fix(input): stop ios from hiding keyboard on focus change

src/util/keyboard.ts

@@ -2,7 +2,7 @@ import { Injectable, NgZone } from '@angular/core';
 
 import { Config } from '../config/config';
 import { DomController } from './dom-controller';
-import { focusOutActiveElement, hasFocusedTextInput, nativeTimeout } from './dom';
+import { focusOutActiveElement, hasFocusedTextInput, nativeTimeout, clearNativeTimeout } from './dom';
 import { Key } from './key';
 
 
@@ -23,19 +23,28 @@ import { Key } from './key';
  */
 @Injectable()
 export class Keyboard {
+  private _tmr: any;
 
   constructor(config: Config, private _zone: NgZone, private _dom: DomController) {
     _zone.runOutsideAngular(() => {
       this.focusOutline(config.get('focusOutline'), document);
 
       window.addEventListener('native.keyboardhide', () => {
-        // this custom cordova plugin event fires when the keyboard will hide
-        // useful when the virtual keyboard is closed natively
-        // https://github.com/driftyco/ionic-plugin-keyboard
-        if (hasFocusedTextInput()) {
-          focusOutActiveElement();
-        }
+        clearNativeTimeout(this._tmr);
+        this._tmr = nativeTimeout(() => {
+          // this custom cordova plugin event fires when the keyboard will hide
+          // useful when the virtual keyboard is closed natively
+          // https://github.com/driftyco/ionic-plugin-keyboard
+          if (hasFocusedTextInput()) {
+            focusOutActiveElement();
+          }
+        }, 80);
       });
+
+      window.addEventListener('native.keyboardshow', () => {
+        clearNativeTimeout(this._tmr);
+      });
+
     });
   }