title: React Native App trying to use FlatList inside of Picker
body: <p>I am quite new to React Native but am very familiair to React. I'm having an issue can't seem to resolve. </p>
  
  <pre><code>import React from "react";
  import { Picker, FlatList, View, Text } from "react-native";
  
  var numberArray = ["1", "2", "3", "4"];
  
  // for (var i = 1; i &lt;= 60; i++) {
  //   numberArray.push(i);
  // }
  
  const Input = () =&gt; {
    numberArray.map(arr =&gt; {
      console.log(arr);
    });
    return (
      &lt;Picker
        //   selectedValue={this.state.language}
        style={{ height: 50, width: 100 }}
        //   onValueChange={(itemValue, itemIndex) =&gt;
        //     this.setState({ language: itemValue })
        //   }
      &gt;
        &lt;FlatList
          keyExtractor={title =&gt; title}
          data={numberArray}
          renderItem={({ item }) =&gt; {
            return &lt;Picker.Item label={item} value={item} /&gt;;
          }}
        /&gt;
        &lt;Picker.Item label="test" value="test" /&gt;
      &lt;/Picker&gt;
    );
  };
  
  export default Input;
  </code></pre>
  
  <p>I am trying to get this to work. I want to create an array that contains all the items for the Picker. However, the only Picker Item appearing is the test one I made. Can anyone explain to me what I am doing wrong? Thank you!</p>