“尝试设置非属性列表对象......”带有自定义类的 NSMutableDictionary [重复]

我有一个名为的自定义类ServerModule这是一个子类NSObject。我基本上存储了所有这些ServerModules 中包含一个键值对NSMutableDictionary。然后字典存储在NSUserDefaults。我了解到NSUserDefaults仅在访问对象时返回对象的不可变版本，因此我将字典初始化更改为：

_AllModules = [[NSMutableDictionary alloc]initWithDictionary:[_editServerModules objectForKey:@"AllModules"]]; //initialize a copy of AllModules dictionary

现在，我只是想存储一个自定义ServerModule该字典中的对象，并同步它。以下代码尝试执行此操作：

//Create new ServerModule
        ServerModule* newServer = [[ServerModule alloc]initWithUUID];
        newServer.name = self.tf_name.text;
        newServer.ip = self.tf_ip.text;
        newServer.port = self.tf_port.text;
        newServer.username = self.tf_user.text;
        newServer.password = self.tf_pass.text;
        //Add the ServerModule to AllModules dictionary with the key of its identifier
        [_AllModules setObject:newServer forKey:newServer.identifier];
        [self updateData];
        [_editServerModules synchronize];

标识符是一个字符串，在构造函数中设置ServerModule。这是代码updateData.

[_editServerModules setObject:_AllModules forKey:@"AllModules"];

如果您想知道，该对象位于@"AllModules"在AppDelegate中初始化如下：

NSMutableDictionary* AllModules = [[NSMutableDictionary alloc]init];

再次，这是我尝试保存某些内容时遇到的错误：

Attempt to set a non-property-list object {
    "42E9EEA0-9051-4E2A-81EA-DC8FC5639C26" = "<ServerModule: 0x8ac4e50>";
} as an NSUserDefaults value for key AllModules

谢谢你的帮助！

〜地毯嘶嘶声

您只能存储属性列表类型（数组、数据、字符串、数字、日期、字典）或 urlNSUserDefaults https://developer.apple.com/library/ios/documentation/cocoa/reference/foundation/Classes/NSUserDefaults_Class/Reference/Reference.html。这意味着所有内容（包括任何嵌套字典值）都必须是属性列表类型。你会想要实施NSCoding http://nshipster.com/nscoding/您的协议ServerModule对象，然后使用NSKeyedArchiver https://developer.apple.com/library/ios/documentation/cocoa/reference/foundation/Classes/NSKeyedArchiver_Class/Reference/Reference.html在存储数据之前对其进行序列化并且NSKeyedUnarchiver https://developer.apple.com/library/ios/documentation/cocoa/reference/foundation/Classes/NSKeyedUnarchiver_Class/Reference/Reference.html读回数据后缩小数据NSUserDefaults https://developer.apple.com/library/ios/documentation/cocoa/reference/foundation/Classes/NSUserDefaults_Class/Reference/Reference.html.

例如，假设您显示的属性存在于ServerModule对象，我会添加以下内容NSCoding https://developer.apple.com/library/ios/documentation/cocoa/reference/foundation/Protocols/NSCoding_Protocol/Reference/Reference.html协议方法到你的ServerModule执行：

#pragma mark - NSCoding support
-(void)encodeWithCoder:(NSCoder*)encoder {
    [encoder encodeObject:self.name forKey:@"name"];
    [encoder encodeObject:self.ip forKey:@"ip"];
    [encoder encodeObject:self.port forKey:@"port"];
    [encoder encodeObject:self.username forKey:@"username"];
    [encoder encodeObject:self.password forKey:@"password"];
}

-(id)initWithCoder:(NSCoder*)decoder {
    self.name = [decoder decodeObjectForKey:@"name"];
    self.ip = [decoder decodeObjectForKey:@"ip"];
    self.port = [decoder decodeObjectForKey:@"port"];
    self.username = [decoder decodeObjectForKey:@"username"];
    self.password = [decoder decodeObjectForKey:@"password"];
    return self;
}

当然，你需要序列化：

NSData* archivedServerModules = [NSKeyedArchiver archivedDataWithRootObject:_AllModules];
[_editServerModules setObject:archivedServerModules forKey:@"AllModules"];

并适当放气：

NSData* archivedServerModules = [_editServerModules objectForKey:@"AllModules"];
NSDictionary* serverModules = [NSKeyedUnarchiver unarchiveObjectWithData:archivedServerModules];

希望这能让您了解我在说什么。