undefined is not an object(evaluating 'this.props._navigate.replace/push') - react-native

Question

I'm new to React Native and trying ( followed a tutorial ) to move to another screen when a button is clicked, this is the updated code I have and a photo of the error I get when pressing the button.
index.ios.js:
export default class Application extends Component {
constructor(){
super();
}
renderScene(route, navigator){
if(route.name == 'login'){
return <Login navigator={navigator}/>
}else if(route.name == 'home'){
return <Home navigator={navigator}/>
}
}
render() {
return <Navigator
initialRoute={{name: 'login'}}
renderScene={this.renderScene.bind(this)}/>
}
}
LoginForm:
export default class LoginForm extends Component{
constructor(props){
super(props);
this.navigate = this.navigate.bind(this);
}
navigate(routeName){
this.props.navigator.replace({
name: routeName,
Component: Home
});
}
render(){
return(
<View style={mStyle.container}>
<StatusBar barStyle='light-content'/>
<TouchableOpacity>
<Text style={mStyle.btnText}>
LOGIN WITH FACEBOOK
</Text>
</TouchableOpacity>
<TouchableOpacity onPress={()=>this.navigate('home')}>
<Text style={mStyle.noLoginTxt}>
CONTINUE WITHOUT LOGIN
</Text>
</TouchableOpacity>
</View>
);
}
}
I'm trying to move from login screen to home screen when button is clicked.
I get this problem when pressing the button on the emulator:

Answer 1

A couple of problems that you are facing.
1.- The syntax is:
this.props.navigator.{any_method}
Such as:
this.props.navigator.push
this.props.navigator.replace
Not
this.props._navigate.{any_method}
2.- If you have child views make sure you are sending to the childs the Navigator property such as.
<View>
<MyChildComponent navigator={this.props.navigator} />
</View>
3.- Make sure your child view gets the props from the parent on the constructor.
Change
constructor(){
super();
this._navigate = this._navigate.bind(this);
}
To
constructor( props ){
super( props );
// The following line is not required since you are using an arrow function to call this one.
// this._navigate = this._navigate.bind(this);
}

Answer 2

It is because there is a mismatch between property you use in Navigator and in your component
Change
_navigate(name){
this.props._navigate.replace({ //I also tried push, same problem.
name
});
}
to
_navigate(name){
this.props.navigator.replace({ //I also tried push, same problem.
name
});
}