fix(ViewController): call onDismiss after transition ends

Closes #5818

ionic/components/alert/test/dismiss/index.ts

@@ -0,0 +1,59 @@
+import { Alert, NavController, App, Page } from 'ionic-angular/index';
+
+
+@Page({
+  templateUrl: 'main.html'
+})
+export class E2EPage {
+
+  constructor(private nav: NavController) {}
+
+	submit() {
+    var alert = Alert.create({
+      title: 'Not logged in',
+      message: 'Sign in to continue.',
+      buttons: [
+        {
+          text: 'Cancel',
+          role: 'cancel'
+        },
+        {
+          text: 'Sign in',
+          handler: () => {
+            console.log('Sign in');
+          }
+        }
+      ]
+    });
+
+    alert.onDismiss((asdf) => {
+      console.log('dismiss');
+      this.nav.push(AnotherPage);
+    });
+
+    this.nav.present(alert);
+	}
+}
+
+@Page({
+  template: `
+    <ion-navbar *navbar>
+      <ion-title>Another Page</ion-title>
+    </ion-navbar>
+    <ion-content padding>
+      Welcome!
+    </ion-content>
+  `
+})
+class AnotherPage {}
+
+
+@App({
+  template: '<ion-nav [root]="root"></ion-nav>'
+})
+class E2EApp {
+  root;
+  constructor() {
+    this.root = E2EPage;
+  }
+}

ionic/components/alert/test/dismiss/main.html

@@ -0,0 +1,22 @@
+<ion-navbar *navbar>
+  <ion-title>
+    Alert Dismiss
+  </ion-title>
+</ion-navbar>
+
+<ion-content>
+
+  <ion-list>
+    <ion-item>
+      <ion-label floating>Input text here</ion-label>
+      <ion-input type="text"></ion-input>
+    </ion-item>
+  </ion-list>
+
+  <div padding>
+    <button primary block (click)="submit()">
+      Submit
+    </button>
+  </div>
+
+</ion-content>

ionic/components/nav/view-controller.ts

@@ -108,8 +108,10 @@ export class ViewController {
   }
 
   dismiss(data?: any, role?: any) {
-    this._onDismiss && this._onDismiss(data, role);
-    return this._nav.remove(this._nav.indexOf(this), 1, this._leavingOpts);
+    return this._nav.remove(this._nav.indexOf(this), 1, this._leavingOpts).then(() => {
+      this._onDismiss && this._onDismiss(data, role);
+      return data;
+    });
   }
 
   /**