请优化一以下代码onReady const ctx = wxcreateCanvasContextmyCanvas; thisctx = ctx; 从缓存中获取之前保存的数据 const savedData = wxgetStorageSynccanvasData; if savedData thissetData bh savedDatabh

onReady() { const ctx = wx.createCanvasContext('myCanvas'); this.ctx = ctx;

// 从缓存中获取之前保存的数据 const savedData = wx.getStorageSync('canvasData');

if (savedData) { const { bh, mc, arr1, dw, date, arr2, zt, y, clickCount, rows } = savedData; this.setData({ bh, mc, arr1, dw, date, arr2, zt, y, clickCount, rows }); } else { this.drawTable(); } }