export Picker extractPickerItems as a static method

Author: ethanshar

src/components/picker/index.js

@@ -143,7 +143,7 @@ class Picker extends PureComponent {
       value: props.value,
       prevValue: undefined,
       selectedItemPosition: 0,
-      items: this.extractPickerItems(props)
+      items: Picker.extractPickerItems(props)
     };
 
     if (props.mode === Picker.modes.SINGLE && Array.isArray(props.value)) {
@@ -183,6 +183,12 @@ class Picker extends PureComponent {
     return null;
   }
 
+  static extractPickerItems(props) {
+    const {children} = props;
+    const items = React.Children.map(children, child => ({value: child.props.value, label: child.props.label}));
+    return items;
+  }
+
   getAccessibilityInfo() {
     const {placeholder} = this.props;
 
@@ -196,12 +202,6 @@ class Picker extends PureComponent {
     };
   }
 
-  extractPickerItems(props) {
-    const {children} = props;
-    const items = React.Children.map(children, child => ({value: child.props.value, label: child.props.label}));
-    return items;
-  }
-
   getContextValue = () => {
     const {value, searchValue} = this.state;
     const {mode, getItemValue, getItemLabel, renderItem, showSearch} = this.props;

typings/components/Picker.d.ts

@@ -68,4 +68,5 @@ export class Picker extends BaseComponent<PickerProps & ColorsModifiers> {}
 
 export namespace Picker {
   export class Item extends BaseComponent<PickerItemProps> {}
+  export function extractPickerItems(props: any): [{value: string, label: string}]
 }