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The editor of this article introduces in detail "how to develop WeChat Mini Programs Game Friends list". The content is detailed, the steps are clear, and the details are handled properly. I hope this article "how to develop WeChat Mini Programs Game Friends list" can help you solve your doubts. Let's follow the editor's ideas to learn new knowledge.

Save each user's score

To save each user's score, you need to call Wechat's cloud storage API to persist the user's score.

/ / Save user data, pay attention to limit the capacity of a single data item to 1024 bytes, / / limit the total number of individual user data entries to 1024 wx.setUserCloudStroage (Object) copy code / / Storage maximum score var score = 100 KVDataList kvScore = {"key": "score", "value": score}; wx.setUserCloudStroage ({"KVDataList": [kvScore]}, "success": function () {/ /}) Copy the code to get the friend list and get the score of the friend.

After saving the player's scores in the game, you need to call Wechat's cloud storage API wx.getFirendCloudStorage to get the player's Wechat friend data, so you can get the highest score for each friend.

It is worth mentioning that this interface of Wechat covertly uses its Wechat social relationship chain internally.

Returns the list of users who have called the wx.setUserCloudStroage interface.

Render the ranking

Sort the scores to get a ranking

Let sharedCanvas = wx.getSharedCanvas () function drawRankList (data) {data.forEach ((item, index) = > {/ /...})} wx.getFriendCloudStorage ({success: res = > {let data = res.data drawRankList (data)}}) copy the code

Note that this sharedCanvas is a unique canvas and is not the same thing as the canvas in Mini Game.

Use sharedCanvas to customize the user rankings that display players

Important explanation

The Wechat interfaces mentioned above can only be used in the subdomains of Wechat Mini Game. The Wechat official website is also called open data domain, but it should be called closed data domain. Why do you say that? Because the js code execution environment of the subdomain and the code execution environment of Mini Game itself are isolated. The two can not communicate, the subdomain can only receive external messages (such as the highest score of the game), can not send messages (can not send the user's friend chain data to the developer server), memory is not shared, that is, developers can not get Wechat's social relationship chain data. Under such closed conditions, all the developer can do is to display the ranking data as personalized UI elements on the canvas of the subdomain.

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