NSUserDefaults 没有保存完整的对象

Question

我遇到了一些在使用 NSUserDefaults 时从未遇到过的问题。

我有一个自定义类对象，我用它来解析 API 的响应。该类符合 NSCoding，同时实现了 initWithCoder 和 encodeWithCoder。

在 SiteGroup.h 文件中：

@interface SiteGroup : NSObject <NSCoding>
 @property (nonatomic, assign) int SiteGroupID;
 @property (nonatomic, assign) int StatusID;
 @property (nonatomic, copy) NSString *StatusDesc;
 @property (nonatomic, copy) NSString *SiteGroupName;
 @property (nonatomic, copy) NSString *City;
 @property (nonatomic, copy) NSString *State;
 @property (nonatomic) Country *SiteGroupCountry;
 @property (nonatomic, copy) NSString *LocalConference;
 @property (nonatomic, copy) NSString *Address;
 @property (nonatomic, copy) NSString *ClosestAirport;
 @property (nonatomic, copy) NSString *Coordinates;
 @property (nonatomic, copy) NSString *Latitude;
 @property (nonatomic, copy) NSString *Longitude;
 @property (nonatomic, copy) NSString *Altitude;
 @property (nonatomic, copy) NSString *Accuracy;
 @property (nonatomic, copy) NSArray *SiteGroupEvents;
 @property (nonatomic, copy) NSArray *Sites;

在 SiteGroup.m 文件中：

- (id)initWithCoder:(NSCoder *)decoder {
self = [super init];
if (!self) {
    return nil;
}
self.SiteGroupID = [decoder decodeIntForKey:@"SiteGroupID"];
self.SiteGroupName = [decoder decodeObjectForKey:@"SiteGroupName"];
self.City = [decoder decodeObjectForKey:@"City"];
self.State = [decoder decodeObjectForKey:@"State"];
self.SiteGroupCountry = [decoder decodeObjectForKey:@"SiteGroupCountry"];
self.LocalConference = [decoder decodeObjectForKey:@"LocalConference"];
self.Address = [decoder decodeObjectForKey:@"Address"];
self.ClosestAirport = [decoder decodeObjectForKey:@"ClosestAirport"];
self.Coordinates = [decoder decodeObjectForKey:@"Coordinates"];
self.Latitude = [decoder decodeObjectForKey:@"Latitude"];
self.Longitude = [decoder decodeObjectForKey:@"Longitude"];
self.Altitude = [decoder decodeObjectForKey:@"Altitude"];
self.Accuracy = [decoder decodeObjectForKey:@"Accuracy"];
self.SiteGroupEvents = [decoder decodeObjectForKey:@"SiteGroupEvents"];
self.Sites = [decoder decodeObjectForKey:@"Sites"];
self.StatusID = [decoder decodeIntForKey:@"StatusID"];
self.StatusDesc = [decoder decodeObjectForKey:@"StatusDesc"];
return self;
}

- (void)encodeWithCoder:(NSCoder *)encoder {
[encoder encodeInt:self.SiteGroupID forKey:@"SiteGroupID"];
[encoder encodeObject:self.SiteGroupName forKey:@"SiteGroupName"];
[encoder encodeObject:self.City forKey:@"City"];
[encoder encodeObject:self.State forKey:@"State"];
[encoder encodeObject:self.SiteGroupCountry forKey:@"SiteGroupCountry"];
[encoder encodeObject:self.LocalConference forKey:@"LocalConference"];
[encoder encodeObject:self.Address forKey:@"Address"];
[encoder encodeObject:self.ClosestAirport forKey:@"ClosestAirport"];
[encoder encodeObject:self.Coordinates forKey:@"Coordinates"];
[encoder encodeObject:self.Altitude forKey:@"Altitude"];
[encoder encodeObject:self.Accuracy forKey:@"Accuracy"];
[encoder encodeObject:self.SiteGroupEvents forKey:@"SiteGroupEvents"];
[encoder encodeObject:self.Sites forKey:@"Sites"];
[encoder encodeInt:self.StatusID forKey:@"statusID"];
[encoder encodeObject:self.StatusDesc forKey:@"statusDesc"];
}

一旦我完成解析，它就会被添加到 NSMutableArray 中。然后我检查该数组的大小是否大于 0，如果是，我将其存储到 NSUserDefaults 中。

NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults];
    NSData *data = [NSKeyedArchiver archivedDataWithRootObject:[NSArray arrayWithArray:tempSiteGroupList]];
    [userDefaults setObject:data forKey:@"SiteGroupArray"];
    [userDefaults setObject:[NSKeyedArchiver archivedDataWithRootObject:tempSiteGroup] forKey:@"SiteGroup"];

    [userDefaults synchronize];

该数组确实保存到 NSUserDefaults 中，但奇怪的是，并非我的自定义类的所有属性都保存了，有些会保存，有些则不会。 这是我用来恢复 NSUserDefaults 数组的代码：

NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults];
[userDefaults synchronize];
NSData *data = [userDefaults objectForKey:@"SiteGroupArray"];
NSArray *myArray = [NSKeyedUnarchiver unarchiveObjectWithData:data]; 
return myArray;

StatusID、StatusDesc、Latitude、Longitude 和 SiteGroupID 没有被保存，尽管其他一些属性很好。

感谢您的帮助，我从来没有遇到过这种情况，也许我一直在做错事。

Answer 1

您显示的代码未编码 Latitude 和 Longitude...

Answer 2

StatusID 和 StatusDesc 具有不同的密钥（@"StatusID" 用于解码 @"statusID" 用于编码，同样适用于 StatusDesc）用于解码和编码，同时 CRD 声明您不编码并解码Latitude 和Longitude。