我正在使用 KVC 序列化一个NSObject
并尝试将其保存到NSUserDefaults
,Attempt to insert non-property value
当我尝试存储我的NSDictionary
.
以下是相关对象的属性MyClass
:
@interface MyClass : NSObject
@property (copy,nonatomic) NSNumber* value1;
@property (copy,nonatomic) NSNumber* value2;
@property (copy,nonatomic) NSString* value3;
@property (copy,nonatomic) NSString* value4;
@property (copy,nonatomic) NSString* value5;
@property (copy,nonatomic) NSString* value6;
@property (copy,nonatomic) NSString* value7;
@property (copy,nonatomic) NSString* value8;
@end
当需要保存 MyClass 时,它会出现在此处:
-(void)saveMyClass
{
NSArray* keys = [NSArray arrayWithObjects:
@"value1",
@"value2",
@"value3",
@"value4",
@"value5",
@"value6",
@"value7",
@"value8",
nil];
NSDictionary* dict = [self dictionaryWithValuesForKeys:keys];
for( id key in [dict allKeys] )
{
NSLog(@"%@ %@",[key class],[[dict objectForKey:key] class]);
}
NSUserDefaults* defaults = [NSUserDefaults standardUserDefaults];
[defaults setObject:dict forKey:[NSString stringWithString:kMyClassKey]];
[defaults synchronize];
}
产生这个输出:
2012-02-23 19:35:27.518 MyApp[10230:40b] __NSCFConstantString __NSCFNumber
2012-02-23 19:35:27.519 MyApp[10230:40b] __NSCFConstantString __NSCFNumber
2012-02-23 19:35:27.519 MyApp[10230:40b] __NSCFConstantString __NSCFString
2012-02-23 19:35:27.519 MyApp[10230:40b] __NSCFConstantString __NSCFString
2012-02-23 19:35:27.520 MyApp[10230:40b] __NSCFConstantString __NSCFString
2012-02-23 19:35:27.520 MyApp[10230:40b] __NSCFConstantString __NSCFString
2012-02-23 19:35:27.520 MyApp[10230:40b] __NSCFConstantString __NSCFString
2012-02-23 19:35:27.520 MyApp[10230:40b] __NSCFConstantString NSNull
2012-02-23 18:38:48.489 MyApp[9709:40b] *** -[NSUserDefaults setObject:forKey:]: Attempt to insert non-property value '{
value1 = "http://www.google.com";
value2 = "MyClassData";
value3 = 8;
value4 = "<null>";
value5 = "http://www.google.com";
value6 = 1;
value7 = "http://www.google.com";
value8 = 4SY8KcTSGeKuKs7s;
}' of class '__NSCFDictionary'. Note that dictionaries and arrays in property lists must also contain only property values.`
如您所见, 中的所有对象dict
都是属性列表值,其所有键都是NSString*
. 为了执行此操作,我缺少什么琐事?还是我应该放弃并使用writeToFile
或类似的?