ios - 是否可以将NSMutableArray保存到iOS中的磁盘上？

Question

是否可以将NSMutableArray保存到iOS中的磁盘上？如果是这样，您将如何处理？

我尝试了以下方法，但均未成功。

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString* path = [documentsDirectory stringByAppendingPathComponent:@"test.plist" ];
[assets writeToFile:path atomically:YES];

我的NSMutableArray包含从ALAssetsLibrary中检索的照片和视频的ALAsset，如下所示:

ALAssetsGroupEnumerationResultsBlock assetsEnumerationBlock = ^(ALAsset *result, NSUInteger index, BOOL *stop) { if (result) { [assets addObject:result]; } };

Answer 1

你可以做下面的事情

NSMutableArray *assets = [[NSMutableArray alloc] init];
    NSMutableDictionary *aDict = [[NSMutableDictionary alloc] init];
    [aDict setValue:@"Rajesh" forKey:@"Name"];
    [aDict setValue:@"India" forKey:@"Country"];
    [assets addObject:aDict];
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory = [paths objectAtIndex:0];
    NSString* path = [documentsDirectory stringByAppendingPathComponent:@"test.plist" ];
    [NSKeyedArchiver archiveRootObject:assets toFile:path];
    NSMutableArray *assetsBack = [NSKeyedUnarchiver unarchiveObjectWithFile:path];
    NSLog(@"%@", assetsBack);