Use Native Base Toast To Show Error From Redux Action

Question

I'm using NativeBase in a React Native app. I'm trying to show a Toast component based on an error that is set in an redux action because it happens via a call to the API.

It will show now, but currently I get the warning message:

Warning: Cannot update during an existing state transition (such as within render or another component's constructor). Render methods should be a pure function of props and state; constructor side-effects are an anti-pattern, but can be moved to componentWillMount.

I'm not sure how I could bind this or what I could do to solve the warning.

Render Method

render() {
  return (
    <View>
      {this.renderError()}
      {this.renderForm()}
    </View>
  );
}

Render Error Method

renderError() {
  if (this.props.error.type === 'server') {
    return (
      Toast.show({
        text: this.props.error.message,
        buttonText: 'Okay',
        duration: 5000,
        type: 'danger'
      })
    );
  }
}

Versions

React Native: 0.55.4

Native Base: 2.4.5

Edit: Adding an example for clarity

I need to show a Toast based on the response from the server. For example, if the username and password don't match an account, I need to render the Toast.

Solution:

I ended up creating a ToastService:

import { Toast } from 'native-base';

function showToast(message) {
  return (
    Toast.show({
      text: message,
      buttonText: 'Okay',
      duration: 5000,
      type: 'danger'
    })
  );
}

export default {
  showToast
};

and now in my action I can just call:

ToastService.showToast(data);

Answer 1

You can create a function and call this one outside. But make sure your app is wrap with the Root component of native-base. No need to return a component like you do. Calling this function gonna show the toastr and now you have the freedom to call from anywhere. But make sure Root component wrap your app.

import { Toast } from 'native-base';

export const toastr = {
  showToast: (message, duration = 2500) => {
    Toast.show({
      text: message,
      duration,
      position: 'bottom',
      textStyle: { textAlign: 'center' },
      buttonText: 'Okay',
    });
  },
};

Now inside your action you can call the toastr function

toastr.showToast('Verication code send to your phone.');

Or in redux actions

const signup = values => dispatch => {
  try {
    // your logic here


  } catch (error) {
    toastr.showToast(error.message)
  }
}