如何从UIImagePickerController库中调整图像大小

UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];
imagePicker.delegate = self;

imagePicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info {
    UIImage *originalImage = info[UIImagePickerControllerOriginalImage];
    
    // 在这里对图片进行调整大小的操作
    UIImage *resizedImage = [self resizeImage:originalImage toSize:CGSizeMake(newWidth, newHeight)];
    
    // 在这里进行其他处理或展示调整大小后的图片
}

- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker {
    // 用户取消选择图片的操作
}

- (UIImage *)resizeImage:(UIImage *)image toSize:(CGSize)size {
    UIGraphicsBeginImageContextWithOptions(size, NO, 0.0);
    [image drawInRect:CGRectMake(0, 0, size.width, size.height)];
    UIImage *resizedImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return resizedImage;
}