iphone - 将 coredata 文件存储在文档目录之外？

Question

我允许在我的应用程序中共享itunes，但我注意到coredata在文档目录中创建sqlite

我可以将此文件的保存更改为库吗，如果可以，如何更改

最诚挚的问候

Answer 1

这是可能的。我制作了一个小辅助方法，它创建了一条无法通过 iTunes 访问的路径。数据库将存储在库目录中，该目录包含在itunes备份中。

- (NSString *)applicationPrivateDocumentsDirectory {
    static NSString *path;
    if (!path) {
        NSString *libraryPath = [NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES) lastObject];
        path = [libraryPath stringByAppendingPathComponent:@"Private Documents"];
        BOOL isDirectory;
        if (![[NSFileManager defaultManager] fileExistsAtPath:path isDirectory:&isDirectory]) {
            NSError *error = nil;
            if (![[NSFileManager defaultManager] createDirectoryAtPath:path withIntermediateDirectories:YES attributes:nil error:&error]) {
                NSLog(@"Can't create directory %@ [%@]", path, error);
                abort(); // replace with proper error handling
            }
        }
        else if (!isDirectory) {
            NSLog(@"Path %@ exists but is no directory", path);
            abort(); // replace with error handling
        }
    }
    return path;
} 

然后你会替换

NSURL *storeURL = [[self applicationDocumentsDirectory] URLByAppendingPathComponent:@"SomeApp.sqlite"];

在 - (NSPersistentStoreCoordinator *)persistentStoreCoordinator 方法中:

NSURL *storeURL = [NSURL fileURLWithPath:[[self applicationPrivateDocumentsDirectory] stringByAppendingPathComponent:@"SomeApp.sqlite"]];