How to implement game trial and game purchase in uniapp

UniApp is a cross-platform development framework that can be written once and run on multiple terminals. In the game development process, it is very important to implement game trial and game purchase functions, which can help developers increase user stickiness and game revenue. This article will introduce how to implement game trial and game purchase functions in UniApp, and provide specific code examples.

1. Game trial function implementation
The game trial function allows users to experience the game content for a period of time before purchasing the game, so that users can better evaluate the quality and fun of the game. The key to enabling game trials is to control access to game content.

1. Add a trial button to the initial interface of the game, and click the button to trigger the trial function.
2. When the trial function is triggered, use the uni.setStorageSync() method provided by UniApp to record the timestamp when the trial starts.
3. In each level or scene of the game, a judgment is made at the beginning of the level or scene to determine whether the time difference between the current time and the trial start time exceeds the trial limit.
4. If the trial limit is exceeded, the game will be forced to stop and the user will be prompted that the trial is over.
5. If the trial limit is not exceeded, the game will proceed normally.

The following is the relevant sample code:

// 游戏初始界面
<view>
  <!-- 试玩按钮 -->
  <button @click="startTrial">试玩</button>
</view>

<script>
export default {
  methods: {
    startTrial() {
      // 记录试玩开始时间
      uni.setStorageSync('trialStartTime', Date.now());
      
      // 跳转到游戏界面
      uni.navigateTo({
        url: '/pages/game/game'
      });
    }
  }
}
</script>

// 游戏界面
<view>
  <!-- 游戏内容 -->
</view>

<script>
export default {
  onLoad() {
    // 判断是否已经超过试玩限制时长
    const trialStartTime = uni.getStorageSync('trialStartTime');
    
    if (Date.now() - trialStartTime > 10 * 60 * 1000) {
      uni.showToast({
        title: '试玩已结束',
        icon: 'none'
      });
      
      // 停止游戏
      // ...
    } else {
      // 正常进行游戏
      // ...
    }
  }
}
</script>

2. Game purchase function implementation
The game purchase function is a paid function that allows users to purchase game content or purchase unlocked games. The key to realizing game purchase is to integrate a third-party payment platform and give the user the corresponding game content permissions after the user successfully purchases.

1. Integrate third-party payment platforms, such as WeChat payment or Alipay payment, to implement user payment logic.
2. After the user successfully purchases, use the uni.setStorageSync() method provided by UniApp to record the game content that the user has purchased.
3. In each level or scene of the game, it is judged at the beginning of the level or scene whether the user has purchased the corresponding game content. If not, the user is prompted to purchase.
4. If the user has purchased, the game will proceed normally.

The following is the relevant sample code:

// 游戏界面
<view>
  <!-- 游戏内容 -->
  <button @click="buy">购买</button>
</view>

<script>
export default {
  methods: {
    buy() {
      // 调用第三方支付平台进行支付
      // ...
      
      // 支付成功后记录用户已购买的游戏内容
      uni.setStorageSync('hasPurchased', true);
    }
  }
}
</script>

// 游戏关卡或场景
<view>
  <!-- 游戏关卡或场景内容 -->
</view>

<script>
export default {
  onLoad() {
    // 判断用户是否已购买
    const hasPurchased = uni.getStorageSync('hasPurchased');
    
    if (!hasPurchased) {
      uni.showToast({
        title: '请购买游戏内容',
        icon: 'none'
      });
      
      // 停止游戏
      // ...
    } else {
      // 正常进行游戏
      // ...
    }
  }
}
</script>

Through the above code sample, we can implement the game trial and game purchase functions in UniApp. Of course, the specific implementation method needs to be adjusted and improved according to specific game needs.

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