將文件夾從服務器下載到本地iPad/iPhone

Question

我想要創建一個應用程序，該應用程序會自動從我自己的服務器下載文件夾並將其存儲在本地iPad/iPhone上。我怎樣才能做到這一點，該文件夾存儲在本地iDevice上？因此，我以後如何訪問它？非常感謝您的幫助

Answer 1

這樣做實際上是把一個壓縮文件中的所有例如圖片，下載並使用此代碼解壓它在實際設備上的最佳方式：

dispatch_queue_t queue = dispatch_get_global_queue(
                DISPATCH_QUEUE_PRIORITY_DEFAULT, 0); 
dispatch_async(queue, ^{ 
    NSURL *url = [NSURL URLWithString:@"someDirectory/newPics.zip"]; 
    NSError *error = nil; 
    // 2 
    NSData *data = [NSData dataWithContentsOfURL:url options:0 error:&error]; 

    if(!error) 
    { 
     // 3 
     NSArray *paths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES); 
     NSString *path = [paths objectAtIndex:0]; 
     NSString *zipPath = [path stringByAppendingPathComponent:@"newPics.zip"]; 

     [data writeToFile:zipPath options:0 error:&error]; 

     if(!error) 
     { 

      ZipArchive *za = [[ZipArchive alloc] init]; 
      // 1 
      if ([za UnzipOpenFile: zipPath]) { 
       // 2 
       BOOL ret = [za UnzipFileTo: path overWrite: YES]; 
       if (NO == ret){} [za UnzipCloseFile]; 

       // 3 
       NSString *imageFilePath = [path stringByAppendingPathComponent:@"newPics/pic1.png"]; 
       //[self removeImage:zipPath]; 


       [[NSFileManager defaultManager] removeItemAtPath:zipPath error: &error]; 

       dispatch_async(dispatch_get_main_queue(), ^{ 

         NSURL *fileURL = [NSURL fileURLWithPath:imageFilePath]; 
         [_webV loadRequest:[NSURLRequest requestWithURL:fileURL]]; 



       }); 

      } 

     } 
     else 
     { 
      NSLog(@"Error saving file %@",error); 
     } 
    } 
    else 
    { 
     NSLog(@"Error downloading zip file: %@", error); 
    } 

}); 

這是最好的辦法，快速和可靠。