NSManagedObject子类和setValuesForKeysWithDictionary:

NSManagedObject 子类使用:

- (void)setValuesForKeysWithDictionary:(NSDictionary *)keyedValues

我还故意给它未定义的键,当然 应该

因此,我实施了:

- (void)setValue:(id)value forUndefinedKey:(NSString *)key

然而,我的实现从未被调用 被管理对象 仍然 抛出异常。

setValuesForKeysWithDictionary: 被管理对象 的子类实现 setValue:forUndefinedKey:

按要求添加代码,但由于我只是实现了一个现有的方法,没有被调用,我不知道这会有多大帮助:

- (Company*)companyWithDictionary:(NSDictionary*)values{

    Company* newCompany = (Company*)[NSEntityDescription insertNewObjectForEntityForName:@"Company" inManagedObjectContext:self];

    [newCompany setValuesForKeysWithDictionary:values];

    return newCompany;
}

在 Company

- (void)setValue:(id)value forUndefinedKey:(NSString *)key{

    if([key isEqualToString:idKey]){

        [self setValue:value forKey:@"uniqueID"];

    }else if([key isEqualToString:descriptionKey]){

        [self setValue:value forKey:@"descriptionText"];

    }else if([key isEqualToString:timeUpdatedKey]){

        [self setValue:value forKey:@"dateUpdated"];

    }else{

        [super setValue:value forUndefinedKey:key];

    } 
}