Set default of viewIsInsideTabBar to true. Remember lastKeyboardSpace and use this as the default

-Fixes keyboard space being missing when keyboard is open and you move to another View that requires a keyboard space

Author: Kebab

lib/KeyboardAwareMixin.js

@@ -1,7 +1,7 @@
 /* @flow */
 
 import { PropTypes } from 'react'
-import ReactNative, { TextInput, Keyboard, UIManager } from 'react-native'
+import ReactNative, { TextInput, Keyboard, UIManager, Platform } from 'react-native'
 import TimerMixin from 'react-timer-mixin'
 
 import type { Event } from 'react-native'
@@ -10,6 +10,8 @@ const _KAM_DEFAULT_TAB_BAR_HEIGHT: number = 49
 const _KAM_KEYBOARD_OPENING_TIME: number = 250
 const _KAM_EXTRA_HEIGHT: number = 75
 
+var lastKeyboardSpace = 0;
+
 const KeyboardAwareMixin = {
   mixins: [TimerMixin],
   propTypes: {
@@ -25,12 +27,13 @@ const KeyboardAwareMixin = {
       extraHeight: _KAM_EXTRA_HEIGHT,
       extraScrollHeight: 0,
       enableResetScrollToCoords: true,
+      viewIsInsideTabBar: true
     }
   },
 
   setViewIsInsideTabBar: function (viewIsInsideTabBar: bool) {
     this.viewIsInsideTabBar = viewIsInsideTabBar
-    const keyboardSpace = viewIsInsideTabBar ? _KAM_DEFAULT_TAB_BAR_HEIGHT : 0
+    const keyboardSpace = lastKeyboardSpace; //viewIsInsideTabBar ? _KAM_DEFAULT_TAB_BAR_HEIGHT : 0
     if (this.state.keyboardSpace !== keyboardSpace) {
       this.setState({keyboardSpace})
     }
@@ -55,6 +58,7 @@ const KeyboardAwareMixin = {
     if (this.props.viewIsInsideTabBar) {
       keyboardSpace -= _KAM_DEFAULT_TAB_BAR_HEIGHT
     }
+    lastKeyboardSpace = keyboardSpace;
     this.setState({keyboardSpace})
     // Automatically scroll to focused TextInput
     if (this.props.enableAutoAutomaticScroll) {
@@ -86,6 +90,7 @@ const KeyboardAwareMixin = {
 
   resetKeyboardSpace: function () {
     const keyboardSpace: number = (this.props.viewIsInsideTabBar) ? _KAM_DEFAULT_TAB_BAR_HEIGHT + this.props.extraScrollHeight : this.props.extraScrollHeight
+    lastKeyboardSpace = keyboardSpace;
     this.setState({keyboardSpace})
     // Reset scroll position after keyboard dismissal
     if (this.props.enableResetScrollToCoords === false) {