STRANGE：iCloud中受密码保护的zip文件一旦备份便更改了其格式，无法解压缩

Question

我将受密码保护的zip文件作为备份上传到iCloud，然后将其上传，然后下载，解压缩并使用相同的文件，只有当我们在同一设备上进行所有这些出色的工作时，它才能正常工作。

考虑这种情况，1.从一个设备压缩并上传文件。 2.从其他设备下载并解压缩（无法解压缩，因为它无法识别该文件为zip格式）

注意：我已通过启用iTunes文件共享来交叉验证文件是否已成功下载到其他设备中。

但是我无法解压缩文件。

Answer 1

我自己找到了解决方案，希望这可以节省其他人的时间，将受密码保护的zip文件转换为数据并进行上传，下载和解压缩

可以将任何文件上传到任何大小的iCloud容器（是的，您应该在iCloud中拥有足够的空间），以SampleData.zip为例

// 1 This method will upload or sync SampleData.zip file in iCloud container, iCloud actually checks the metadata of your file before it uploads it into your iCloud container (so for first time it will upload the file and from next time it will only upload the changes)

-(void) iCloudSyncing:(id)sender
{
    //Doc dir
    NSString *documentsDirectory = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
    NSString *filePath = [documentsDirectory stringByAppendingPathComponent:@"SampleData.zip"];
    NSURL *u = [[NSURL alloc] initFileURLWithPath:filePath];
    NSData *data = [[NSData alloc] initWithContentsOfURL:u];

    //Get iCloud container URL
    NSURL *ubiq = [[NSFileManager defaultManager]URLForUbiquityContainerIdentifier:nil];// in place of nil you can add your container name
    //Create Document dir in iCloud container and upload/sync SampleData.zip
    NSURL *ubiquitousPackage = [[ubiq URLByAppendingPathComponent:@"Documents"]URLByAppendingPathComponent:@"SampleData.zip"];
    Mydoc = [[MyDocument alloc] initWithFileURL:ubiquitousPackage];
    Mydoc.zipDataContent = data;

    [Mydoc saveToURL:[Mydoc fileURL] forSaveOperation:UIDocumentSaveForCreating completionHandler:^(BOOL success)
     {
         if (success)
         {
             NSLog(@"SampleData.zip: Synced with icloud");
         }
         else
             NSLog(@"SampleData.zip: Syncing FAILED with icloud");

     }];
}



  // 2 Download data from the iCloud Container

- (IBAction)GetData:(id)sender {

    //--------------------------Get data back from iCloud -----------------------------//
    id token = [[NSFileManager defaultManager] ubiquityIdentityToken];
    if (token == nil)
    {
        NSLog(@"ICloud Is not LogIn");
    }
    else
    {
        NSLog(@"ICloud Is LogIn");

        NSError *error = nil;
        NSURL *ubiq = [[NSFileManager defaultManager]URLForUbiquityContainerIdentifier:nil];// in place of nil you can add your container name
        NSURL *ubiquitousPackage = [[ubiq URLByAppendingPathComponent:@"Documents"]URLByAppendingPathComponent:@"SampleData.zip"];
        BOOL isFileDounloaded = [[NSFileManager defaultManager]startDownloadingUbiquitousItemAtURL:ubiquitousPackage error:&error];
        if (isFileDounloaded) {
            NSLog(@"%d",isFileDounloaded);
            NSString *documentsDirectory = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
            //changing the file name as SampleData.zip is already present in doc directory which we have used for upload
            NSString* fileName = [NSString stringWithFormat:@"RecSampleData.zip"];
            NSString* fileAtPath = [documentsDirectory stringByAppendingPathComponent:fileName];
            NSData *dataFile = [NSData dataWithContentsOfURL:ubiquitousPackage];
            BOOL fileStatus = [dataFile writeToFile:fileAtPath atomically:NO];
            if (fileStatus) {
                NSLog(@"success");
            }
        }
        else{
            NSLog(@"%d",isFileDounloaded);
        }
    }
}

//3 voila its done :)