WebMethod 1 : You can use StreamBuilder to do this. This will run the builder method whenever the data in stream changes. Below is a code snippet from one of my sample projects: StreamBuilder> _getContentsList (BuildContext context) { final … WebMay 27, 2024 · Flutter initState 等待异步 function 完成 - Flutter initState wait for async function to complete 2024-04-15 19:19:45 2 2127 flutter / asynchronous / async-await
How to call a function on start in Flutter stateless widgets
WebNov 14, 2024 · The build function in the Statefull widget is synchronous code that runs on the main isolate/thread, therefore the Asynchronous code Future.delayed will wait till the synchronous code "build ()" method completes its duty. The code Future.delayed will then be performed on the main thread, but it will wait zero seconds; the Future class requires ... Web我寫了一個簡短的 flutter 應用程序,它有一個變量需要在我將他發送到另一個 function 之前進行初始化,所以我寫了一個 function 在應用程序啟動時初始化變量。 但由於某種原因,代碼沒有等待 function 結束,我得到了“LateInitializeError”錯誤。 how do you remove moss from bricks
Flutter/Dart: How to use async code inside a non-async method …
Web63lcw9qa 1#. 首先将您的 .docx 文件添加到 assets 文件夹中,与 lib 文件夹相同级别。. 然后像这样将 assets 文件夹添加到 pubspec.yaml. assets: - assets/. 在你的 main.dart 里面添加这个函数后,即 initState () 里面的 readFileFromAssets () ,当应用程序启动时,它将开始从 … WebDec 25, 2024 · Great question. First of all, initState() runs synchronously, it prepares various things needed for build() method to run properly. If you are executing some async function here, it will just return a Future because you can't await it in the initState().In your case you probably need a FutureBuilder.The "proper way" of dealing with futures would … WebJul 11, 2024 · You can directly replace this main function with my code. put variable outside will become global variable. You can call the LoginCheck function in the initState lifecycle method. Thus the function will be executed before the build method. see below. LoginCheck now returns the value of logined and GetUserNum as a list. how do you remove nitrogen from wastewater