gak boleh bisa back

view/WelcomeReg.js

@@ -39,7 +39,14 @@ export default class Welcome extends React.Component {
                     </View>
                     <View style={styles.v_policy}>
                     <View style={{ flex: 1, height: 50, marginRight: 70, marginLeft: 70, justifyContent: 'center' }}>
-                    <TouchableOpacity onPress={()=> this.props.navigation.navigate('Login')}>
+                    <TouchableOpacity onPress={()=> this.props.navigation.reset({
+                        index: 0,
+                        routes: [
+                            {
+                                name: 'Login',
+                            },
+                        ],
+                    })}>
                                 <View style={{ height: 50, borderRadius: 20, backgroundColor: '#CFB368' }}>
                                     <Text style={{ fontFamily: 'Gotham-Black', color: 'black', fontSize: 20, textAlign: 'center', margin: 15 }}>NEXT</Text>
                                 </View>