UIImage 壓縮

1.改變圖片大小 [cpp]   -(UIImage*)imageWithImage:(UIImage*)image scaledToSize:(CGSize)newSize   {       // Create a graphics image context       UIGraphicsBeginImageContext(newSize);              // Tell the old image to draw in this new context, 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;   }         2.改變圖片質量 NSData *imageData = UIImageJPEGRepresentation(imageNew, 0.0001);       code  UIImage *imageNew;     imageNew = [info objectForKey:@"UIImagePickerControllerOriginalImage"];     imageNew = [self imageWithImage:imageNew scaledToSize:CGSizeMake(100, 100)];     NSData *imageData = UIImageJPEGRepresentation(imageNew, 0.0001);          m_selectImage = [UIImage imageWithData:imageData];