React Native get TextInput value and use on the same View using onBlur or onFocus method

Question

I would like to get the value from a TextInput picker (using react-native-material-dropdown) and perform calculations on close of dropdown using the blur method, the dropdown is numeric.

<Dropdown
        label='meals'
        data={data}
        onChangeText={this.onRegularMealChange.bind(this)}
        value={this.props.regularMeal}
      />

would like to do something like:

<View>
          <Text>{amount * this.props.regularMeal}</Text>
        </View>
      </View>

Answer 1

我的减速器有问题。