MagicalRecord MR_importFromObject 未保存答案

【问题标题】：MagicalRecord MR_importFromObject not savedMagicalRecord MR_importFromObject 未保存
【发布时间】：2014-09-29 09:09:55
【问题描述】：

我在使用 MR 导入 json 时遇到问题。

我已将名称的mappedKeyName 设置为名称，按顺序排列

这是我的json

[{"order":0,"name":"out and about"},
{"order":1,"name":"entertainment"},
{"order":2,"name":"get creative"},
{"order":3,"name":"chill"},
{"order":4,"name":"get active"},
{"order":5,"name":"get connected"},
{"order":6,"name":"fresh start"},
{"order":7,"name":"totally random"},
{"order":8,"name":"my favs"}]


-(void)importCategoryData
{
    NSError* err = nil;
    NSString* dataPath = [[NSBundle mainBundle] pathForResource:@"category" ofType:@"json"];
    NSArray *preFillDataDict = [NSJSONSerialization JSONObjectWithData:[NSData dataWithContentsOfFile:dataPath]
                                                options:kNilOptions
                                                  error:&err];
    NSLog(@"preFillDataArray testArray: %@", preFillDataDict);

    [MagicalRecord saveWithBlock:^(NSManagedObjectContext *localContext)
    {
        for (NSDictionary *catObj in preFillDataDict)
        {
            Planningcategory *planCat = [Planningcategory MR_importFromObject:catObj inContext:localContext];
            NSLog(@"asa");
        }
    }
    completion:^(BOOL success, NSError *error) {
        NSLog(@"Success %d error %@",success,error);
    }];
}

给定日志：

NO CHANGES IN ** saveWithBlock:completion: ** CONTEXT - NOT SAVING
Success 0 error (null)

非常感谢任何cmets或积分。

干杯

【问题讨论】：

标签： ios objective-c json import magicalrecord

【解决方案1】：

您是否尝试过改用MR_importFromArray？

[MagicalRecord saveWithBlock: ^(NSManagedObjectContext *localContext) {
    [Planningcategory MR_importFromArray:preFillDataDict];
} completion: ^(BOOL success, NSError *error) {
    // Handle success/error
}];

【讨论】：

【解决方案2】：

你必须保存上下文。

if (![localContext save:&error]) {
    // ...
}

【讨论】：