IOS:致命异常:NSRangeException

Question

该应用程序在iOS 11更新之前正常工作.在iOS 11推出之后,一些用户得到了以下崩溃但我无法在模拟器iOS 11中重现这一点.基于fabric.io,并非所有iOS 11都经历过这种情况,到目前为止我只收到了来自4个用户的22个崩溃报告.需要一些帮助,谢谢.

Fatal Exception: NSRangeException
*** -[__NSArrayM objectAtIndex:]: index 9223372036854775807 beyond bounds [0 .. 1]

Fatal Exception: NSRangeException
0  CoreFoundation                 0x185b7fd38 __exceptionPreprocess
1  libobjc.A.dylib                0x185094528 objc_exception_throw
2  CoreFoundation                 0x185b18c44 _CFArgv
3  CoreFoundation                 0x185a48cc0 -[__NSArrayM removeObjectAtIndex:]
4  UIKit                          0x18f1e4aa8 -[UIPickerView selectedRowInComponent:]
5  UIKit                          0x18fa4a224 -[_UIDatePickerMode_Date _dateForYearRow:]
6  UIKit                          0x18fa46dd8 -[_UIDatePickerMode dateForRow:inCalendarUnit:]
7  UIKit                          0x18fa47a70 -[_UIDatePickerMode _updateSelectedDateComponentsWithNewValueInComponent:usingSelectionBarValue:]
8  UIKit                          0x18fa47d18 -[_UIDatePickerMode selectedDateComponents]
9  UIKit                          0x18fa3b370 -[_UIDatePickerView _updatedLastSelectedComponentsByValidatingSelectedDateWithLastManipulatedComponent:]
10 UIKit                          0x18fa3a7e8 -[_UIDatePickerView _setDate:animated:forced:]
11 UIKit                          0x18fa3ad24 -[_UIDatePickerView _setMode:]
12 UIKit                          0x18fa3ae40 -[_UIDatePickerView setDatePickerMode:]
13 UIKit                          0x18f4f51d8 -[UIDatePicker initWithCoder:]
14 UIKit                          0x18f6bf588 UINibDecoderDecodeObjectForValue
15 UIKit                          0x18f6bf2c0 -[UINibDecoder decodeObjectForKey:]
16 UIKit                          0x18f51652c -[UIRuntimeConnection initWithCoder:]
17 UIKit                          0x18f516d00 -[UIRuntimeEventConnection initWithCoder:]
18 UIKit                          0x18f6bf588 UINibDecoderDecodeObjectForValue
19 UIKit                          0x18f6bf700 UINibDecoderDecodeObjectForValue
20 UIKit                          0x18f6bf2c0 -[UINibDecoder decodeObjectForKey:]
21 UIKit                          0x18f5158a0 -[UINib instantiateWithOwner:options:]
22 UIKit                          0x18f51d64c -[NSBundle(UINSBundleAdditions) loadNibNamed:owner:options:]
23 xxxxxxxxxxxxxxxxxxxxxxxxxx     0x1030445f0 -[VerifyAccountViewController viewDidLoad] (VerifyAccountViewController.m:47)
24 UIKit                          0x18ef8fbfc -[UIViewController loadViewIfRequired]
25 UIKit                          0x18efa8318 -[UIViewController __viewWillAppear:]
26 UIKit                          0x18f114ee0 -[UINavigationController _startCustomTransition:]
27 UIKit                          0x18f036e04 -[UINavigationController _startDeferredTransitionIfNeeded:]
28 UIKit                          0x18f036a34 -[UINavigationController __viewWillLayoutSubviews]
29 UIKit                          0x18f03695c -[UILayoutContainerView layoutSubviews]
30 UIKit                          0x18ef8d000 -[UIView(CALayerDelegate) layoutSublayersOfLayer:]
31 QuartzCore                     0x189b5d0b4 -[CALayer layoutSublayers]
32 QuartzCore                     0x189b61194 CA::Layer::layout_if_needed(CA::Transaction*)
33 QuartzCore                     0x189acff24 CA::Context::commit_transaction(CA::Transaction*)
34 QuartzCore                     0x189af6340 CA::Transaction::commit()
35 UIKit                          0x18f1f3744 _UIApplicationFlushRunLoopCATransactionIfTooLate
36 UIKit                          0x18f8d2718 __handleEventQueueInternal
37 UIKit                          0x18f8cb574 __handleHIDEventFetcherDrain
38 CoreFoundation                 0x185b28358 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__
39 CoreFoundation                 0x185b282d8 __CFRunLoopDoSource0
40 CoreFoundation                 0x185b27b60 __CFRunLoopDoSources0
41 CoreFoundation                 0x185b25738 __CFRunLoopRun
42 CoreFoundation                 0x185a462d8 CFRunLoopRunSpecific
43 GraphicsServices               0x1878d7f84 GSEventRunModal
44 UIKit                          0x18eff3880 UIApplicationMain
45 xxxxxxxxxxxxxxxxxxxxxxxxxx     0x103090ee4 main (main.m:13)
46 libdyld.dylib                  0x18556a56c start

这部分程序代码

- (void)viewDidLoad {

    [super viewDidLoad];

    storyboard = [UIStoryboard storyboardWithName:@"FirstTimeSetup" bundle:nil];
    dateformatter = [[NSDateFormatter alloc] init];
    [dateformatter setTimeZone:[NSTimeZone systemTimeZone]];

    NSArray *nib = [[NSBundle mainBundle] loadNibNamed:@"DatePickerView" owner:self options:nil]; //here is  (VerifyAccountViewController.m:47)
    self.inputDatePicker = [[DatePickerView alloc]initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, 260)];
    self.inputDatePicker = [nib objectAtIndex:0];
    self.inputDatePicker.datePicker.datePickerMode =UIDatePickerModeDate;
    self.inputDatePicker.delegate = self;

    UIBarButtonItem *item = [[UIBarButtonItem alloc] initWithTitle:@"Skip" style:UIBarButtonItemStylePlain target:self action:@selector(skipAction:)];
    self.navigationItem.rightBarButtonItem = item;
}

Answer 1

我们在应用程序中看到了同样的问题,并且能够通过在设置任何其他日期选择器属性之前将日期选择器的日历类型设置为"Gregorian"来修复,例如

self.inputDatePicker = [[DatePickerView alloc] init...];
self.inputDatePicker.calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSCalendarIdentifierGregorian]
self.inputDatePicker.datePicker.datePickerMode = UIDatePickerModeDate;
self.inputDatePicker.delegate = self;

我们通过将用户的日历更改为佛教徒来在iOS11 iPhone 6S上复制.

出于某种原因,如果我们在设置日期选择器模式后设置日历,应用程序将崩溃...似乎是一个苹果错误,迫使开发人员必须考虑我们设置属性的顺序.

Answer 2

首先 - 为什么你在这里设置属性两次？...

self.inputDatePicker = [[DatePickerView alloc]initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, 260)];
self.inputDatePicker = [nib objectAtIndex:0];

如果你想确保这个属性不为零，只需检查返回的 nib 数组，如果它为空，则执行其他操作。

根据崩溃日志，在您尝试从中获取某些值之前，您的阵列已被清理。所以尝试改变

NSArray *nib = [[NSBundle mainBundle] loadNibNamed:@"DatePickerView" owner:self options:nil]; //here is  (VerifyAccountViewController.m:47)
self.inputDatePicker = [[DatePickerView alloc]initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, 260)];
self.inputDatePicker = [nib objectAtIndex:0];

到

self.inputDatePicker = [[[NSBundle mainBundle] loadNibNamed:@"DatePickerView" owner:self options:nil] firstObject];  
if (self.inputDatePicker == nil) {
    // do something or perhaps better to check you nib
}

关于FirstObject。

你有机会检查nib内容吗？它包含请求的视图还是空的？如果为空，请检查 xib 文件的名称。我个人更喜欢以类似的方式编写 xib 的名称NSStringFromClass([self class])- 因为这需要类和 xib 文件具有相同的名称，但不易出错。