只有在使用iOS 10.2的5,5s和SE型号上才会发生非常奇怪的崩溃。 Firebase表示100％的崩溃发生在后台。
我能够准确地重现崩溃的堆栈（但不是模拟器上的崩溃本身），并且只知道当用户退出应用程序时它会发生。似乎没有其他的viewDidDisappear代码在真正崩溃时调用，因为在这种情况下堆栈会发生变化。
实际上，崩溃报告中提到的那条直线是在 super.viewDidDisappear（动画），它是空白的......
override func viewDidDisappear(_ animated: Bool) {
super.viewDidDisappear(animated)
self.keyboardAvoiding.endAvoiding()
}
KeyboardAvoiding
func endAvoiding()
{
self.avoiding = false
// Update view frame
updateConstraint(nil)
}
private func updateConstraint(_ keyboardFrame: CGRect?, animationDuration: TimeInterval? = 0.0)
{
// Disable animation
let state = UIView.areAnimationsEnabled
UIView.setAnimationsEnabled(false)
// Force to recalculate view frame if needed (without animation)
self.view.superview?.layoutIfNeeded()
// Restore previous animation state
UIView.setAnimationsEnabled(state)
if let keyboardFrame = keyboardFrame
{
// Decrease view frame
self.constraint.constant = keyboardFrame.height
}
else {
// Reset bottom constraint to initial value
self.constraint.constant = self.initialConstraintConstant
}
// Layout superview
UIView.animate(withDuration: animationDuration ?? 0.0, animations: {
self.view.superview?.layoutIfNeeded()
if let keyboardAvoidingScrollView = self.view.firstViewOfClass(TPKeyboardAvoidingScrollView.self)
{
// Scroll to active text field if scroll view frame changed
keyboardAvoidingScrollView.scrollToActiveTextField()
}
})
}
以下是崩溃报告：
Hardware Model: iPhone6,2
Code Type: ARM-64
Parent Process: ??? [1]
OS Version: iPhone OS 10.2 (14C92)
Exception Type: SIGTRAP
Exception Codes: #0 at 0x100255178
Crashed Thread: 0
Application Specific Information:
Selector name found in current argument registers: release
Thread 0 Crashed:
0 _______ 0x0000000100255178 _______.PhoneNumberController.viewDidDisappear(Swift.Bool) -> () (PhoneNumberController.swift:97)
1 _______ 0x00000001002551a4 @objc _______.PhoneNumberController.viewDidDisappear(Swift.Bool) -> () (PhoneNumberController.swift:0)
2 UIKit 0x000000018e7026f4 -[UIViewController _setViewAppearState:isAnimating:] + 524
3 UIKit 0x000000018e7765b4 -[UIViewController __viewDidDisappear:] + 140
4 UIKit 0x000000018e7c02e0 -[UINavigationController viewDidDisappear:] + 228
5 UIKit 0x000000018e7026f4 -[UIViewController _setViewAppearState:isAnimating:] + 524
6 UIKit 0x000000018e7765b4 -[UIViewController __viewDidDisappear:] + 140
7 CoreFoundation 0x00000001887ceb10 __CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__ + 16
8 CoreFoundation 0x00000001887ce214 _CFXRegistrationPost + 396
9 CoreFoundation 0x00000001887cdf90 ___CFXNotificationPost_block_invoke + 56
10 CoreFoundation 0x000000018883db8c -[_CFXNotificationRegistrar find:object:observer:enumerator:] + 1500
11 CoreFoundation 0x000000018870fe64 _CFXNotificationPost + 372
12 Foundation 0x0000000189244e0c -[NSNotificationCenter postNotificationName:object:userInfo:] + 64
13 UIKit 0x000000018e9785d8 __102-[UIApplication _handleApplicationDeactivationWithScene:shouldForceExit:transitionContext:completion:]_block_invoke.2100 + 288
14 UIKit 0x000000018e97bfdc _runAfterCACommitDeferredBlocks + 288
15 UIKit 0x000000018e96dd50 _cleanUpAfterCAFlushAndRunDeferredBlocks + 556
16 UIKit 0x000000018e6dd0b4 _afterCACommitHandler + 164
17 CoreFoundation 0x00000001887e20c0 __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 28
18 CoreFoundation 0x00000001887dfcf0 __CFRunLoopDoObservers + 368
19 CoreFoundation 0x00000001887e0180 __CFRunLoopRun + 1020
20 CoreFoundation 0x000000018870e2b8 CFRunLoopRunSpecific + 440
21 GraphicsServices 0x000000018a1c2198 GSEventRunModal + 176
22 UIKit 0x000000018e7557fc -[UIApplication _run] + 680
23 UIKit 0x000000018e750534 UIApplicationMain + 204
24 _______ 0x00000001000e3188 main (AppDelegate.swift:25)
25 ??? 0x00000001876f15b8 0x0 + 0