请检查图表代码中非空判断
画面管理
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所有的代码图表dataset需要做非空判断,参考这个帖子https://bbs.airiot.link/topic/677/%E5%9C%A8%E6%9B%B4%E6%96%B0%E5%90%8E%E5%87%BA%E7%8E%B0%E4%BA%86%E8%BF%99%E4%B8%AA%E6%8F%90%E7%A4%BA-%E8%AF%B7%E9%97%AE%E8%BF%99%E4%B8%AA%E6%8F%90%E7%A4%BA%E5%9C%A8%E5%93%AA%E9%87%8C%E8%83%BD%E7%BB%99%E5%8E%BB%E6%8E%89%E5%90%97/2?_=1720402022331