在后台使用iOS应用程序的网络请求

时间：2017-06-22 16:17:41

标签： ios swift xcode background slack

我正在创建一个临时应用程序，该应用程序将在我的工作场所分发，以便密切关注我们的测试设备的设备费用水平。我在应用程序中保持应用程序清醒以使用Web上记录的流行技术检查级别：使用AVAudioPlayer播放空白音频文件：see article。

这个工作正常并且一切都很好，但是应用程序的一个重要部分是它应该使用他们的Web钩子API发布到我们的松弛帐户，当我这样做时，应用程序似乎被看门狗杀死： 

Incident Identifier: 1CC4B288-4A42-4E4D-9430-58F0FBFF112A
CrashReporter Key:   df80e009afab39b6c94933dd8d9206d4d293f81e
Hardware Model:      iPhone8,2
Process:             Battery [19555]
Path:                /private/var/containers/Bundle/Application/07816F5B-6850-481F-9FA7-6C717BF3946B/Battery.app/Battery
Identifier:          com.yellowbrickbear.Battery
Version:             1 (1.0)
Code Type:           ARM-64 (Native)
Role:                Foreground
Parent Process:      launchd [1]
Coalition:           com.yellowbrickbear.Battery [6957]


Date/Time:           2017-06-22 16:46:41.1031 +0100
Launch Time:         2017-06-22 16:43:36.2253 +0100
OS Version:          iPhone OS 10.3.2 (14F89)
Report Version:      104

Exception Type:  EXC_CRASH (SIGKILL)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Exception Note:  EXC_CORPSE_NOTIFY
Termination Reason: Namespace <0xF>, Code 0x8badf00d
Triggered by Thread:  0

Filtered syslog:
None found

Thread 0 name:  Dispatch queue: com.apple.main-thread
Thread 0 Crashed:
0   libsystem_kernel.dylib          0x0000000180623224 mach_msg_trap + 8
1   libsystem_kernel.dylib          0x000000018062309c mach_msg + 72
2   CoreFoundation                  0x00000001815f4e90 __CFRunLoopServiceMachPort + 192
3   CoreFoundation                  0x00000001815f2ae4 __CFRunLoopRun + 1060
4   CoreFoundation                  0x0000000181522da4 CFRunLoopRunSpecific + 424
5   GraphicsServices                0x0000000182f8c074 GSEventRunModal + 100
6   UIKit                           0x00000001877dd058 UIApplicationMain + 208
7   Battery                         0x000000010002e2d4 0x100020000 + 58068
8   libdyld.dylib                   0x000000018053159c start + 4

Thread 1 name:  com.apple.uikit.eventfetch-thread
Thread 1:
0   libsystem_kernel.dylib          0x0000000180623224 mach_msg_trap + 8
1   libsystem_kernel.dylib          0x000000018062309c mach_msg + 72
2   CoreFoundation                  0x00000001815f4e90 __CFRunLoopServiceMachPort + 192
3   CoreFoundation                  0x00000001815f2ae4 __CFRunLoopRun + 1060
4   CoreFoundation                  0x0000000181522da4 CFRunLoopRunSpecific + 424
5   Foundation                      0x000000018203cd74 -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 304
6   Foundation                      0x000000018205db44 -[NSRunLoop(NSRunLoop) runUntilDate:] + 96
7   UIKit                           0x00000001881676a8 -[UIEventFetcher threadMain] + 136
8   Foundation                      0x000000018213a2d8 __NSThread__start__ + 996
9   libsystem_pthread.dylib         0x000000018070968c _pthread_body + 240
10  libsystem_pthread.dylib         0x000000018070959c _pthread_body + 0
11  libsystem_pthread.dylib         0x0000000180706cb4 thread_start + 4

Thread 2 name:  AVAudioSession Notify Thread
Thread 2:
0   libsystem_kernel.dylib          0x0000000180623224 mach_msg_trap + 8
1   libsystem_kernel.dylib          0x000000018062309c mach_msg + 72
2   CoreFoundation                  0x00000001815f4e90 __CFRunLoopServiceMachPort + 192
3   CoreFoundation                  0x00000001815f2ae4 __CFRunLoopRun + 1060
4   CoreFoundation                  0x0000000181522da4 CFRunLoopRunSpecific + 424
5   AVFAudio                        0x000000019b866540 GenericRunLoopThread::Entry(void*) + 164
6   AVFAudio                        0x000000019b88c814 CAPThread::Entry(CAPThread*) + 84
7   libsystem_pthread.dylib         0x000000018070968c _pthread_body + 240
8   libsystem_pthread.dylib         0x000000018070959c _pthread_body + 0
9   libsystem_pthread.dylib         0x0000000180706cb4 thread_start + 4

Thread 3 name:  com.apple.coreaudio.AQClient
Thread 3:
0   libsystem_kernel.dylib          0x0000000180623224 mach_msg_trap + 8
1   libsystem_kernel.dylib          0x000000018062309c mach_msg + 72
2   CoreFoundation                  0x00000001815f4e90 __CFRunLoopServiceMachPort + 192
3   CoreFoundation                  0x00000001815f2ae4 __CFRunLoopRun + 1060
4   CoreFoundation                  0x0000000181522da4 CFRunLoopRunSpecific + 424
5   AudioToolbox                    0x00000001845ad9fc GenericRunLoopThread::Entry(void*) + 164
6   AudioToolbox                    0x00000001847814bc CAPThread::Entry(CAPThread*) + 84
7   libsystem_pthread.dylib         0x000000018070968c _pthread_body + 240
8   libsystem_pthread.dylib         0x000000018070959c _pthread_body + 0
9   libsystem_pthread.dylib         0x0000000180706cb4 thread_start + 4

Thread 4:
0   libsystem_pthread.dylib         0x0000000180706ca8 start_wqthread + 0

Thread 5:
0   libsystem_pthread.dylib         0x0000000180706ca8 start_wqthread + 0

我用来发布松弛的代码如下：

DispatchQueue.global(qos: .default).async { [weak self] in

    guard let urlComponents = URLComponents(string: "https://hooks.slack.com/services/"), let url = urlComponents.url else { return } // URL shortened so you can't spam us via this S.O!

    let urlRequest = NSMutableURLRequest(url: url)

    let data = [
        "text": text,
        "channel": /*channel != nil ? channel! :*/ "@simon",
        "icon_emoji": ":passport_control:",
        "username": "Battery Police"
    ]

    guard let jsonData = try? JSONSerialization.data(withJSONObject: data, options: []) else {
            return
        }

    urlRequest.setValue("application/json", forHTTPHeaderField: "Content-Type")
    urlRequest.httpBody = jsonData
    urlRequest.httpMethod = "POST"

    let dataTask = self?.defaultSession?.dataTask(with: urlRequest as URLRequest)
    dataTask?.resume()
}

其中defaultSession设置了后台会话配置。 我正在尝试解决的问题是，为什么这会导致应用程序崩溃，以及我是否可以采取任何措施阻止看门狗杀死它！

1 个答案:

答案 0 :(得分：0)

似乎要么@ CharlyPico建议使用$('.holder .viewMore').click(function(){ $(this).closest('.holder').find('.lessText').hide(); $(this).closest('.holder').find('.fullText').Show(); }); $('.holder .viewLess').click(function(){ $(this).closest('.holder').find('.lessText').Show(); $(this).closest('.holder').find('.fullText').hide(); }); qos创建我的队列，要么以某种方式调用我.background上的.play()来解决这个问题。已在提交中删除。我相当肯定它是前者，因为在某一时刻禁用API请求会使应用程序永久运行，因此很可能在AVAudioPlayer调用被意外删除之前！

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