Ipdate single item in tab view

apps/tests/pages/tab-view.ts

@@ -0,0 +1,23 @@
+var observableModule = require("data/observable");
+var vm = new observableModule.Observable();
+function onPageLoaded(args) {
+    var page = args.object;
+    vm.set("firstTitle", "fiiiirst");
+    vm.set("secondTitle", "secondTitle");
+    vm.set("secondIcon", "res://icon");
+    page.bindingContext = vm;
+}
+exports.onPageLoaded = onPageLoaded;
+var i = 0;
+function onTap() {
+    i++;
+    vm.set("firstTitle", "changed " + i);
+    if (i == 3) {
+        vm.set("firstIcon", "res://ic_action");
+    }
+    if (i == 4) {
+        vm.set("firstIcon", "");
+    }
+}
+exports.onTap = onTap;
+//# sourceMappingURL=tab-view.js.map

apps/tests/pages/tab-view.xml

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<Page loaded="onPageLoaded">
+  <TabView>
+    <TabView.items>
+      <TabViewItem title="{{ firstTitle }}" iconSource="{{ firstIcon }}">
+        <TabViewItem.view>
+          <GridLayout>
+            <Button tap="onTap" text="click" />
+          </GridLayout>
+        </TabViewItem.view>
+      </TabViewItem>
+      <TabViewItem title="{{ secondTitle }}" iconSource="{{ secondIcon }}">
+        <TabViewItem.view>
+          <GridLayout>
+            <Label text="Second Tab" verticalAlignment="center" horizontalAlignment="center"/>
+          </GridLayout>
+        </TabViewItem.view>
+      </TabViewItem>
+    </TabView.items>
+  </TabView>
+</Page>