libGDX Stage API 更改

Stage类的API增加了viewport，有两种viewport，一种Scale，一种Extend，一种按尺寸铺满，一种全铺满，原文如下：

If your old Stage construction code looked like this:

stage = new Stage(width, height, false); // OR
stage.setViewport(width, height, false);

Then you need to change it to:

stage = new Stage(new StretchViewport(width, height)); // OR
stage.setViewport(new StretchViewport(width, height));

If your old code looked like this:

stage = new Stage(width, height, true); // OR
stage.setViewport(width, height, true);

Then you need to change it to:

stage = new Stage(new ExtendViewport(width, height)); // OR
stage.setViewport(new ExtendViewport(width, height));

There is another important change, resize used to look like:

public void resize (int width, int height) {
    stage.setViewport(width, height);
}

Now you’ll do this:

public void resize (int width, int height) {
    stage.getViewport().update(width, height, true);
}

The boolean centers the camera if true (only really needed for UIs). It can be omitted, which is the same as false.