了解Crashlytics故障报告（部分适用） [英] Understanding Crashlytics Crash Report (partial apply)
本文介绍了了解Crashlytics故障报告（部分适用）的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
难以理解Crashlytics中的崩溃报告。我在分析崩溃报告方面经验不足。感谢您的帮助。
Having trouble understanding a crash report in Crashlytics. I do not have much experience in analyzing crash report. Appreciate your help.
这是崩溃日志：
Crashed: com.apple.main-thread
0 My App 0x100f77180 specialized closure #1 in closure #1 in ConfirmItemCheckInViewController.doneButtonPressed() (ConfirmItemCheckInViewController.swift:175)
1 My App 0x100f77c94 partial apply for closure #1 in closure #1 in ConfirmItemCheckInViewController.doneButtonPressed() (ConfirmItemCheckInViewController.swift)
2 My App 0x100f95650 thunk for @callee_owned (@owned UIAlertAction) -> () (SettingsViewController.swift)
3 UIKit 0x18e4f5cf4 -[UIAlertController _invokeHandlersForAction:] + 108
4 UIKit 0x18e4f66ec __103-[UIAlertController _dismissAnimated:triggeringAction:triggeredByPopoverDimmingView:dismissCompletion:]_block_invoke.459 + 28
5 UIKit 0x18e33b030 -[UIPresentationController transitionDidFinish:] + 1320
6 UIKit 0x18e33ea20 __56-[UIPresentationController runTransitionForCurrentState]_block_invoke_2 + 188
7 UIKit 0x18e10a9d8 -[_UIViewControllerTransitionContext completeTransition:] + 116
8 UIKit 0x18e02fd7c -[UIViewAnimationBlockDelegate _didEndBlockAnimation:finished:context:] + 764
9 UIKit 0x18e02f70c -[UIViewAnimationState sendDelegateAnimationDidStop:finished:] + 312
10 UIKit 0x18e02f418 -[UIViewAnimationState animationDidStop:finished:] + 296
11 UIKit 0x18e02f4b8 -[UIViewAnimationState animationDidStop:finished:] + 456
12 QuartzCore 0x188bd3d6c CA::Layer::run_animation_callbacks(void*) + 284
13 libdispatch.dylib 0x18456d048 _dispatch_client_callout + 16
14 libdispatch.dylib 0x184579b74 _dispatch_main_queue_callback_4CF$VARIANT$mp + 1016
15 CoreFoundation 0x184b8ff20 __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 12
16 CoreFoundation 0x184b8dafc __CFRunLoopRun + 2012
17 CoreFoundation 0x184aae2d8 CFRunLoopRunSpecific + 436
18 GraphicsServices 0x18693ff84 GSEventRunModal + 100
19 UIKit 0x18e05b880 UIApplicationMain + 208
20 My App 0x100f4f924 main (AppDelegate.swift:15)
21 libdyld.dylib 0x1845d256c start + 4
更新：添加了doneButtonPressed的代码。
最近我没有对此部分进行任何更改。自发布以来，此场景在1.5年内没有任何崩溃。
Update: Added the code for doneButtonPressed. I do not make any changes to this part recently. This scene do not have any crash for 1.5 years since it is released.
func doneButtonPressed() {
if let signImage = signatureImage {
if let scheduleID = scheduleID {
if let driverID = driverID {
if let customerID = customerID {
let progressHUD = MBProgressHUD.showAdded(to: self.view, animated: true)
progressHUD.label.text = "Checking Item In"
NetworkLoader.sharedLoader.confirmCheckIn(signImage, shipmentID: scheduleID, customerID: customerID, driverID: driverID, items: items, valueAddedItems: self.valueAddedItemsList, completion: { (networkStatus, status) in
progressHUD.hide(animated: true)
if status {
// Remove saved signature
var index = SignatureData.sharedSignatureData.getSignatureIndex(scheduleID)
if index != -1 {
SignatureData.sharedSignatureData.sharedSignatureItems.remove(at: index)
}
// Remove saved item
index = PickupItemData.sharedPickupItemData.getPickupItemIndex(scheduleID)
if index != -1 {
PickupItemData.sharedPickupItemData.sharedPickupItems.remove(at: index)
}
let alert = UIAlertController(title: "Checked In", message: "", preferredStyle: UIAlertControllerStyle.alert)
let alertAction: UIAlertAction = UIAlertAction(title: "OK", style: UIAlertActionStyle.default, handler: { (_) in
let myScheduleNC :UINavigationController = self.storyboard?.instantiateViewController(withIdentifier: "MyScheduleNavController") as! UINavigationController
self.revealViewController().pushFrontViewController(myScheduleNC, animated: true) // LINE 175 IS HERE
})
alert.addAction(alertAction)
self.present(alert, animated: true, completion: nil)
} else {
print(networkStatus.networkLoaderErrorDescription)
let alert = UIAlertController(title: networkStatus.networkLoaderErrorTitle, message: networkStatus.networkLoaderErrorDescription, preferredStyle: UIAlertControllerStyle.alert)
let alertAction: UIAlertAction = UIAlertAction(title: "OK", style: UIAlertActionStyle.default, handler: nil)
alert.addAction(alertAction)
self.present(alert, animated: true, completion: nil)
}
})
}
}
}
}
}
推荐答案
添加 [弱自我] 在闭包的完成块中解决了这个问题。
您偶然发现了一种罕见的情况，当 self 被释放并且在调用完成块之前为零时，使用 self。使应用程序崩溃。
Adding [weak self] in the closure's completion block solves this.
You just stumbled upon a rare situation when self was released and was nil before the completion block was called, making the use of self. crash the application.
这篇关于了解Crashlytics故障报告（部分适用）的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
查看全文
