v1.0

assets/Script/SceneAdapter.ts

@@ -0,0 +1,25 @@
+const { ccclass, menu } = cc._decorator;
+
+@ccclass
+@menu('Comp/SceneAdapter')
+export default class SceneAdapter extends cc.Component {
+
+    protected onLoad() {
+        this.resize();
+        cc.view.setResizeCallback(this.resize.bind(this));
+    }
+
+    private resize() {
+        let node = this.node;
+        if (cc.sys.isMobile) {
+            node.width = cc.winSize.width;
+            node.height = cc.winSize.height;
+        } else {
+            if (cc.winSize.width / cc.winSize.height > node.width / node.height) {
+                node.scale = cc.winSize.height / node.height;
+            } else {
+                node.scale = cc.winSize.width / node.width;
+            }
+        }
+    }
+}

assets/Script/SceneAdapter.ts.meta

@@ -0,0 +1,10 @@
+{
+  "ver": "1.1.0",
+  "uuid": "e1b90feb-a217-4493-849d-9a611900d683",
+  "importer": "typescript",
+  "isPlugin": false,
+  "loadPluginInWeb": true,
+  "loadPluginInNative": true,
+  "loadPluginInEditor": false,
+  "subMetas": {}
+}