CODEWITHSUNDEEP
iosobjective-ciphoneuiwebview
tzl
tzl

Reputation: 1590

UIWebSelectSinglePicker crash

We receive some reports for crashes in UIWebSelectSinglePicker. We guess it's due to an empty datasource array. This occurs in a webview though. How can we work around this? would prefer a native only solution

edit

happens only on iphones, running both iOS7 and iOS8

1   CoreFoundation  __exceptionPreprocess + 127
2   libobjc.A.dylib objc_exception_throw + 36
3   CoreFoundation  -[__NSArrayM objectAtIndex:] + 228
4   UIKit   -[UIWebSelectSinglePicker pickerView:didSelectRow:inComponent:] + 56
5   UIKit   -[UIPickerView _sendSelectionChangedForComponent:notify:] + 90
6   UIKit   -[UIPickerTableView _scrollingFinished] + 152
7   UIKit   -[UIScrollView(UIScrollViewInternal) _stopScrollDecelerationNotify:] + 842
8   UIKit   -[UIScrollView(UIScrollViewInternal) _stopScrollingNotify:pin:tramplingDragFlags:] + 502
9   UIKit   -[UIScrollView(UIScrollViewInternal) _stopScrollingNotify:pin:] + 28
10  UIKit   -[UIScrollView _smoothScrollWithUpdateTime:] + 208
11  QuartzCore  CA::Display::DisplayLinkItem::dispatch() + 96
12  QuartzCore  CA::Display::DisplayLink::dispatch_items(unsigned long long, unsigned long long, unsigned long long) + 364
13  IOMobileFramebuffer IOMobileFramebufferVsyncNotifyFunc + 88
14  IOKit   IODispatchCalloutFromCFMessage + 254
15  CoreFoundation  __CFMachPortPerform + 130
16  CoreFoundation  __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 32
17  CoreFoundation  __CFRunLoopDoSource1 + 344
18  CoreFoundation  __CFRunLoopRun + 1606
19  CoreFoundation  CFRunLoopRunSpecific + 474
20  CoreFoundation  CFRunLoopRunInMode + 104
21  GraphicsServices    GSEventRunModal + 134
22  UIKit   UIApplicationMain + 1438
23  MYAPP   main (main.m:16)
24  libdyld.dylib   start + 0

Upvotes: 13

Views: 1393

Answers (2)

dogsgod
dogsgod

Reputation: 6387

I would guess this is related to another issue here on SO

There is an issue with the WebView and system controls triggered from HTML.

Upvotes: 2

Y.Bonafons
Y.Bonafons

Reputation: 2349

I think there is no link with UIWebSelectSinglePicker. I think you are trying to access to an object at an index outside the range of your array.

To prevent this you can add something like:

if(index < [self.myArray count] && [self.myArray count] > 0){
     id myobject = [self.myArray objectAtIndex:index];
     // do what you want here with your object
}

To debug this kind of issue and find where it happens, try to add a symbolic breakpoint:

  1. Select the breakpoint navigator
  2. click on "+"
  3. "add symbolic breakpoint"
  4. add "objectAtIndex" in the symbol field

Upvotes: 0

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