AFNetworking下载后的文件存在

问题描述：

我下载后与AFNetworking下载后发现我的文件存在一些问题... 下载本身没问题，但是当我检查文件的存在后，我找不到它...所以我希望有人能帮助我...AFNetworking下载后的文件存在

在我的代码中，我下载文件，并在完成块，我检查存在（这是因为我之后会被删除）...

NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:@"url to file removed"]]; 
AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc] initWithRequest:request]; 

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); 
NSString *path = [[paths objectAtIndex:0] stringByAppendingPathComponent:@"filename removed"]; 
operation.outputStream = [NSOutputStream outputStreamToFileAtPath:@"filename removed" append:NO]; 

//Track the progress 
[operation setDownloadProgressBlock:^(NSUInteger bytesRead, long long totalBytesRead, long long totalBytesExpectedToRead) 
{ 
    if (totalBytesExpectedToRead > 0) 
    { 
     dispatch_async(dispatch_get_main_queue(), ^{ 
      NSString *progress = [NSString stringWithFormat:@"Downloaded %lld of %lld bytes", 
           totalBytesRead, 
           totalBytesExpectedToRead]; 

      NSLog(@"%@", progress); 
     }); 
    } 
}]; 

[operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) 
{ 
    NSLog(@"File downloaded to %@", path); 

    //Check for existence 
    NSFileManager *filemgr = [NSFileManager defaultManager]; 

    if([filemgr fileExistsAtPath:path]) 
    { 
     NSLog(@"File found"); 
    } else 
    { 
     NSLog(@"File not found"); 
    } 
} failure:^(AFHTTPRequestOperation *operation, NSError *error) 
{ 
    NSLog(@"Error: %@", error); 
}]; 

[operation start];

任何想法可能会出错吗？由于下载本身没问题，所以问题必须在于将文件/文件系统保存在iOS中...

答

您尝试写入的目录是否存在？如果不是，您可能会发现[NSOutputStream outputStreamToFileAtPath:@"filename removed" append:NO]正在返回nil。

先尝试创建目录：

NSFileManager *fm = [NSFileManager defaultManager]; 
NSString *folder = [@"filename removed" stringByDeletingLastPathComponent]; 
if (![fm fileExistsAtPath:folder]) { 
    [fm createDirectoryAtPath:folder 
    withIntermediateDirectories:YES 
        attributes:nil 
         error:nil]; 
}

我希望帮助。

AFNetworking下载后的文件存在

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