Question

我是核心数据的新手，我使用this来执行某些步骤，但是从iOS 10开始，默认情况下会创建方法，

- (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Action Extension的任何想法/链接/建议？救命。。。

Answer 1

你可以做同样的事情。在initWithName之后和loadPersistentStoresWithCompletionHandler创建NSPersistentStoreDescription对象之前，设置其网址，然后将_persistentContainer的{{1}}属性设置为它。

Answer 2

也许这会有所帮助：

NSPersistentContainer uses a new class NSPersistentStoreDescription to describe the configuration information to pass to NSPersistentStoreCoordinator when adding a persistent store. NSPersistentStoreDescription defaults to an NSSQLiteStoreType with automatic light weight migration enabled.

所以，在iOS10中，你只需要

选择xcdatamodeld文件
编辑器＆gt;添加模型版本......
切换到新版本。修改你想要的东西

完成〜

如何在iOS 10中将coredata迁移到Action扩展中

2 个答案: