UIImage*img= [self imageWithImageSimple:image scaledToSize:CGSizeMake(210.0, 210.0)];//压缩图片                - (UIImage*)imageWithImageSimple:(UIImage*)image scaledToSize:(CGSize)newSize        {             // Create a graphics image context             UIGraphicsBeginImageContext(newSize); // Tell the old image to draw in this newcontext, with the desired                         // new size             [image drawInRect:CGRectMake(0,0,newSize.width,newSize.height)];                         // Get the new image from the context             UIImage* newImage = UIGraphicsGetImageFromCurrentImageContext();                          // End the context             UIGraphicsEndImageContext();                          // Return the new image.             return newImage;        }