update docs

README.MD

@@ -49,27 +49,49 @@ body {
 ```
 + javascript part:
 ```javascript
-  angular.module('TestApp', ['nx.widget']);
+angular.module('TestApp', ['nx.widget']);
 
   angular.module('TestApp').
-  controller('MainCtrl', function ($http, $q, $rootScope) {
-    $rootScope.loading = false;
-    var s1 = $http.get('http://www.baidu.com');
-    var s2 = $http.get('http://www.sina.com');
-    var s3 = $http.get('http://www.163.com');
-    var s4 = $http.get('http://www.qq.com');
-    var s5 = $http.get('http://www.hao123.com');
+    controller('MainCtrl', function ($http, $q, $rootScope) {
+      //Solution 1:Use loading element to show the loading indicator
+      $rootScope.loading = false;
+      var s1 = $http.get('http://www.baidu.com');
+      var s2 = $http.get('http://www.sina.com');
+      var s3 = $http.get('http://www.163.com');
+      var s4 = $http.get('http://www.qq.com');
+      var s5 = $http.get('http://www.hao123.com');
 
-    //you need a VPN if you're a Chinese(Thanks to the GFW)
-    var s6 = $http.get('https://www.google.com/');
+      //you need a svn if you're a chinese
+      var s6 = $http.get('https://www.google.com/');
+
+
+      $q.all([s1, s2, s3, s4, s5]).then(function (responses) {
+        console.log(responses);
+      })
 
 
-    $q.all([s1, s2, s3, s4, s5, s6]).then(function (responses) {
-      console.log(responses);
     })
+    .controller('MainCtrl2', function ($http, $q, $rootScope, nxIsLoading) {
+      //Solution 2:Or you can directly watch nxIsLoading.isLoading method:
+      $rootScope.$watch(nxIsLoading.isLoading,function(inValue){
+        $rootScope.loading = inValue;
+      });
+
+      var s1 = $http.get('http://www.baidu.com');
+      var s2 = $http.get('http://www.sina.com');
+      var s3 = $http.get('http://www.163.com');
+      var s4 = $http.get('http://www.qq.com');
+      var s5 = $http.get('http://www.hao123.com');
+
+      //you need a svn if you're a chinese
+      var s6 = $http.get('https://www.google.com/');
+
 
+      $q.all([s1, s2, s3, s4, s5]).then(function (responses) {
+        console.log(responses);
+      })
 
-  });
+    });
 
 ```