添加一个弹窗管理demo,可以用作一系列的对话，等等！

NotifyCenter/assets/Script/HelloWorld.js

@@ -0,0 +1,81 @@
+cc.Class({
+    extends: cc.Component,
+
+    properties: {
+        label: {
+            default: null,
+            type: cc.Label
+        },
+        prefabAlert: cc.Prefab,
+        // defaults, set visually when attaching this script to the Canvas
+        text: 'Hello, World!'
+    },
+
+    // use this for initialization
+    onLoad: function () {
+        this.label.string = this.text;
+        this.notifyCenterScript = this.node.addComponent('NotifyCenter');
+        this.notifyCenterScript.init(this.initInfos());
+    },
+
+    /**
+     * 设置数据
+     */
+    initInfos() {
+        let infos = [{
+                args: {
+                    content: 'hello',
+                },
+                prefab: this.prefabAlert,
+                componentName: 'AlertUi',
+                seft: this,
+                before: function () {
+                    console.log('hello before');
+                },
+                after: function () {
+                    console.log('hello after');
+                }
+            },
+            {
+                args: {
+                    content: 'I am fine,thank you',
+                },
+                seft: this,
+                prefab: this.prefabAlert,
+                componentName: 'AlertUi',
+                before: function () {
+                    console.log('I before');
+                },
+                after: function () {
+                    console.log('I after');
+                }
+            }, {
+                args: {
+                    content: 'Today is god day , are you',
+                },
+                seft: this,
+                prefab: this.prefabAlert,
+                componentName: 'AlertUi',
+                after: function () {
+                    console.log('Today after');
+                }
+            }, {
+                args: {
+                    content: 'Yes,this my day',
+                },
+                seft: this,
+                prefab: this.prefabAlert,
+                componentName: 'AlertUi',
+                before: function () {
+                    console.log('Today after');
+                }
+            }
+        ]
+        return infos;
+    },
+
+    // called every frame
+    update: function (dt) {
+
+    },
+});