** Attempt to set a non-property-list object{type = immutable dict, count = 4,****entries =>**** 0 : head_pic =**** 3 : nickname ={contents = "****張三****"}**** 5 : department ={contents = "****售票部****"}**** 6 : job ={contents = "****系統(tǒng)管理員****"}**

**}**

** as an NSUserDefaults/CFPreferences value for key user**

1、原因：插入了不識別的數(shù)據(jù)類型，NSUserDefaults支持的數(shù)據(jù)類型有NSString、 NSNumber、NSDate、 NSArray、NSDictionary、BOOL、NSInteger、NSFloat等系統(tǒng)定義的數(shù)據(jù)類型。自定義的類型需要轉(zhuǎn)成NSData再存入。

2、原因：

"user": {

"nickname": "張三",

"job": "系統(tǒng)管理員",

"department": "售票部",

"head_pic": null

}

數(shù)據(jù)結(jié)構(gòu)有"null"，而NSUserDefaults是不能被成功解析并存入的，所有在存入之前需要將里邊的"null"改成 "" 即可。