feat(nav-controller): remove method

ionic/components/nav/nav-controller.ts

@@ -335,6 +335,26 @@ export class NavController extends Ion {
     return Promise.resolve();
   }
 
+  /**
+   * Removes a view from the nav stack at the specified index.
+   * @param {TODO} index TODO
+   * @returns {Promise} TODO
+   */
+  remove(index) {
+    if (index < 0 || index >= this._views.length) {
+      return Promise.reject("Index out of range");
+    }
+
+    let viewToRemove = this._views[index];
+    if (this.isActive(viewToRemove)){
+      return this.pop();
+    } else {
+      this._remove(index);
+      viewToRemove.destroy();
+      return Promise.resolve();
+    }
+  }
+
   /**
    * Set the view stack to reflect the given component classes.
    * @param {TODO} components  TODO

ionic/components/nav/nav.ts

@@ -437,9 +437,7 @@ class Pane {
 
   showNavbar(hasNavbar) {
     this.navbar = hasNavbar;
-    if (!hasNavbar) {
+    this.renderer.setElementAttribute(this.elementRef, 'no-navbar', hasNavbar ? null : '' );
-      this.renderer.setElementAttribute(this.elementRef, 'no-navbar', '');
-    }
   }
 
 }

ionic/components/nav/test/basic/index.ts

@@ -104,6 +104,7 @@ class SecondPage {
       <p>
         <button id="from3To2" (click)="pop()">Pop (Go back to 2nd)</button>
         <button id="insert" (click)="insert()">Insert first page into history before this</button>
+        <button id="remove" (click)="removeSecond()">Remove second page in history</button>
       </p>
       <div class="yellow"><f></f><f></f><f></f><f></f><f></f><f></f><f></f><f></f><f></f><f></f><f></f><f></f><f></f><f></f><f></f><f></f><f></f><f></f><f></f><f></f></div>
     </ion-content>
@@ -124,6 +125,10 @@ class ThirdPage {
     this.nav.insert(FirstPage, 2);
   }
 
+  removeSecond() {
+    this.nav.remove(1);
+  }
+
 }