fix(nav-controller): remove duplicated swipeBackEnabled input

src/components/nav/nav.ts

@@ -5,7 +5,6 @@ import { Config } from '../../config/config';
 import { DeepLinker } from '../../navigation/deep-linker';
 import { DomController } from '../../platform/dom-controller';
 import { GestureController } from '../../gestures/gesture-controller';
-import { isTrueProperty } from '../../util/util';
 import { Keyboard } from '../../platform/keyboard';
 import { NavController } from '../../navigation/nav-controller';
 import { NavControllerBase } from '../../navigation/nav-controller-base';
@@ -56,6 +55,7 @@ import { RootNode } from '../split-pane/split-pane';
   providers: [{provide: RootNode, useExisting: forwardRef(() => Nav) }]
 })
 export class Nav extends NavControllerBase implements AfterViewInit, RootNode {
+
   private _root: any;
   private _hasInit: boolean = false;
 
@@ -149,18 +149,6 @@ export class Nav extends NavControllerBase implements AfterViewInit, RootNode {
    */
   @Input() rootParams: any;
 
-  /**
-   * @input {boolean} If true, swipe to go back is enabled.
-   */
-  @Input()
-  get swipeBackEnabled(): boolean {
-    return this._sbEnabled;
-  }
-  set swipeBackEnabled(val: boolean) {
-    this._sbEnabled = isTrueProperty(val);
-    this._swipeBackCheck();
-  }
-
   /**
    * @hidden
    */

src/components/tabs/tab.ts

@@ -233,17 +233,6 @@ export class Tab extends NavControllerBase {
     this._isShown = isTrueProperty(val);
   }
 
-  /**
-   * @input {boolean} If true, swipe to go back is enabled.
-   */
-  @Input()
-  get swipeBackEnabled(): boolean {
-    return this._sbEnabled;
-  }
-  set swipeBackEnabled(val: boolean) {
-    this._sbEnabled = isTrueProperty(val);
-  }
-
   /**
    * @input {boolean} If true, hide the tabs on child pages.
    */

src/navigation/nav-controller-base.ts

@@ -1,4 +1,4 @@
-import { ComponentRef, ComponentFactoryResolver, ElementRef, EventEmitter, NgZone, ReflectiveInjector, Renderer, ViewContainerRef } from '@angular/core';
+import { ComponentRef, Input, ComponentFactoryResolver, ElementRef, EventEmitter, NgZone, ReflectiveInjector, Renderer, ViewContainerRef } from '@angular/core';
 
 import { AnimationOptions } from '../animations/animation';
 import { App } from '../components/app/app';
@@ -9,7 +9,7 @@ import { setZIndex } from './nav-util';
 import { DeepLinker } from './deep-linker';
 import { DomController } from '../platform/dom-controller';
 import { GestureController } from '../gestures/gesture-controller';
-import { isBlank, isNumber, isPresent, assert, removeArrayItem } from '../util/util';
+import { isBlank, isNumber, isPresent, isTrueProperty, assert, removeArrayItem } from '../util/util';
 import { isViewController, ViewController } from './view-controller';
 import { Ion } from '../components/ion';
 import { Keyboard } from '../platform/keyboard';
@@ -49,6 +49,15 @@ export class NavControllerBase extends Ion implements NavController {
 
   id: string;
 
+  @Input()
+  get swipeBackEnabled(): boolean {
+    return this._sbEnabled;
+  }
+  set swipeBackEnabled(val: boolean) {
+    this._sbEnabled = isTrueProperty(val);
+    this._swipeBackCheck();
+  }
+
   constructor(
     public parent: any,
     public _app: App,

src/navigation/nav-controller.ts

@@ -403,6 +403,11 @@ export abstract class NavController {
    */
   config: Config;
 
+  /**
+   * @input {boolean} If true, swipe to go back is enabled.
+   */
+  swipeBackEnabled: boolean;
+
   /**
    * Push a new component onto the current navigation stack. Pass any aditional information
    * along as an object. This additional information is accessible through NavParams