里面含有null时崩溃

[kedu]

bugly上上报的，如下
Trapped uncaught exception 'NSInvalidArgumentException', reason: 'Invalid type in JSON write ((null))' ( 0 CoreFoundation 0x00000001a1be00cc AE3C9338-0166-397A-9643-356B14F6EE58 + 1155276, 1 libobjc.A.dylib 0x000000019f079abc objc_exception_throw + 88, 2 Foundation 0x00000001a07db2c4 C031896B-2EF1-3D89-966A-0B52D54BCEEE + 639684, 3 Foundation 0x00000001a08373d4 C031896B-2EF1-3D89-966A-0B52D54BCEEE + 1016788, 4 CoreFoundation 0x00000001a1ae413c AE3C9338-0166-397A-9643-356B14F6EE58 + 123196, 5 CoreFoundation 0x00000001a1ae39d0 AE3C9338-0166-397A-9643-356B14F6EE58 + 121296, 6 Foundation 0x00000001a08371f0 C031896B-2EF1-3D89-966A-0B52D54BCEEE + 1016304, 7 Foundation 0x00000001a07f78e8 C031896B-2EF1-3D89-966A-0B52D54BCEEE + 755944, 8 Foundation 0x00000001a07a1200 C031896B-2EF1-3D89-966A-0B52D54BCEEE + 401920, 9 MJExtension 0x00000001095304d0 -[NSObject(MJKeyValue) mj_JSONData] + 164, 10 MJExtension 0x0000000109530664 -[NSObject(MJKeyValue) mj_JSONString] + 136。
我看AI给出的解决办法是加上判断[NSJSONSerialization isValidJSONObject:cleanObject]。我想问下为什么框架没有这个判断，基于什么理由？我加上这个是不是就可以解决这个问题