如何使用完整的数据将 UIImage 写入 NSOutputStream

Question

如何将UIImage发送到NSOutputStream，其中包含完整的数据。我尝试过这段代码，但输出没有写入完整的图像。如何发送带有完整图像数据的输出。

- (void)imagePickerController:(UIImagePickerController *)picker
        didFinishPickingImage:(UIImage *)image
                  editingInfo:(NSDictionary *)editingInfo
{
  NSData *imgData = UIImageJPEGRepresentation(image, 0.2);
    NSMutableData *completeData = [[NSMutableData alloc] initWithBytes:[stringData bytes] length:[stringData length]];
    [completeData appendData:imgData];
    NSInteger bytesWritten = 0;
    while ( imgData.length > bytesWritten )
    {
      while ( ! self.outputStream.hasSpaceAvailable )
           [NSThread sleepForTimeInterval:0.05];
        //sending NSData over to server
        NSInteger writeResult = [self.outputStream write:[imgData bytes]+bytesWritten maxLength:[imgData length]-bytesWritten];
        if ( writeResult == -1 )
            NSLog(@"error code here");
       else
            bytesWritten += writeResult;
    }
}

Answer 1

您只发送imgData

  NSData *imgData = UIImageJPEGRepresentation(image, 0.2);
    NSMutableData *completeData = [[NSMutableData alloc] initWithBytes:[stringData bytes] length:[stringData length]];
    [completeData appendData:imgData];
    NSInteger bytesWritten = 0;
    while ( completeData.length > bytesWritten )
    {
      while ( ! self.outputStream.hasSpaceAvailable )
           [NSThread sleepForTimeInterval:0.05];
        //sending NSData over to server
        NSInteger writeResult = [self.outputStream write:[completeData bytes]+bytesWritten maxLength:[completeData length]-bytesWritten];
        if ( writeResult == -1 )
            NSLog(@"error code here");
       else
            bytesWritten += writeResult;
    }