我收到了iOS 6.X用户的许多崩溃报告。他们中的大多数使用iPod4G，iPhone4S，iPhone4或iPhone3GS。没有iOS 7用户发送崩溃报告。
Exception Type: SIGSEGV
Exception Codes: SEGV_ACCERR at 0x8
Crashed Thread: 0
Thread 0 Crashed:
0 libobjc.A.dylib 0x38dca5b0 objc_msgSend + 16
1 Foundation 0x31ae2a8f __35-[NSISLinearExpression description]_block_invoke_0 + 27
2 CoreFoundation 0x31103fdf __CFSimpleMergeSort + 47
3 CoreFoundation 0x3110406b __CFSimpleMergeSort + 187
4 CoreFoundation 0x31075401 CFSortIndexes + 973
5 CoreFoundation 0x310af641 -[NSArray sortedArrayFromRange:options:usingComparator:] + 705
6 CoreFoundation 0x310af313 -[NSArray sortedArrayUsingComparator:] + 59
7 Foundation 0x31ae29a7 -[NSISLinearExpression description] + 147
8 Foundation 0x31ae016f __25-[NSISEngine description]_block_invoke_0 + 123
9 Foundation 0x31ada075 -[NSISEngine enumerateRows:] + 185
10 Foundation 0x31adffdf -[NSISEngine description] + 123
11 CoreFoundation 0x3109a897 -[NSObject(NSObject) _copyDescription] + 35
12 CoreFoundation 0x3110b2db __CFStringAppendFormatCore + 11139
13 CoreFoundation 0x310a5fa9 CFStringCreateWithFormatAndArguments + 73
14 CoreFoundation 0x3112a195 +[NSException raise:format:] + 57
15 Foundation 0x31adc11f -[NSISEngine minimizeConstantInObjectiveRowWithHead:] + 191
16 Foundation 0x31ade759 -[NSISEngine optimize] + 61
17 Foundation 0x31ade8af -[NSISEngine withAutomaticOptimizationDisabled:] + 211
18 UIKit 0x3336bc4f -[UIView(UIConstraintBasedLayout) removeConstraints:] + 283
19 UIKit 0x32f48451 -[UIView(UIConstraintBasedLayout) invalidateIntrinsicContentSize] + 73
20 UIKit 0x331b7439 -[UIButton invalidateIntrinsicContentSize] + 61
21 UIKit 0x32f4863f _UIButtonSetContentForState + 227
22 UIKit 0x32f4870f -[UIButton setImage:forState:] + 23
23 XXXXX-Messenger 0x000103bd -[MessageViewController setEditingMode:] (MessageViewController.m:1057)
24 XXXXX-Messenger 0x0000f973 -[MessageViewController keyboardWasShown:] (MessageViewController.m:882)
25 CoreFoundation 0x3107b037 _CFXNotificationPost + 1427
26 Foundation 0x31991599 -[NSNotificationCenter postNotificationName:object:userInfo:] + 73
27 UIKit 0x32fad879 -[UIInputViewTransition postNotificationsForTransitionStart] + 845
28 UIKit 0x32fad04f -[UIPeripheralHost(UIKitInternal) executeTransition:] + 923
29 UIKit 0x32f389a3 -[UIPeripheralHost(UIKitInternal) setInputViews:animationStyle:] + 907
30 UIKit 0x32f36cbb -[UIResponder becomeFirstResponder] + 475
31 UIKit 0x330d6e99 -[UITextView becomeFirstResponder] + 361
32 UIKit 0x33050c41 -[UITextInteractionAssistant(UITextInteractionAssistant_Internal) setFirstResponderIfNecessary] + 121
33 UIKit 0x33050563 -[UITextInteractionAssistant(UITextInteractionAssistant_Internal) oneFingerTap:] + 1739
34 UIKit 0x3304fd89 _UIGestureRecognizerSendActions + 129
35 UIKit 0x330173f5 -[UIGestureRecognizer _updateGestureWithEvent:] + 393
36 UIKit 0x33204a39 ___UIGestureRecognizerUpdate_block_invoke_0543 + 49
37 UIKit 0x32f3b82f _UIGestureRecognizerRemoveObjectsFromArrayAndApplyBlocks + 219
38 UIKit 0x32f3a293 _UIGestureRecognizerUpdate + 1275
39 UIKit 0x32f451e7 -[UIWindow _sendGesturesForEvent:] + 767
40 UIKit 0x32f44db3 -[UIWindow sendEvent:] + 91
41 UIKit 0x32f32801 -[UIApplication sendEvent:] + 381
42 UIKit 0x32f3211b _UIApplicationHandleEvent + 6155
43 GraphicsServices 0x34c355a3 _PurpleEventCallback + 591
44 GraphicsServices 0x34c351d3 PurpleEventCallback + 35
45 CoreFoundation 0x310ff173 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 35
46 CoreFoundation 0x310ff117 __CFRunLoopDoSource1 + 139
47 CoreFoundation 0x310fdf99 __CFRunLoopRun + 1385
48 CoreFoundation 0x31070ebd CFRunLoopRunSpecific + 357
49 CoreFoundation 0x31070d49 CFRunLoopRunInMode + 105
50 GraphicsServices 0x34c342eb GSEventRunModal + 75
51 UIKit 0x32f86301 UIApplicationMain + 1121
52 XXXXX-Messenger 0x00015fef main (main.m:16)
这是堆栈跟踪第23行的相关代码
1057: [_actionButton setImage:[UIImage imageNamed:@"conversationSmileyButton.png"] forState:UIControlStateNormal];
1058: [_actionButton setImage:[UIImage imageNamed:@"conversationSmileyButton.png"] forState:UIControlStateHighlighted];
该代码适用于我的所有测试，我无法重现，但我在一周内收到了大约2000份崩溃报告。
有什么想法吗？
根据要求
- (void)setEditingMode:(MessageViewEditingMode)editingMode
{
_editingMode = editingMode;
switch (editingMode) {
//
// None
//
case MessageViewEditingModeNone: {
// SmileySelector ausblenden, falls vorhanden
if (_smileySelector != nil && [self.view.subviews indexOfObject:_smileySelector] != NSNotFound) {
[_smileySelector removeFromSuperview];
}
// ActionButton
[_actionButton setImage:[UIImage imageNamed:@"conversationActionButton.png"] forState:UIControlStateNormal];
[_actionButton setImage:[UIImage imageNamed:@"conversationActionButton.png"] forState:UIControlStateHighlighted];
// ComposeView verschieben
_composeViewMarginBottom.constant = 0.0f;
// Keyboard ausblenden
[_composeTextView resignFirstResponder];
} break;
//
// Text
//
case MessageViewEditingModeText: {
// ActionButton
[_actionButton setImage:[UIImage imageNamed:@"conversationSmileyButton.png"] forState:UIControlStateNormal];
[_actionButton setImage:[UIImage imageNamed:@"conversationSmileyButton.png"] forState:UIControlStateHighlighted];
// ComposeView verschieben
_composeViewMarginBottom.constant = -_keyboardHeight;
// Keyboard einblenden
[_composeTextView becomeFirstResponder];
} break;
//
// Smiley
//
case MessageViewEditingModeSmiley: {
// ActionButton
[_actionButton setImage:[UIImage imageNamed:@"conversationKeyboardButton.png"] forState:UIControlStateNormal];
[_actionButton setImage:[UIImage imageNamed:@"conversationKeyboardButton.png"] forState:UIControlStateHighlighted];
// Keyboard ausblenden
[_composeTextView resignFirstResponder];
// Anziegen, falls das noch nicht passiert ist
if ([self.view.subviews indexOfObject:_smileySelector] == NSNotFound) {
[self.view addSubview:_smileySelector];
}
} break;
}
// Layout anwenden
[self.view setNeedsUpdateConstraints];
[UIView animateWithDuration:0.25 animations:^{
[self.view layoutIfNeeded];
}];
}
- (void)keyboardWasShown:(NSNotification*)aNotification
{
if (_keyboardAnimationDuration == 0 || _keyboardHeight == 0) {
NSDictionary* info = [aNotification userInfo];
CGSize kbSize = [[info objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue].size;
_keyboardAnimationDuration = [[info objectForKey:UIKeyboardAnimationDurationUserInfoKey] doubleValue];
_keyboardHeight = kbSize.height;
}
self.editingMode = MessageViewEditingModeText;
}
其他信息
我在这里做的是用另一个图像替换现有的UIButton图像（conversationSmileyButton.png）。正如在引发异常之前可以看到的那样（堆栈跟踪线14）存在一些约束操作。也许iOS 6无法正确处理这些限制。 Imo应该有适用于iOS 6的解决方法。