使用UIImagePicker时，如何摆脱UIImagePickerControllerEditedImage返回的图像上的黑色底线

Question

使用UIImagePicker时，它允许进入编辑模式。然后对于使用横向模式拍摄的图像，如果用户不在UIImagePicker中手动缩放，则图像的顶部和底部会出现黑色条纹/背景。有没有办法摆脱它，使图像的那部分透明？

Answer 1

#pragma mark UIImagePickerControllerDelegate

- (void)imagePickerController:(UIImagePickerController *)picker  didFinishPickingMediaWithInfo:(NSDictionary *)info {

    UIImage *img = nil;

    CGRect cropRect = [[info valueForKey:UIImagePickerControllerCropRect] CGRectValue];

    if (cropRect.origin.y < 0) {

        img = [info objectForKey:UIImagePickerControllerOriginalImage];

    } else {

        img = [info objectForKey:UIImagePickerControllerEditedImage];

    }

}