.

src/pages/_5_Root.js

@@ -41,14 +41,18 @@ export default (props)=>{
         BackHandler.addEventListener(
             'hardwareBackPress',
             ()=>{
+
                 // 소형화 로직
-                return true; 
+                
+                return  props.navigation.isFocused();
             }    
         )
-
+        return () => {
+            console.log('will unmount');
+          }
     },[]);
 
-    const setTabPosition = (data) => {
+    const setTabPosition = (data) => { 
         tabPosition.x = data.x;
         tabPosition.y = data.y;
         tabPosition.w = data.w;