我到处搜索但我无法在任何地方找到此参数（serviceProcessAssertion）。我该如何解决这个错误？为什么会这样？这是我的崩溃日志。
"2016-05-08 03:33:46","com.xxx.xxxx","2.0.9","date = 2016-05-08 03:33:39 +0000;
buildVersion = 2.0.9;
model = iPad;
systemName = iPhone OS;
systemVersion = 9.3.1;
timeSpent = 469.28;
uid = 3D887DDF-8D43-4D17-8C1B-CDE33552E779;
reason = info.serviceProcessAssertion is nil;
stackTrace =
(
0 CoreFoundation 0x247d5ba3 ____exceptionPreprocess (in CoreFoundation) + 150
1 libobjc.A.dylib 0x23f92dff objc_exception_throw + 38
2 CoreFoundation 0x247d5ad1 -[NSException initWithCoder:] (in CoreFoundation) + 0
3 UIKit 0x2956a0df -[_UIViewServiceInterface _initWithConnectionInfo:serviceBundleIdentifier:service:deputyInterfaces:] (in UIKit) + 190
4 UIKit 0x2956a56b -[_UIViewServiceInterface _initWithConnectionInfo:service:deputyInterfaces:] (in UIKit) + 46
5 UIKit 0x29569f93 __83+[_UIViewServiceInterface connectToViewService:deputyInterfaces:connectionHandler:]_block_invoke (in UIKit) + 78
6 UIKit 0x2956860b __112+[_UIViewServiceInterfaceConnectionRequest _connectToViewServiceWithBundleIdentifier:service:connectionHandler:]_block_invoke (in UIKit) + 50
7 libdispatch.dylib 0x24367cbf _dispatch_call_block_and_release (in libdispatch.dylib) + 10
8 libdispatch.dylib 0x24371e7f _dispatch_queue_drain (in libdispatch.dylib) + 1762
9 libdispatch.dylib 0x2436ae17 _dispatch_queue_invoke (in libdispatch.dylib) + 282
10 libdispatch.dylib 0x243736a1 _dispatch_root_queue_drain (in libdispatch.dylib) + 1572
11 libdispatch.dylib 0x2437307b _dispatch_worker_thread3 (in libdispatch.dylib) + 94
12 libsystem_pthread.dylib 0x24506e0d _pthread_wqthread + 1024
13 libsystem_pthread.dylib 0x245069fc start_wqthread + 8
);",