Question

有没有办法在Silverstripe 4中像这样扩展图像类？

class MyImage extends Image {
    public function generateRotateClockwise(GD $gd)    {
        return $gd->rotate(90);
    }

    public function generateRotateCounterClockwise(GD $gd)    {
        return $gd->rotate(270);
    }

我在Silverstripe网页上找不到任何内容。

感谢您的帮助。

Answer 1

You can do this using the Injector to rewrite the class that is loaded when SilverStripe asks for Image, but with Image it's not recommended. If you wanted to, you'd do this:

# File: mysite/_config/injector.yml
---
Name: myinjectorconfig
---
SilverStripe\Core\Injector\Injector:
  SilverStripe\Assets\Image:
    class: MyImage

And your class would look like the example in your question.

Instead if you want to add two new PHP methods you can use an Extension:

use SilverStripe\ORM\DataExtension;

class MyImageExtension extends DataExtension
{
    public function generateRotateClockwise(GD $gd)
    {
        return $gd->rotate(90);
    }

    public function generateRotateCounterClockwise(GD $gd)
    {
        return $gd->rotate(270);
    }
}

Then apply it to Image with configuration:

# File: mysite/_config/extensions.yml
---
Name: myextensions
---
SilverStripe\Assets\Image:
  extensions:
    - MyImageExtension

This adds the two public methods to wherever an Image class is used.

扩展图像类

1 个答案: