iOS12beta版本App启动crash

[dudwchina]

如下所示，App集成友盟在启动后直接crash.

` *** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<UIStatusBarTimeItemView 0x10590cfe0> valueForUndefinedKey:]: this class is not key value coding-compliant for the key _timeString.'

*** First throw call stack:
(0x1fba5b030 0x1fad144e8 0x1fba5ace0 0x1fc48a408 0x1fc3c182c 0x104f11050 0x104f10a1c 0x104f154b8 0x104f1fbf8 0x1056252d0 0x1056260b4 0x105625310 0x1056252d0 0x105634054 0x105634d3c 0x10563e62c 0x1fb6821ac 0x1fb682068)
libc++abi.dylib: terminating with uncaught exception of type NSException

*** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<UIStatusBarTimeItemView 0x10590cfe0> valueForUndefinedKey:]: this class is not key value coding-compliant for the key _timeString.'`