Button

Let's build a clear due date button for the EditTask component and only selectively enable it if a due date has been selected for the to-do item. The Button component in React Native should help us render one quickly.

The Button component accepts a couple of props; the following four will be used in our application:

• color: This is a string (or stringified hex) that sets either the text color on iOS or the background color on Android
• disabled: This is a Boolean that disables the button if set to true; it defaults to false
• onPress: This is a callback that is fired when a button is pressed
• title: This is the text to display within the button

A sample Button component can be rendered like this:

<Button 
  color={ 'blue' } 
  disabled={ this.state.buttonDisabled } 
  onPress={ () => alert('Submit button pressed') } 
  title={ 'Submit' }  
/> 

Modify EditTask so that it has the following features:

• It contains a Boolean, titled expanded, in its state to control the open/closed status of...