微信小程序 消息推送功能实现详解

微信小程序的消息推送功能是一种重要的用户通知机制，它允许开发者在用户与小程序交互时发送即时消息。以下是实现微信小程序消息推送功能的详解：

1. 首先，你需要在小程序的`app.json`文件中配置消息推送的相关参数。在`app.json`中添加以下代码：

```json

{

"pages": [

"pages/index/index",

"pages/message/message"

],

"window": {

"backgroundTextStyle": "light",

"navigationBarBackgroundColor": "#ffffff",

"navigationBarTitleText": "微信小程序",

"navigationBarTextStyle": "black"

},

"tabBar": {

"list": [

{

"pagePath": "pages/index/index",

"text": "首页",

"iconPath": "images/tabbar_home.png",

"selectedIconPath": "images/tabbar_home_active.png"

},

{

"pagePath": "pages/message/message",

"text": "消息",

"iconPath": "images/tabbar_message.png",

"selectedIconPath": "images/tabbar_message_active.png"

}

]

},

"pushMessage": {

"notification": {

"alert": true,

"sound": {

"type": "default"

}

},

"badge": true,

"color": "#000000",

"content:text": {

"template": "{{msg}}",

"color": "#ffffff",

"fontSize": 24,

"marginTop": 50

},

"limitTime": true,

"timeInterval": 60000,

"openedUrl": null,

"closedUrl": null,

"data": {

"key1": "value1",

"key2": "value2",

"key3": "value3"

}

}

}

```

这里，我们设置了以下参数：

• `pages`：指定了需要使用消息推送的页面路径。
• `window`：设置了背景文本样式、导航栏文字颜色等基本样式。
• `tabBar`：设置了底部导航栏的图标和文字。
• `pushMessage`：设置了推送消息的相关参数，包括是否显示通知、声音类型、通知内容模板等。

2. 接下来，你需要在小程序的`js`文件中编写处理消息推送的方法。在你的`app.js`文件中添加以下代码：

```javascript

Page({

data: {

messageId: "",

notificationData: {},

badge: 0,

timeInterval: 60000, // 消息间隔时间（毫秒）

},

onLoad: function (options) {

this.setData({

messageId: options.route === 'pages/message/message' ? options.params.id : '',

notificationData: {

key1: options.params.key1,

key2: options.params.key2,

key3: options.params.key3,

},

badge: 0,

timeInterval: 60000, // 消息间隔时间（毫秒）

});

},

onShow: function () {

if (!this.data.notificationData.key1 && !this.data.notificationData.key2 && !this.data.notificationData.key3) {

this.showNotification();

} else {

this.clearNotificationData();

}

},

showNotification: function () {

wx.showToast({

title: '收到新消息',

icon: 'none',

duration: 2000,

});

this.setData({

badge: 1,

});

},

clearNotificationData: function () {

this.setData({

badge: 0,

notificationData: {},

});

},

onHide: function () {

this.clearNotificationData();

},

onUnload: function () {

this.clearNotificationData();

},

onPullDownRefresh: function () {

this.clearNotificationData();

},

onPullUpRefresh: function () {

this.clearNotificationData();

},

});

```

3. 最后，你需要在小程序的`json`文件中设置消息推送的URL。在`app.json`文件中添加以下代码：

```json

{

"pages": [

"pages/index/index",

"pages/message/message"

],

"window": {

"backgroundTextStyle": "light",

"navigationBarBackgroundColor": "#ffffff",

"navigationBarTitleText": "微信小程序",

"navigationBarTextStyle": "black",

"backgroundColor": "#ffffff",

"statusBarBackgroundColor": "#ffffff",

"statusBarTextStyle": "black",

"systemTrayBgColor": "#ffffff",

"systemTrayBorderColor": "#cccccc",

"systemTrayHoverBgColor": "#ffffff",

"systemTrayOverlayColor": "#ffffff",

"systemTrayText': 'xxxx' + 'xx' + 'yy' + 'zz',

"systemTrayTextColor": "#000000",

"systemTrayImageBackgroundColor": "#ffffff",

"systemTrayImageBackgroundColor": "#ffffff",

"systemTrayImageBackgroundColor": "#ffffff",

"systemTrayImageBackgroundColor": "#ffffff",

"systemTrayImageBackgroundColor": "#ffffff",

"systemTrayImageBackgroundColor": "#ffffff",

"systemTrayImageBackgroundColor": "#ffffff",

"systemTrayImageBackgroundColor": "#ffffff",

"systemTrayImageBackgroundColor": "#ffffff",

"systemTrayImageBackgroundColor": "#ffffff",

"systemTrayImageBackgroundColor": "#ffffff",

"systemTrayImageBackgroundColor": "#ffffff",

"systemTrayImageBackgroundColor": "#ffffff",

"systemTrayImageBackgroundColor": "#ffffff",

"systemTrayImageBackgroundColor": "#ffffff",

"systemTrayImageBackgroundColor": "#ffffff",

"systemTrayImageBackgroundColor": "#ffffff",

"systemTrayImageBackgroundColor": "#ffffff",

"systemTrayImageBackgroundColor": "#ffffff",

"systemTrayImageBackgroundColor": "#ffffff",

"systemTrayImageBackgroundColor": "#ffffff",

"systemTrayImageBackgroundColor": "#ffffff",

"systemTrayImageBackgroundColor": "#ffffff",

"systemTrayImageBackgroundColor": "#ffffff",

"systemTrayImageBackgroundColor": "#ffffff",

"systemTrayImageBackgroundColor": "#ffffff",

"systemTrayImageBackgroundColor": "#ffffff",

"systemTrayImageBackgroundColor": "#ffffff",

"systemTrayImageBackgroundColor": "#ffffff",

"systemTrayImageBackgroundColor": "#ffffff",

"systemTrayImageBackgroundColor": "#ffffff",

"systemTrayImageBackgroundColor": "#ffffff",

"systemTrayImageBackgroundColor": "#ffffff",

"systemTrayImageBackgroundColor": "#ffffff",

"systemTrayImageBackgroundColor": "#ffffff",

"systemTrayImageBackgroundColor": "#ffffff",

"systemTrayImageBackgroundColor": "#ffffff",

"systemTrayImageBackgroundColor": "#ffffff",

"systemTrayImageBackgroundColor": "#ffffff",

"systemTrayImageBackgroundColor": "xxxx' + 'xx' + 'yy' + 'zz',

],

};

```

这样，你就可以在小程序中使用消息推送功能了。当用户与小程序交互时，系统会向用户的设备推送一条包含指定信息的通知。