snapshot.hasData) { }
[VERBOSE-2:ui_dart_state.cc(148)] Unhandled Exception: NoSuchMethodError: The getter 'iterator' was called on null.Receiver: null</e
9a365b0597e198ceac41966db1d6f47de66a86bb99e3e5a811c3030"}[ERROR:flutter/lib/ui/ui_dart_state.cc(199)] Unhandled Exception: NoSuchMethodError: The getter 'status' was called on null.( 7370): true
E/flutter ( 73
你好,我是Flutter的初学者,这里是问题-我试图建立一个注册表单与验证和‘注册’按钮,它必须显示数据是否有效,但有'NoSuchMethodError:方法‘验证’被调用在null‘时,我按下这个’return "email can't be less than 2 letter"; return nullreturn "Password can't be less than 4 let
在尝试将List从一个屏幕传递到另一个屏幕时,我遇到了以下错误。数据正在从async函数中传递。我需要根据从数据库获取的数据打开另一个屏幕。答案提到对我不起作用。这是错误。: [ERROR:flutter/lib/ui/ui_dart_state.cc(157)] Unhandled Exception: NoSuchMethodError: The
getter 'focusScopeNode' was called on null.E/flutter (26