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in Technique[技术] by (71.8m points)

flutter怎么让setState变成同步的

void test() async{
    setState(() {
      _showWidget = LineSpinFadeLoaderIndicator(ballColor: Colors.blue);
    });
    for(int i =0;i<1000000;i++){
      print(i);
    }
}

如上图,在函数里执行了一个setState,现在的问题是,for循环比setState先出结果了,因为setState是异步的,怎么让setState变成同步的


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by (71.8m points)

搜了一下,没有发现 setState 同步的任何内容,setState设置为异步优势就在于不卡操作,比如渲染一个长列表,你期望的是渲染完成后再执行其他操作,异步难道不香吗?


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