000001bdb6f910 initializeAndMaybeRelock(objc_class*, objc_object*, mutex_tt<false>&, bool) + 280 (objc-runtime-new.mm:2221)
10 libobjc.A.dylib 0x00000001bdb7e498 lookUpImpOrForward + 956 (objc-runtime-new.mm:2237)
11 libobjc.A.dylib 0x00000001bdb68524 _objc_msgSend_uncached + 68
12 UIKitCore 0x00000001ab33ef48 -[_UIRemoteKeyboards keyboardWindow] + 52 (_UIRemoteKeyboards.m:2036)
13 UIKitCore 0x00000001ab33cf6c -[_UIRemoteKeyboards allowedToShowKeyboard] + 96 (_UIRemoteKeyboards.m:1588)
14 UIKitCore 0x00000001ab33bda8 -[_UIRemoteKeyboards checkConnection] + 64 (_UIRemoteKeyboards.m:1315)
15 UIKitCore 0x00000001ab338b60 -[_UIRemoteKeyboards init] + 156 (_UIRemoteKeyboards.m:797)
16 UIKitCore 0x00000001ab338ab4 __43+[_UIRemoteKeyboards sharedRemoteKeyboards]_block_invoke + 20 (_UIRemoteKeyboards.m:785)
17 libdispatch.dylib 0x00000001a8745db0 _dispatch_client_callout + 20 (object.m:559)
18 libdispatch.dylib 0x00000001a87475c8 _dispatch_once_callout + 32 (once.c:52)
19 UIKitCore 0x00000001ab338a9c +[_UIRemoteKeyboards sharedRemoteKeyboards] + 176 (once.h:84)
20 UIKitCore 0x00000001ab50ccac _UIApplicationMainPreparations + 1348 (UIApplication.m:4644)
21 UIKitCore 0x00000001ab50c740 UIApplicationMain + 140 (UIApplication.m:4704)
22 MyAppName 0x000000010458fb04 main + 68 (UITextField+Extension.swift:22)
23 libdyld.dylib 0x00000001a87866b0 start + 4
Thread 1:
0 libsystem_pthread.dylib 0x00000001f4608764 start_wqthread + 0
Thread 2:
0 libsystem_pthread.dylib 0x00000001f4608764 start_wqthread + 0
Thread 3 name:
Thread 3:
0 libsystem_kernel.dylib 0x00000001d6a822d0 mach_msg_trap + 8
1 libsystem_kernel.dylib 0x00000001d6a81660 mach_msg + 76 (mach_msg.c:103)
2 libdispatch.dylib 0x00000001a875e888 _dispatch_mach_send_and_wait_for_reply + 528 (mach.c:812)
3 libdispatch.dylib 0x00000001a875ec24 dispatch_mach_send_with_result_and_wait_for_reply + 56 (mach.c:1998)
4 libxpc.dylib 0x00000001f4626e68 xpc_connection_send_message_with_reply_sync + 240 (connection.c:848)
5 BoardServices 0x00000001c2599958 -[BSXPCServiceConnectionMessage _sendSynchronously:] + 332 (BSXPCServiceConnectionMessage.m:129)
6 BoardServices 0x00000001c259a2cc -[BSXPCServiceConnectionMessage sendSynchronouslyWithError:] + 256 (BSXPCServiceConnectionMessage.m:182)
7 BoardServices 0x00000001c2584afc __71+[BSXPCServiceConnectionProxy createImplementationOfProtocol:forClass:]_block_invoke + 824 (BSXPCServiceConnectionProxy.m:274)
8 UIKitServices 0x00000001acb7fc6c -[UISApplicationSupportClient applicationInitializationContextWithParameters:] + 272 (UISApplicationSupportClient.m:77)
9 UIKitCore 0x00000001ab108278 __63-[_UIApplicationConfigurationLoader _loadInitializationContext]_block_invoke_2 + 228 (_UIApplicationConfigurationLoader.m:135)
10 UIKitCore 0x00000001ab108188 __UIAPPLICATION_IS_LOADING_INITIALIZATION_INFO_FROM_THE_SYSTEM__ + 28 (_UIApplicationConfigurationLoader.m:30)
11 UIKitCore 0x00000001ab108160 __63-[_UIApplicationConfigurationLoader _loadInitializationContext]_block_invoke + 100 (_UIApplicationConfigurationLoader.m:106)
12 libdispatch.dylib 0x00000001a8745db0 _dispatch_client_callout + 20 (object.m:559)
13 libdispatch.dylib 0x00000001a87475c8 _dispatch_once_callout + 32 (once.c:52)
14 UIKitCore 0x00000001ab1080f8 -[_UIApplicationConfigurationLoader _loadInitializationContext] + 152 (once.h:84)
15 UIKitCore 0x00000001ab108408 __70-[_UIApplicationConfigurationLoader startPreloadInitializationContext]_block_invoke + 28 (_UIApplicationConfigurationLoader.m:154)
16 libdispatch.dylib 0x00000001a874424c _dispatch_call_block_and_release + 32 (init.c:1454)
17 libdispatch.dylib 0x00000001a8745db0 _dispatch_client_callout + 20 (object.m:559)
18 libdispatch.dylib 0x00000001a8756a68 _dispatch_root_queue_drain + 656 (inline_internal.h:2548)
19 libdispatch.dylib 0x00000001a8757120 _dispatch_worker_thread2 + 116 (queue.c:6777)
20 libsystem_pthread.dylib 0x00000001f46017d8 _pthread_wqthread + 216 (pthread.c:2223)
21 libsystem_pthread.dylib 0x00000001f460876c start_wqthread + 8
Thread 4:
0 libsystem_pthread.dylib 0x00000001f4608764 start_wqthread + 0
Thread 5 name:
Thread 5 Crashed:
0 FrontBoardServices 0x00000001b88d13cc -[FBSSceneParameters initWithSpecification:] + 228 (FBSSceneParameters.m:34)
1 FrontBoardServices 0x00000001b88d1320 -[FBSSceneParameters initWithSpecification:] + 56 (FBSSceneParameters.m:34)
2 FrontBoardServices 0x00000001b88d1dd8 -[FBSSceneParameters initWithXPCDictionary:] + 128 (FBSSceneParameters.m:150)
3 BaseBoard 0x00000001ad165af4 _BSXPCDecodeObject + 1892 (BSXPCCoder.m:583)
4 BaseBoard 0x00000001ad1639c0 _BSXPCDecodeObjectForKey + 268 (BSXPCCoder.m:459)
5 BoardServices 0x00000001c2585f30 +[BSXPCServiceConnectionProxy decodeArguments:outArgs:fromMessage:forConnection:] + 1608 (BSXPCServiceConnectionProxy.m:592)
6 BoardServices 0x00000001c2583ab0 -[BSXPCServiceConnectionProxy invokeMessage:onTarget:] + 276 (BSXPCServiceConnectionProxy.m:342)
7 BoardServices 0x00000001c258a994 __63-[BSXPCServiceConnectionEventHandler connection:handleMessage:]_block_invoke + 536 (BSXPCServiceConnectionEventHandler.m:261)
8 BoardServices 0x00000001c25a0284 BSXPCServiceConnectionExecuteCallOut + 316 (BSXPCServiceConnection.m:1049)
9 BoardServices 0x00000001c258a708 -[BSXPCServiceConnectionEventHandler connection:handleMessage:] + 172 (BSXPCServiceConnectionEventHandler.m:250)
10 BoardServices 0x00000001c259f668 -[BSXPCServiceConnection _connection_handleMessage:fromPeer:withHandoff:] + 572 (BSXPCServiceConnection.m:834)
11 libdispatch.dylib 0x00000001a874424c _dispatch_call_block_and_release + 32 (init.c:1454)
12 libdispatch.dylib 0x00000001a8745db0 _dispatch_client_callout + 20 (object.m:559)
13 libdispatch.dylib 0x00000001a874d10c _dispatch_lane_serial_drain + 580 (inline_internal.h:2548)
14 libdispatch.dylib 0x00000001a874dc90 _dispatch_lane_invoke + 460 (queue.c:3862)
15 libdispatch.dylib 0x00000001a874cfd8 _dispatch_lane_serial_drain + 272 (inline_internal.h:2589)
16 libdispatch.dylib 0x00000001a874dc90 _dispatch_lane_invoke + 460 (queue.c:3862)
17 libdispatch.dylib 0x00000001a8757d78 _dispatch_workloop_worker_thread + 708 (queue.c:6601)
18 libsystem_pthread.dylib 0x00000001f4601814 _pthread_wqthread + 276 (pthread.c:2210)
19 libsystem_pthread.dylib 0x00000001f460876c start_wqthread + 8
Thread 6 name:
Thread 6:
0 libsystem_kernel.dylib 0x00000001d6a822d0 mach_msg_trap + 8
1 libsystem_kernel.dylib 0x00000001d6a81660 mach_msg + 76 (mach_msg.c:103)
2 IOKit 0x00000001b3b68340 io_hideventsystem_copy_property + 172 (IOHIDEventSystemMIGUser.c:3056)
3 IOKit 0x00000001b3b22c60 IOHIDEventSystemClientCopyProperty + 128 (IOHIDEventSystemClient.c:1097)
4 IOKit 0x00000001b3b22354 __IOHIDEventSystemClientRefresh + 1148 (IOHIDEventSystemClient.c:539)
5 IOKit 0x00000001b3b230cc IOHIDEventSystemClientCreateWithType + 856 (IOHIDEventSystemClient.c:749)
6 BackBoardServices 0x00000001ac0dda88 ___getHIDEventSystemClient_block_invoke + 288 (BKSHIDEvent.m:93)
7 libdispatch.dylib 0x00000001a8745db0 _dispatch_client_callout + 20 (object.m:559)
8 libdispatch.dylib 0x00000001a87475c8 _dispatch_once_callout + 32 (once.c:52)
9 BackBoardServices 0x00000001ac0dd964 BKSHIDEventRegisterEventCallbackOnRunLoop + 152 (once.h:84)
10 UIKitCore 0x00000001ab5babe4 -[UIEventFetcher threadMain] + 416 (UIEventFetcher.m:720)
11 Foundation 0x00000001a9ee7a34 __NSThread__start__ + 864 (NSThread.m:724)
12 libsystem_pthread.dylib 0x00000001f45ffcb0 _pthread_start + 320 (pthread.c:881)
13 libsystem_pthread.dylib 0x00000001f4608778 thread_start + 8
Thread 7:
0 libsystem_pthread.dylib 0x00000001f4608764 start_wqthread + 0
Thread 5 crashed with ARM Thread State (64-bit):
x0: 0x000000020ba16880 x1: 0x000000020ba16880 x2: 0x0000000000000000 x3: 0x00000000000008fd
x4: 0x0000000000000000 x5: 0x00000001bdb9873e x6: 0x000000000000006e x7: 0x0000000000000fb0
x8: 0x85f836c8121c001f x9: 0x85f836c8121c001f x10: 0x0000000000005403 x11: 0x0000000281a71540
x12: 0x00000000000000aa x13: 0x0000000000000001 x14: 0x00000000000000ac x15: 0x0000000000000182
x16: 0x00000002c6d90f88 x17: 0x0000000208ac3dc8 x18: 0x0000000000000000 x19: 0x0000000000000000
x20: 0x0000000281472eb0 x21: 0x0000000000000000 x22: 0x0000000000000000 x23: 0x00000001f75f31f5
x24: 0x000000020ba160d8 x25: 0x0000000000000000 x26: 0x00000001f7ff3288 x27: 0x000000020ba160b0
x28: 0x0000000000000000 fp: 0x000000016bb2e130 lr: 0x86106081b88d1320
sp: 0x000000016bb2e100 pc: 0x00000001b88d13cc cpsr: 0x60000000
esr: 0xf2000000 Address size fault
What could be causing the app to crash in a real car but work fine in the simulator? Here is part of my AppDelegate where I call a function to setup carplay:
import UIKit
import AVFoundation
import AVKit
import GoogleInteractiveMediaAds
import MediaPlayer
import GoogleMobileAds
import UserNotifications
import WebKit
import SafariServices
import Hero
import Firebase
#UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
static let reachable = "Reachable"
static let unReachable = "UnReachable"
let reachability = try! Reachability()
var iOSStream: String?
var preRolladUrl: String?
var window: UIWindow?
var adType: String?
var adServer: String?
var adFeed: String?
var miniPlayer: PlayerPopupControlViewController?
var selectedStation: Players!
// CarPlay
var playableContentManager: MPPlayableContentManager?
let carplayPlaylist = CarPlayPlaylist()
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
UINavigationBar.appearance().barTintColor = UIColor.black
UINavigationBar.appearance().tintColor = UIColor.black
UINavigationBar.appearance().titleTextAttributes = [NSAttributedString.Key.foregroundColor: UIColor.white]
UINavigationBar.appearance().isTranslucent = false
if UserDefaults.standard.object(forKey: UserDefaultsConstants.resumeRadioInBackground) == nil {
UserDefaults.standard.set(true, forKey: UserDefaultsConstants.resumeRadioInBackground)
UserDefaults.standard.synchronize()
}
self.setupBaseURL()
// Override point for customization after application launch.
self.startObservingReachability()
UIApplication.shared.beginReceivingRemoteControlEvents()
do {
try AVAudioSession.sharedInstance().setCategory(AVAudioSession.Category.playback)
try AVAudioSession.sharedInstance().setActive(true)
} catch {
AppLogger.error(error)
}
UNUserNotificationCenter.current().delegate = self
UserDefaults.standard.set(false, forKey: UserDefaultsConstants.isMiniPlayerDisplayed)
UserDefaults.standard.synchronize()
SettingsDataManager.sharedInstance.selectedStation = SettingsDataManager.sharedInstance.getSelectedStationFromUserDefaults()
registerForPushNotifications()
setupCarPlay()
FirebaseApp.configure()
return true
}
AppDelegate+CarPlay.swift
import Foundation
import MediaPlayer
extension AppDelegate{
func setupCarPlay() {
playableContentManager = MPPlayableContentManager.shared()
playableContentManager?.delegate = self
playableContentManager?.dataSource = self
self.carplayPlaylist.setupCommandCenter()
}
}
extension AppDelegate: MPPlayableContentDelegate {
// This is called when user selects a 'playable' item (MPContentItem)
func playableContentManager(_ contentManager: MPPlayableContentManager, initiatePlaybackOfContentItemAt indexPath: IndexPath, completionHandler: #escaping (Error?) -> Void) {
self.carplayPlaylist.playerData = SettingsDataManager.sharedInstance.playerData ?? []
// guard let miniPlayer = self.miniPlayer else {return}
DispatchQueue.main.async {
// App should play music either from the radio stream or podcasts
if indexPath.count == 2 {
if(indexPath[0] == 0) {
// When user selects playable item within Radio tab
if (self.carplayPlaylist.playerData.count > 0) {
if let stationURL = URL(string: self.carplayPlaylist.playerData[indexPath[1]].streams?.iOS ?? "") {
self.carplayPlaylist.play(playURL: stationURL)
SettingsDataManager.sharedInstance.selectedStation = self.carplayPlaylist.playerData[indexPath[1]]
}
}
}
}
completionHandler(nil)
// Workaround to make the Now Playing working on the simulator:
#if targetEnvironment(simulator)
UIApplication.shared.endReceivingRemoteControlEvents()
UIApplication.shared.beginReceivingRemoteControlEvents()
#endif
}
}
func beginLoadingChildItems(at indexPath: IndexPath, completionHandler: #escaping (Error?) -> Void) {
carplayPlaylist.load { error in
completionHandler(error)
}
}
}
extension AppDelegate: MPPlayableContentDataSource {
func numberOfChildItems(at indexPath: IndexPath) -> Int {
if indexPath.indices.count == 0 {
// This returns the number of tabs at the top of the CarPlay display
return 1 // changed to 1 to allow only radio streams
} else if indexPath.indices.count == 1 {
// This returns the number of rows within each tab
if indexPath[0] == 0 {
// Radio Stations rows
return carplayPlaylist.playerData.count
} else {
// Podcasts feed rows
return 0 // Return 0 while podcasts are disabled
}
} else {
return 0
}
}
func contentItem(at indexPath: IndexPath) -> MPContentItem? {
let playerData = carplayPlaylist.playerData
// let podCastsFeeds = carplayPlaylist.podCastSettings?.podcasts_feeds
if indexPath.count == 1 {
// Tab section
let item: MPContentItem
if (indexPath[0] == 0) {
// Radio Stations Tab Section
item = MPContentItem(identifier: "Radio")
item.title = "Radio"
item.artwork = MPMediaItemArtwork(boundsSize: #imageLiteral(resourceName: "NavIcon-Broadcast").size, requestHandler: { _ -> UIImage in
return #imageLiteral(resourceName: "NavIcon-Broadcast")
})
} else {
// Podcast Tab Section
item = MPContentItem(identifier: "Podcasts")
item.title = "Podcasts"
item.artwork = MPMediaItemArtwork(boundsSize: #imageLiteral(resourceName: "NavIcon-Podcasts").size, requestHandler: { _ -> UIImage in
return #imageLiteral(resourceName: "NavIcon-Podcasts")
})
}
item.isContainer = true
item.isPlayable = false
return item
} else if indexPath.count == 2, indexPath.item < playerData.count, indexPath[0] == 0 {
// Radio station items section
let station = playerData[indexPath.item]
let item = MPContentItem(identifier: "\(station.name)")
item.title = station.name
item.subtitle = station.call_letters
item.isPlayable = true
item.isStreamingContent = true
item.downloadImageAndSetArtwork(from: station.logo ?? "", completion: {})
return item
} else {
return nil
}
}
}
///extension to downlaod the image from the api
extension MPContentItem {
func getData(from url: URL, completion: #escaping (Data?, URLResponse?, Error?) -> ()) {
URLSession.shared.dataTask(with: url, completionHandler: completion).resume()
}
func downloadImageAndSetArtwork(from address: String, completion: #escaping () -> Void) {
let defaultImage = #imageLiteral(resourceName: "NavIcon-Music")
let defaultArtwork = MPMediaItemArtwork(boundsSize: defaultImage.size, requestHandler: { _ -> UIImage in
return defaultImage
})
guard let url = URL(string: address) else {
self.artwork = defaultArtwork
return
}
getData(from: url) {
data, response, error in
guard let data = data, error == nil else {
AppLogger.error("Image Error")
self.artwork = defaultArtwork
return
}
DispatchQueue.main.async() {
guard let image = UIImage(data: data) else {
self.artwork = defaultArtwork
return
}
self.artwork = MPMediaItemArtwork(boundsSize: image.size, requestHandler: { _ -> UIImage in
return image
})
completion()
}
}
}
}
CarPlayPlaylist.swift
import Foundation
//import UIKit
import AVKit
import MediaPlayer
class CarPlayPlaylist {
let radioPlayer = FRadioPlayer.shared
var playerData: [Players] = []
var podCastItemsArray: [[Item]] = []
var podCastSettings: Podcast_settings?
var podCastFeedNameArray:[String] = []
var isFromCarPlay: Bool = false
var playButtonStatus: Bool = false
var currentPodcastItem: Item?
func load(_ completion: #escaping (Error?) -> Void) {
// if (self.podCastFeedNameArray.count == 0 && self.podCastItemsArray.count == 0) {
// getPodcastDataFromSettingsDataManager()
//
// let podcastFeedsCount = self.podCastSettings?.podcasts_feeds?.count ?? 0
// podCastItemsArray = [[Item]](repeating: [], count: podcastFeedsCount)
// }
self.playerData = SettingsDataManager.sharedInstance.playerData ?? []
completion(nil)
}
func play (playURL: URL) {
isFromCarPlay = true
self.radioPlayer.radioURL = playURL
self.radioPlayer.play()
}
func setupCommandCenter () {
MPNowPlayingInfoCenter.default().nowPlayingInfo = [MPMediaItemPropertyTitle: "Current Playing song"]
MPNowPlayingInfoCenter.default().nowPlayingInfo![MPNowPlayingInfoPropertyPlaybackRate] = 0.0
let commandCenter = MPRemoteCommandCenter.shared()
commandCenter.playCommand.isEnabled = true
commandCenter.pauseCommand.isEnabled = true
commandCenter.playCommand.addTarget { [weak self] (event) -> MPRemoteCommandHandlerStatus in
self?.radioPlayer.play()
// NotificationCenter.default.post(name: NSNotification.Name(rawValue: NotificationCenterConstants.carPlayDidPlay), object: nil, userInfo: nil)
return .success
}
commandCenter.pauseCommand.addTarget { [weak self] (event) -> MPRemoteCommandHandlerStatus in
self?.radioPlayer.pause()
// NotificationCenter.default.post(name: NSNotification.Name(rawValue: NotificationCenterConstants.carPlayDidPause), object: nil, userInfo: nil)
return .success
}
}
}
extension CarPlayPlaylist {
func addCommandCenterNotificationObservers() {
NotificationCenter.default.addObserver(self, selector: #selector(commandCenterDidPlay), name: NSNotification.Name(rawValue: NotificationCenterConstants.commandCenterDidPlay), object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(commandCenterDidPause), name: NSNotification.Name(rawValue: NotificationCenterConstants.commandCenterDidPause), object: nil)
}
func removeCommandCenterObservers() {
NotificationCenter.default.removeObserver(self, name: NSNotification.Name(rawValue: NotificationCenterConstants.commandCenterDidPlay), object: nil)
NotificationCenter.default.removeObserver(self, name: NSNotification.Name(rawValue: NotificationCenterConstants.commandCenterDidPause), object: nil)
}
#objc func commandCenterDidPlay() {
// Playback rate should change the playback status
MPNowPlayingInfoCenter.default().nowPlayingInfo?[MPNowPlayingInfoPropertyPlaybackRate] = 0.0
}
#objc func commandCenterDidPause() {
// Playback rate should change the playback status
MPNowPlayingInfoCenter.default().nowPlayingInfo?[MPNowPlayingInfoPropertyPlaybackRate] = 1.0
}
}
Related
Crashes are reported into firebase console. Can anyone help me. i am sending data to server using Socket.
Here is crash description:
Crashed: com.apple.main-thread
0 AppName 0x10ef40 partial apply for closure #2 in sendDataRecursively() + 4329697088 (swift:4329697088)
1 AppName 0x23824 thunk for #escaping #callee_guaranteed () -> () + 4328732708 (<compiler-generated>:4328732708)
2 libdispatch.dylib 0x1e68 _dispatch_call_block_and_release + 32
3 libdispatch.dylib 0x3a2c _dispatch_client_callout + 20
4 libdispatch.dylib 0x11f48 _dispatch_main_queue_drain + 928
5 libdispatch.dylib 0x11b98 _dispatch_main_queue_callback_4CF + 44
6 CoreFoundation 0x522f0
CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 16
7 CoreFoundation 0xc1f4 __CFRunLoopRun + 2532
8 CoreFoundation 0x1f6b8 CFRunLoopRunSpecific + 600
9 GraphicsServices 0x1374 GSEventRunModal + 164
10 UIKitCore 0x513e88 -[UIApplication _run] + 1100
11 UIKitCore 0x2955ec UIApplicationMain + 364
12 AppName 0x48dac main + 17 (AppDelegate.swift:17)
13 ??? 0x1008edce4 (Missing)
Here is my function:
#objc func sendDataRecursively() {
let reachability = try! Reachability()
if reachability.connection != .unavailable {
DispatchQueue.global(qos: .userInitiated).async { //previous .bakground
if self.msgCnt == 127 {
self.msgCnt = 0
}
self.msgCnt += 1
self.sendRequest()
}
} else {
DispatchQueue.main.async {
self.previousStatusWhenDisconnect = self.motionDetectionLbl?.text ?? ""
self.appDelegate.statusLbl?.text = String(format: "%# %#", (self.appDelegate.statusLbl?.text)!, StartVCStringsEnglish.disConnectedString)
}
self.networkTimer = Timer.scheduledTimer(timeInterval: 1, target: self, selector: #selector(self.checkNetworkRecursively), userInfo: nil, repeats: true)
}
}
Here is the my other function. i am sending data to my Socket function. i did't got the crash but its reported into firebase. Also in firebase has not much more information about the crash. its just show the function name only.
private func sendRequest() {
self.calculateMessageData()
var requestData: Data?
var txData = [UInt8()]
var crc: Int
if self.msgID == Int8(EnMessageType.basicSafetyMessage.rawValue) {
requestData = self.getBasicSafetyMessage()
} else {
requestData = self.getPersonalSafetyMessage()
}
crc = computeCRC(data: requestData!, length: requestData!.count)
// wrap data in 7E, do byte stuffing and add CRC
txData = []
txData.append(0x7E)
for ii in 0..<requestData!.count {
switch requestData![ii] {
case 0x7D:
txData.append(0x7D)
txData.append(0x5D)
break
case 0x7E:
txData.append(0x7D)
txData.append(0x5E)
break
default:
txData.append(requestData![ii])
break
}
}
txData.append((UInt8)(crc >> 8))
txData.append((UInt8)(crc & 0xFF))
txData.append(0x7E)
requestData = (Data)(txData)
if AppSingletonVariable.sharedInstance.isConnected == true { AppSingletonVariable.sharedInstance.mySocket.sendDataToServer(reqData: requestData!)
}
}
Thanks,
You can see from the crash description that there is issue in 2nd closure in sendDataRecursively() function:
DispatchQueue.main.async {
self.previousStatusWhenDisconnect = self.motionDetectionLbl?.text ?? ""
self.appDelegate.statusLbl?.text = String(format: "%# %#", (self.appDelegate.statusLbl?.text)!, StartVCStringsEnglish.disConnectedString)
}
self.networkTimer = Timer.scheduledTimer(timeInterval: 1, target: self, selector: #selector(self.checkNetworkRecursively), userInfo: nil, repeats: true)
The issue is probably '!' in this expression:
(self.appDelegate.statusLbl?.text)!
If statusLbl is nil, this code crashes. As it was mentioned in comment, it's not safe to force unwrap optionals and this is the reason.
Replace your closure with this:
DispatchQueue.main.async {
self.previousStatusWhenDisconnect = self.motionDetectionLbl?.text ?? ""
if let text = self.appDelegate.statusLbl?.text {
self.appDelegate.statusLbl?.text = String(format: "%# %#", text, StartVCStringsEnglish.disConnectedString)
}
}
self.networkTimer = Timer.scheduledTimer(timeInterval: 1, target: self, selector: #selector(self.checkNetworkRecursively), userInfo: nil, repeats: true)
I am trying to implement a table view that displays books information in every cell. I get this information from the API. Here is my code:
class ViewController: UIViewController {
#IBOutlet weak var allBooksTable: UITableView!
var bookList:myList? = nil {
didSet {
allBooksTable.reloadData()
}
}
override func viewDidLoad() {
super.viewDidLoad()
self.allBooksTable.dataSource = self
self.allBooksTable.delegate = self
let url = URL(string: "https://ipvefa0rg0.execute-api.us-east-1.amazonaws.com/dev/books?lang=fr&term=self")!
var request = URLRequest(url: url)
request.setValue(
"jFXzWHx7SkK6",
forHTTPHeaderField: "api-key"
)
request.httpMethod = "GET"
let session = URLSession.shared
let task = session.dataTask(with: request) { (data, response, error) in
if let error = error {
print(error.localizedDescription)
} else if let data = data {
do {
let decodedData = try JSONDecoder().decode(myList.self,
from: data)
self.bookList = decodedData
print("user: ", decodedData.list[0].imageLinks.thumbnail)
print("===================================")
} catch let DecodingError.dataCorrupted(context) {
print(context)
} catch let DecodingError.keyNotFound(key, context) {
print("Key '\(key)' not found:", context.debugDescription)
//print("codingPath:", context.codingPath)
} catch let DecodingError.valueNotFound(value, context) {
print("Value '\(value)' not found:", context.debugDescription)
print("codingPath:", context.codingPath)
} catch let DecodingError.typeMismatch(type, context) {
print("Type '\(type)' mismatch:", context.debugDescription)
print("codingPath:", context.codingPath)
} catch {
print("error: ", error)
}
} else {
// Handle unexpected error
}
}
task.resume()
}
}
extension ViewController: UITableViewDataSource , UITableViewDelegate {
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 10
}
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
return 200
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "myCell") as! bookTableViewCell
cell.bookName.text = bookList?.list[indexPath.row].title
if bookList?.list[indexPath.row].imageLinks.smallThumbnail != nil{
//cell.img.load(url: (bookList?.list[indexPath.row].imageLinks.smallThumbnail)!)
print((bookList?.list[indexPath.row].imageLinks.smallThumbnail)!)
cell.img.downloaded(from: (bookList?.list[indexPath.row].imageLinks.smallThumbnail)!)
}
return cell
}
}
extension UIImageView {
func downloaded(from url: URL, contentMode mode: UIView.ContentMode = .scaleAspectFit) {
contentMode = mode
URLSession.shared.dataTask(with: url) { data, response, error in
guard
let httpURLResponse = response as? HTTPURLResponse, httpURLResponse.statusCode == 200,
let mimeType = response?.mimeType, mimeType.hasPrefix("image"),
let data = data, error == nil,
let image = UIImage(data: data)
else { return }
DispatchQueue.main.async() { [weak self] in
self?.image = image
}
}.resume()
}
func downloaded(from link: String, contentMode mode: UIView.ContentMode = .scaleAspectFit) {
guard let url = URL(string: link) else { return }
downloaded(from: url, contentMode: mode)
}
}
When I run the app, it only shows my the first book and then crashes with the following error.
2020-10-15 23:12:00.953424+1100 MSA[50129:2517792] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Modifications to the layout engine must not be performed from a background thread after it has been accessed from the main thread.'
*** First throw call stack:
(
0 CoreFoundation 0x00007fff2043a126 __exceptionPreprocess + 242
1 libobjc.A.dylib 0x00007fff20177f78 objc_exception_throw + 48
2 CoreAutoLayout 0x00007fff58010d41 -[NSISEngine tryToOptimizeReturningMutuallyExclusiveConstraints] + 0
3 CoreAutoLayout 0x00007fff58010fcd -[NSISEngine withBehaviors:performModifications:] + 25
4 UIKitCore 0x00007fff24ac64ad -[UIView(AdditionalLayoutSupport) _recursiveUpdateConstraintsIfNeededCollectingViews:forSecondPass:] + 112
5 UIKitCore 0x00007fff24ac6136 -[UIView(AdditionalLayoutSupport) _updateConstraintsIfNeededCollectingViews:forSecondPass:] + 827
6 UIKitCore 0x00007fff24ac6a08 __100-[UIView(AdditionalLayoutSupport) _updateConstraintsIfNeededWithViewForVariableChangeNotifications:]_block_invoke + 85
7 UIKitCore 0x00007fff24ac6594 -[UIView(AdditionalLayoutSupport) _updateConstraintsIfNeededWithViewForVariableChangeNotifications:] + 154
8 UIKitCore 0x00007fff24ac7482 -[UIView(AdditionalLayoutSupport) _updateConstraintsAtEngineLevelIfNeededWithViewForVariableChangeNotifications:] + 393
9 UIKitCore 0x00007fff24ba9ad6 -[UIView _updateConstraintsAsNecessaryAndApplyLayoutFromEngine] + 275
10 UIKitCore 0x00007fff24bbda37 -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 2979
11 QuartzCore 0x00007fff27a3dd87 -[CALayer layoutSublayers] + 258
12 QuartzCore 0x00007fff27a44239 _ZN2CA5Layer16layout_if_neededEPNS_11TransactionE + 575
13 UIKitCore 0x00007fff24ba8fe9 -[UIView(Hierarchy) layoutBelowIfNeeded] + 573
14 UIKitCore 0x00007fff24bb0479 +[UIView(Animation) performWithoutAnimation:] + 84
15 UIKitCore 0x00007fff248954d0 -[UITableView _createPreparedCellForGlobalRow:withIndexPath:willDisplay:] + 1300
16 UIKitCore 0x00007fff2485e8bb -[UITableView _updateVisibleCellsNow:] + 2942
17 UIKitCore 0x00007fff2487e6e6 -[UITableView layoutSubviews] + 237
18 UIKitCore 0x00007fff24bbd9ce -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 2874
19 QuartzCore 0x00007fff27a3dd87 -[CALayer layoutSublayers] + 258
20 QuartzCore 0x00007fff27a44239 _ZN2CA5Layer16layout_if_neededEPNS_11TransactionE + 575
21 QuartzCore 0x00007fff27a4ff91 _ZN2CA5Layer28layout_and_display_if_neededEPNS_11TransactionE + 65
22 QuartzCore 0x00007fff27990078 _ZN2CA7Context18commit_transactionEPNS_11TransactionEdPd + 496
23 QuartzCore 0x00007fff279c6e13 _ZN2CA11Transaction6commitEv + 783
24 QuartzCore 0x00007fff279c7616 _ZN2CA11Transaction14release_threadEPv + 210
25 libsystem_pthread.dylib 0x00007fff5dcda054 _pthread_tsd_cleanup + 551
26 libsystem_pthread.dylib 0x00007fff5dcdc512 _pthread_exit + 70
27 libsystem_pthread.dylib 0x00007fff5dcd9ddd _pthread_wqthread_exit + 77
28 libsystem_pthread.dylib 0x00007fff5dcd8afc _pthread_wqthread + 481
29 libsystem_pthread.dylib 0x00007fff5dcd7b77 start_wqthread + 15
)
libc++abi.dylib: terminating with uncaught exception of type NSException
Could you please help me to understand what's going on here? I have looked over for similar threads, but most of the solutions are specific to the question.
if a UIElement getting update in background thread thats why applications getting crashed so whenever you want to update UI you need to update that UI Element in main thread, and your session data task is running in background thread and there you set the value bookList but when bookList is set there is an property observer which is reload the tableview in background thread so there is two solutions.
inside your api calling functions you need to set the property in main thread like this:-
DispatchQueue.main.async {
self.bookList = decodedData
}
inside your property observer you need to do like that
var bookList:myList? = nil {
didSet {
DispatchQueue.main.async {
allBooksTable.reloadData()
}
}
}
Enjoy:-
The issue is that you set bookList from a background thread (since URLSession.dataTask calls its completion on a background thread) and in the didSet of bookList, you update the UI. You should dispatch the UI update to the main thread.
var bookList:myList? = nil {
didSet {
DispatchQueue.main.async {
allBooksTable.reloadData()
}
}
}
You can set the bookList on main thread like below...
DispatchQueue.main.async {
self.bookList = decodedData
}
The crash that has occurred is :-
Crashed: com.apple.main-thread
EXC_BREAKPOINT 0x00000001004c6514
Here is the stack race for the crash :-
Crashed: com.apple.main-thread
0 Quickride 0x1004c6514 specialized static HttpUtils.putJSONRequestWithBody(url:targetViewController:handler:body:) (HttpUtils.swift:173)
1 Quickride 0x100464958 specialized static UserRestClient.saveDeviceToken(targetViewController:requestBody:completionHandler:) (UserRestClient.swift:421)
2 Quickride 0x100746da8 DeviceRegistrationHelper.registerDeviceTokenWithQRServer() (DeviceRegistrationHelper.swift:33)
3 Quickride 0x1007fef14 specialized AppDelegate.application(_:didRegisterForRemoteNotificationsWithDeviceToken:) (AppDelegate.swift:315)
4 Quickride 0x1007f3714 #objc AppDelegate.application(_:didRegisterForRemoteNotificationsWithDeviceToken:) (AppDelegate.swift)
5 FBSDKCoreKit 0x101b350f4 fb_swizzledMethod_4 + 140
6 libdispatch.dylib 0x2284a56c8 _dispatch_call_block_and_release + 24
7 libdispatch.dylib 0x2284a6484 _dispatch_client_callout + 16
8 libdispatch.dylib 0x2284529b4 _dispatch_main_queue_callback_4CF$VARIANT$mp + 1068
9 CoreFoundation 0x2289fbdd0 __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 12
10 CoreFoundation 0x2289f6c98 __CFRunLoopRun + 1964
11 CoreFoundation 0x2289f61cc CFRunLoopRunSpecific + 436
12 GraphicsServices 0x22ac6d584 GSEventRunModal + 100
13 UIKitCore 0x255af1054 UIApplicationMain + 212
14 Quickride 0x10043568c main (AppDelegate.swift:29)
15 libdyld.dylib 0x2284b6bb4 start + 4
The code where the crash had occurred is :-
static func putJSONRequestWithBody(url: String, targetViewController: UIViewController?, handler: #escaping RiderRideRestClient.responseJSONCompletionHandler,body : Dictionary<String, String>){
AppDelegate.getAppDelegate().log.debug("")
var authHeader = [String: String]()
if SharedPreferenceHelper.getJWTAuthenticationToken() != nil{
authHeader[Authorization] = SharedPreferenceHelper.getJWTAuthenticationToken()!
}
}
Here is the code for the app delegate didRegisterForremoteNotification from whre the above part of code is called internally :-
func application(_ application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data) {
AppDelegate.getAppDelegate().log.debug("")
let deviceTokenString = deviceToken.map { String(format: "%02.2hhx", $0) }.joined()
AppDelegate.getAppDelegate().log.debug("\(deviceTokenString)")
userDefaults.setValue(deviceTokenString, forKey: "deviceTokenString")
let phone = QRSessionManager.getInstance()?.getUserId()
if phone != nil && (phone!.count) > 1 && deviceTokenString != nil && !deviceTokenString.isEmpty{
DeviceRegistrationHelper(sourceViewController: nil, phone: phone!, deviceToken: deviceTokenString).registerDeviceTokenWithQRServer()
}
}
I'm trying to create an app that:
Records my microphone and saves the output to a file
Plays the last recorded file
The playback should be manipulated with effects such as pitch-shift
So far I've got 1+2 down, but when I try to assign the AudioKit.output to my timePitch (or PitchShifter for that matter), I get an exception (see below). Can anyone help me out? Seems like if I set output to anything else than player, it crashes..
Disclaimer: I'm new to Swift, so please go easy on me and forgive my bad code
2017-11-08 16:39:58.637075+0100 mysoundplayer[41113:759865] *** Terminating app due to uncaught exception 'com.apple.coreaudio.avfaudio', reason: 'player started when in a disconnected state'
*** First throw call stack:
(
0 CoreFoundation 0x0000000108a3c1ab __exceptionPreprocess + 171
1 libobjc.A.dylib 0x00000001047ddf41 objc_exception_throw + 48
2 CoreFoundation 0x0000000108a41372 +[NSException raise:format:arguments:] + 98
3 AVFAudio 0x000000010b3bb00e _Z19AVAE_RaiseExceptionP8NSStringz + 158
4 AVFAudio 0x000000010b4131ce _ZN21AVAudioPlayerNodeImpl9StartImplEP11AVAudioTime + 204
5 AVFAudio 0x000000010b412482 -[AVAudioPlayerNode playAtTime:] + 82
6 AudioKit 0x0000000103a2270d _T08AudioKit13AKAudioPlayerC4playySo11AVAudioTimeCSg2at_tFTf4gn_n + 1933
7 AudioKit 0x0000000103a1c78d _T08AudioKit13AKAudioPlayerC5startyyF + 45
8 mysoundplayer 0x00000001035dd3b8 _T010mysoundplayer14ViewControllerC14playLoadedFileyyF + 1832
9 mysoundplayer 0x00000001035dca1e _T010mysoundplayer14ViewControllerC4playySo8UIButtonCF + 46
10 mysoundplayer 0x00000001035dca6c _T010mysoundplayer14ViewControllerC4playySo8UIButtonCFTo + 60
11 UIKit 0x000000010507c275 -[UIApplication sendAction:to:from:forEvent:] + 83
12 UIKit 0x00000001051f94a2 -[UIControl sendAction:to:forEvent:] + 67
13 UIKit 0x00000001051f97bf -[UIControl _sendActionsForEvents:withEvent:] + 450
14 UIKit 0x00000001051f81e7 -[UIControl touchesBegan:withEvent:] + 282
15 UIKit 0x00000001050f1916 -[UIWindow _sendTouchesForEvent:] + 2130
16 UIKit 0x00000001050f32de -[UIWindow sendEvent:] + 4124
17 UIKit 0x0000000105096e36 -[UIApplication sendEvent:] + 352
18 UIKit 0x00000001059d9434 __dispatchPreprocessedEventFromEventQueue + 2809
19 UIKit 0x00000001059dc089 __handleEventQueueInternal + 5957
20 CoreFoundation 0x00000001089df231 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
21 CoreFoundation 0x0000000108a7ee41 __CFRunLoopDoSource0 + 81
22 CoreFoundation 0x00000001089c3b49 __CFRunLoopDoSources0 + 185
23 CoreFoundation 0x00000001089c312f __CFRunLoopRun + 1279
24 CoreFoundation 0x00000001089c29b9 CFRunLoopRunSpecific + 409
25 GraphicsServices 0x000000010cc289c6 GSEventRunModal + 62
26 UIKit 0x000000010507a5e8 UIApplicationMain + 159
27 mysoundplayer 0x00000001035e12a7 main + 55
28 libdyld.dylib 0x000000010aa49d81 start + 1
29 ??? 0x0000000000000001 0x0 + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
Source code:
import AudioKit
import AudioKitUI
import UIKit
class ViewController: UIViewController {
var micMixer: AKMixer!
var recorder: AKNodeRecorder!
var player: AKAudioPlayer!
var tape: AKAudioFile!
var timePitch: AKTimePitch!
var pitchShifter: AKPitchShifter!
var mainMixer : AKMixer!
var loadedFile: AKAudioFile!
let mic = AKMicrophone()
var state = State.readyToRecord
enum State {
case readyToRecord
case recording
case readyToPlay
case playing
}
#IBAction func toggleRecord(_ sender: UIButton) {
switch state {
case .recording:
sender.setTitle("record", for: .normal)
state = .readyToRecord
do {
try player.reloadFile()
} catch {
print("Error reloading!")
}
let recordedDuration = player != nil ? player.audioFile.duration : 0
if recordedDuration > 0.0 {
recorder.stop()
let randomfilename:String = NSUUID().uuidString + ".m4a"
print("Filename: \(randomfilename)")
player.audioFile.exportAsynchronously(name: randomfilename, baseDir: .documents, exportFormat: .m4a, callback: {file, exportError in
if let error = exportError {
print("Export failed \(error)")
} else {
print("Export succeeded")
self.loadedFile = file
}
})
}
case .readyToRecord:
do {
try recorder.record()
sender.setTitle("stop", for: .normal)
state = .recording
} catch { print("Error recording!") }
default:
print("no")
}
}
#IBAction func play(_ sender: UIButton) {
playLoadedFile()
}
#IBAction func valueChanged(_ sender: UISlider) {
timePitch.pitch = Double(sender.value)
}
func playLoadedFile() {
do {
try player.replace(file: loadedFile)
player.start()
} catch { print("Error playing!") }
}
func exportedAudioFile(filename: String) {
print("yay")
}
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
AKAudioFile.cleanTempDirectory()
AKSettings.bufferLength = .medium
AKSettings.defaultToSpeaker = true
//inputPlot.node = mic
micMixer = AKMixer(mic)
mainMixer = AKMixer(player,timePitch)
pitchShifter = AKPitchShifter(player)
timePitch = AKTimePitch(player)
recorder = try? AKNodeRecorder(node: micMixer)
if let file = recorder.audioFile {
player = try? AKAudioPlayer(file: file)
}
AudioKit.output = timePitch // works with player
AudioKit.start()
print("mainMixer status: \(mainMixer.isStarted)")
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
It looks like mainMixer isn't connected to anything. Try changing AudioKit.output = timePitch to AudioKit.output = mainMixer.
As for best practices, get rid of any try?s. Use a do try catch and at least print the error.
if let file = recorder.audioFile {
do{
player = try AKAudioPlayer(file: file)
} catch {
print(error)
}
}
You’re attaching the player to the mixer before you create it. At the time where you give player to AKMixer(), it is nil. Move the mixer creation after the player assignment.
I am trying to get data from multiple apis and saving it to my coredata database. Earlier it comes once in ten times. but now i am getting it every time.
I have created a DispatchGroup and trying to hit api one by one. Below is my code.
let group = DispatchGroup()
group.enter()
SharedFunctions.getCourseSessions {
print("Course Session Done")
group.leave()
}
group.enter()
SharedFunctions.getCourseContent {
print("Course Content Done")
group.leave()
}
group.enter()
SharedFunctions.getCourseQuiz {
print("Course Quiz Done")
group.leave()
}
group.notify(queue: DispatchQueue.global(qos: .background)) {
print("All async calls were run!")
DispatchQueue.main.async {
ACProgressHUD.shared.hideHUD()
completrion()
}
}
Below is my fetching and saving data from api
class func getCourseSessions(completion: #escaping () -> ()) {
let param = "module=getCourseSessions&userid=\(User.uId)&Akey=\(User.akey)&schedule_course_id=\(User.scheduleCourseId)"
SharedFunctions.callWebServices(url: URLS.Base_URL, methodName: "POST", parameters: param, istoken: false, tokenval: "", completion: { (jsonDict) in
print(jsonDict)
DispatchQueue.main.async {
if ((jsonDict.value(forKey: "message") as! NSDictionary).value(forKey: "success") as! String) == "true" {
SharedGlobalVariables.arrayCourseSessions = (((jsonDict.value(forKey: "message") as AnyObject).value(forKey: "data") as AnyObject).value(forKey: "result")) as! NSMutableArray
print(SharedGlobalVariables.arrayCourseSessions.count)
// DispatchQueue.main.async {
SharedGlobalVariables.LoginBool = true
// get a reference to the app delegate
if #available(iOS 10.0, *) {
let appDelegate = UIApplication.shared.delegate as! AppDelegate
print(SharedGlobalVariables.arrayCourseSessions.count)
for j in 0...SharedGlobalVariables.arrayCourseSessions.count - 1 {
let managedContext = appDelegate.persistentContainer.viewContext
let entity = NSEntityDescription.entity(forEntityName: "Course_Sessions", in: managedContext)
let courseSessionsScreen = Course_Sessions(entity: entity!, insertInto: managedContext)
if let arrData = SharedGlobalVariables.arrayCourseSessions[j] as? NSDictionary {
if let courseId = arrData.value(forKey: "course_id") as? Int16 {
courseSessionsScreen.course_id = courseId
}
if let userId = arrData.value(forKey: "user_id") as? Int16 {
courseSessionsScreen.user_id = userId
}
if let enableNextScreenSequence = arrData.value(forKey: "enable_nextscreen_sequence") as? Int16 {
courseSessionsScreen.enable_nextscreen_sequence = enableNextScreenSequence
}
}
do {
try managedContext.save()
// getCourseSessionProperties()
} catch let error as NSError {
print(error)
}
}
} else {
// Fallback on earlier versions
}
//}
}
completion()
}
})
}
There is no perticular place to crash app crash. it crash any where like above methode i am passing all apis.
Getting This error:
Error Domain=NSCocoaErrorDomain Code=132001 "(null)" UserInfo={message=attempt to recursively call -save: on the context aborted, stack trace=(
0 CoreData 0x0000000111ff3892 -[NSManagedObjectContext save:] + 306
1 Tuneem 0x000000010f64046c _TFFFZFC6Tuneem15SharedFunctions26getCourseSessionPropertiesFT10completionFT_T__T_U_FCSo12NSDictionaryT_U_FT_T_U_FT_T_ + 60
2 Tuneem 0x000000010f629197 _TTRXFo___XFdCb___ + 39
3 CoreData 0x000000011200cb52 developerSubmittedBlockToNSManagedObjectContextPerform + 178
4 libdispatch.dylib 0x000000011bf0205c _dispatch_client_callout + 8
5 libdispatch.dylib 0x000000011bee094f _dispatch_queue_serial_drain + 221
6 libdispatch.dylib 0x000000011bee1669 _dispatch_queue_invoke + 1084
7 libdispatch.dylib 0x000000011bee1b32 _dispatch_queue_override_invoke + 654
8 libdispatch.dylib 0x000000011bee3ec4 _dispatch_root_queue_drain + 634
9 libdispatch.dylib 0x000000011bee3bef _dispatch_worker_thread3 + 123
10 libsystem_pthread.dylib 0x000000011c299712 _pthread_wqthread + 1299
11 libsystem_pthread.dylib 0x000000011c2991ed start_wqthread + 13
)}
Error Domain=NSCocoaErrorDomain Code=132001 "(null)" UserInfo=. {message=attempt to recursively call -save: on the context aborted, stack trace=(
0 CoreData 0x0000000111ff3892 -[NSManagedObjectContext save:] + 306
1 Tuneem 0x000000010f64046c _TFFFZFC6Tuneem15SharedFunctions26getCourseSessionPropertiesFT10completionFT_T__T_U_FCSo12NSDictionaryT_U_FT_T_U_FT_T_ + 60
2 Tuneem 0x000000010f629197 _TTRXFo___XFdCb___ + 39
3 CoreData 0x000000011200cb52 developerSubmittedBlockToNSManagedObjectContextPerform + 178
4 libdispatch.dylib 0x000000011bf0205c _dispatch_client_callout + 8
5 libdispatch.dylib 0x000000011bee094f _dispatch_queue_serial_drain + 221
6 libdispatch.dylib 0x000000011bee1669 _dispatch_queue_invoke + 1084
7 libdispatch.dylib 0x000000011bee1b32 _dispatch_queue_override_invoke + 654
8 libdispatch.dylib 0x000000011bee3ec4 _dispatch_root_queue_drain + 634
9 libdispatch.dylib 0x000000011bee3bef _dispatch_worker_thread3 + 123
10 libsystem_pthread.dylib 0x000000011c299712 _pthread_wqthread + 1299
11 libsystem_pthread.dylib 0x000000011c2991ed start_wqthread + 13
)}
Trying to solve it from last couple of days getting no idea, any help will be appreciate.