ALAsset有可能为nil的问题

[xl19880619]

2015-07-10 19:21:00.204 JFImagePickerController[3497:1256692] * Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '* setObjectForKey: key cannot be nil'
*** First throw call stack:
(0x184f642d8 0x196c380e4 0x184e4d428 0x1000c7aac 0x100128fd4 0x100128f94 0x100136b54 0x100138248 0x19749522c 0x197494ef0)
2015-07-10 19:21:00.204 JFImagePickerController[3497:1253900] * Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '* setObjectForKey: key cannot be nil'
*** First throw call stack:
(0x184f642d8 0x196c380e4 0x184e4d428 0x1000c7aac 0x100128fd4 0x100128f94 0x100136b54 0x100138248 0x19749522c 0x197494ef0)
2015-07-10 19:21:00.205 JFImagePickerController[3497:1256832] * Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '* setObjectForKey: key cannot be nil'
*** First throw call stack:
(0x184f642d8 0x196c380e4 0x184e4d428 0x1000c7aac 0x100128fd4 0x100128f94 0x100136b54 0x100138248 0x19749522c 0x197494ef0)
libc++abi.dylib: libc++abi.dylib: libc++abi.dylib: terminating with uncaught exception of type NSExceptionterminating with uncaught exception of type NSException

terminating with uncaught exception of type NSException

上面为异常输出
底下为asset输出
(lldb) po [[asset defaultRepresentation] filename]
nil
(lldb) po asset
ALAsset - Type:Photo, URLs:assets-library://asset/asset.JPG?id=7615D9DA-C31A-4351-A711-2A868264F8D5&ext=JPG
图片可能进行icloud存储优化过