my.onMemoryWarning

my.onMemoryWarning((res) => {
  console.log('Memory warning level:', res.level);
});

App({
  globalData: {
    cache: {},
    images: []
  },

  onLaunch() {
    my.onMemoryWarning((res) => {
      console.log('Memory warning:', res.level);
      this.releaseMemory(res.level);
    });
  },

  releaseMemory(level) {
    if (level >= 10) {
      // Clear cached data
      this.globalData.cache = {};

      // Clear large image arrays
      this.globalData.images = [];

      console.log('Memory released due to warning');
    }
  }
});

Page({
  data: {
    largeDataSet: [],
    imageUrls: []
  },

  onLoad() {
    my.onMemoryWarning(this.handleMemoryWarning);
    this.loadData();
  },

  handleMemoryWarning(res) {
    if (res.level >= 10) {
      // Keep only essential data
      const essentialData = this.data.largeDataSet.slice(0, 10);
      this.setData({
        largeDataSet: essentialData,
        imageUrls: []
      });

      my.showToast({
        content: 'Cleared cache to free memory'
      });
    }
  },

  onUnload() {
    my.offMemoryWarning(this.handleMemoryWarning);
  }
});