I have an app build on the iOS8 SDK which I archive and then sign for adhoc distribution.
This has been working for 2 years on all devices with various updates. Now I have an iPhone 6 plus.
The app ran fine the first after a new install but now it keeps crashing with error:
"XPC API Misuse: Given object not of required type"
This happens before it gets into didFinishLaunchingWithOptions
Call stack:
Thread 0 name: XPC API Misuse: Given object not of required type. Dispatch queue: com.apple.main-thread
Thread 0 Crashed:
0 libxpc.dylib 0x0000000197dd99d8 _xpc_api_misuse + 60
1 libxpc.dylib 0x0000000197dd99d4 _xpc_api_misuse + 56
2 libxpc.dylib 0x0000000197dc9ae8 xpc_dictionary_set_value + 88
3 libxpc.dylib 0x0000000197dc5538 xpc_dictionary_set_string + 48
4 CoreFoundation 0x0000000186e4b590 _CFXNotificationRemoveObservers + 912
5 Foundation 0x0000000187d1ff20 -[NSNotificationCenter removeObserver:name:object:] + 252
6 UIKit 0x000000018b8588e4 -[UITableView dealloc] + 96
7 UIKit 0x000000018b6bf510 -[UIView(Hierarchy) removeFromSuperview] + 696
8 UIKit 0x000000018b79cb24 -[UIScrollView removeFromSuperview] + 76
9 UIKit 0x000000018b6c219c -[UIView dealloc] + 444
10 CoreFoundation 0x0000000186e217e4 CFRelease + 520
11 CoreFoundation 0x0000000186e2dda4 -[__NSArrayM dealloc] + 148
12 libobjc.A.dylib 0x0000000197599720 (anonymous namespace)::AutoreleasePoolPage::pop(void*) + 560
13 CoreFoundation 0x0000000186e25400 _CFAutoreleasePoolPop + 24
14 Foundation 0x0000000187d1f180 -[NSAutoreleasePool release] + 144
15 UIKit 0x000000018b72f9ac -[UIApplication _run] + 584
16 UIKit 0x000000018b72a980 UIApplicationMain + 1484
17 HelloWorld 0x000000010000636c main (main.m:16)
18 libdyld.dylib 0x0000000197beea04 start + 0
Can anyone help?
I fixed the crash in my own app but I can't 100% pin point the root cause. I suspect it was memory corruption or over retaining an object.
The key was [UITableView dealloc] I implemented dealloc in my table view to see where problem was occurring. I eventually traced it down to a UITableViewCell instantiated from a .xib file. This particular .xib contained multiple UITableViewCells. After giving each table view it's own .xib the crash disappeared.