小编GOM*_*802的帖子

你好，我无法用 Cocoapods 解决这个问题，任何人都可以帮助我是我第一次使用这个 import- import 'package:flutter_vlc_player/flutter_vlc_player.Dart'; 而不是什么可能是错的。

（我在 mac 上使用 android studio）

错误：

在调试模式下在 iPhone 11 上启动 lib/main.dart... 运行 pod install... 1,3s CocoaPods' 输出：？准备

Analyzing dependencies

Inspecting targets to integrate
  Using `ARCHS` setting to build architectures of target `Pods-Runner`: (``)

Fetching external sources
-> Fetching podspec for `Flutter` from `Flutter`
-> Fetching podspec for `flutter_vlc_player` from `.symlinks/plugins/flutter_vlc_player/ios`

Resolving dependencies of `Podfile`
  CDN: trunk Relative path: CocoaPods-version.yml exists! Returning local because checking is only perfomed in repo update
[!] CocoaPods could …

我有一个用 Flutter 编写的程序，我想将表单居中于屏幕中间，但我无法实现。我尝试使用对齐，但我认为我没有正确使用它！有人可以帮助我吗？谢谢

class _Defini extends State<Definicoes> {

  GlobalKey<FormState> _formkey = GlobalKey<FormState>();

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      bottomNavigationBar:
        ...

      body: Container(
        color: Colors.amber.withOpacity(0.80),
    child: Align(
    alignment: Alignment(0, 0),
        child: Form(
          key: _formkey,
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.stretch,
            children: <Widget>[
              Container(
                        width: 300,
                        height: 300,
                        child: TextFormField(
                          keyboardType: TextInputType.number,
                          decoration: InputDecoration(
                              labelText: "RaspberryPi",
                              labelStyle: TextStyle(color: Colors.white)),
                          textAlign: TextAlign.center,
                          style: TextStyle(color: Colors.white, fontSize: 25.0),
                          validator: (value) {
                            if (value.isEmpty){
                              return "Insira";
                            }
                          },
                        ),
                      ),
                      Container(
                        decoration: BoxDecoration(
                          boxShadow: [
                            BoxShadow( …