如何在 iOS 10 中将 coredata 迁移到 Action 扩展中答案

【问题标题】：How to migrate coredata into Action extension in iOS 10如何在 iOS 10 中将 coredata 迁移到 Action 扩展中
【发布时间】：2017-03-30 07:23:08
【问题描述】：

我是核心数据的新手，我使用this 执行某些步骤，但从 iOS 10 开始，默认创建以下方法，

- (NSPersistentContainer *)persistentContainer {
// The persistent container for the application. This implementation creates and returns a container, having loaded the store for the application to it.
@synchronized (self) {
    if (_persistentContainer == nil) {
        _persistentContainer = [[NSPersistentContainer alloc] initWithName:@"namanCoreData"];
        [_persistentContainer loadPersistentStoresWithCompletionHandler:^(NSPersistentStoreDescription *storeDescription, NSError *error) {
            if (error != nil) {
                // Replace this implementation with code to handle the error appropriately.
                // abort() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.

                /*
                 Typical reasons for an error here include:
                 * The parent directory does not exist, cannot be created, or disallows writing.
                 * The persistent store is not accessible, due to permissions or data protection when the device is locked.
                 * The device is out of space.
                 * The store could not be migrated to the current model version.
                 Check the error message to determine what the actual problem was.
                */
                NSLog(@"Unresolved error %@, %@", error, error.userInfo);
                abort();
            }
        }];
    }
}

return _persistentContainer;}

关于如何将核心数据用于操作扩展的任何想法/链接/建议？帮助。 . .

【问题讨论】：

在您的扩展程序中尝试使用此代码时遇到什么问题？

标签： objective-c core-data safari-extension core-data-migration

【解决方案1】：

你可以做同样的事情。在initWithName 之后和loadPersistentStoresWithCompletionHandler 之前创建一个NSPersistentStoreDescription 对象，设置其URL，然后将_persistentContainer 的persistentStoreDescriptions 属性设置为它。

【讨论】：