ios 为什么Flutter的CupertinoNavigationBar与CupertinoPageScaffold中的子项重叠?

ttvkxqim  于 11个月前  发布在  iOS
关注(0)|答案(3)|浏览(107)

我有以下widget tree:

@override
  Widget build(BuildContext context) {
    final double topMargin = Platform.isAndroid ? 0 : 105; // TODO: (why margin on iOS?)
    final double interMargin = Platform.isAndroid ? 0 : 10;
    final body = Column(children: <Widget> [
      Padding(
        padding: EdgeInsets.only(left: 10, right: 10, top: topMargin),
        child: Platform.isAndroid // url
        ? TextField(
            decoration: new InputDecoration(hintText: 'Host'),
            maxLines: 1,
            autofocus: true,
            textInputAction: TextInputAction.next,
            controller: _hostController)
        : CupertinoTextField(
            maxLines: 1,
            autofocus: true,
            textInputAction: TextInputAction.next,
            controller: _hostController)),
      Padding(
        padding: EdgeInsets.only(left: 10, top: interMargin, right: 10),
        child: Platform.isAndroid // port
          ? TextField(
              decoration: new InputDecoration(hintText: 'Port'),
              keyboardType: TextInputType.number,
              maxLines: 1,
              controller: _portController)
          : CupertinoTextField(
              keyboardType: TextInputType.number,
              maxLines: 1,
              controller: _portController)),
      Platform.isAndroid
        ? RaisedButton(child: Text('OK'), onPressed: () => _onInputFinished())
        : CupertinoButton(child: Text('OK'), onPressed: () => _onInputFinished())
    ]);
    return Platform.isAndroid
      ? Scaffold(
          appBar: AppBar(title: Text('Server connection')),
          body: body)
      : CupertinoPageScaffold(
          navigationBar: CupertinoNavigationBar(middle: Text('Server connection')),
          child: body);
  }

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只有在我将顶部边距添加到主体部件时,它看起来才可以:

final double topMargin = Platform.isAndroid ? 0 : 105; // TODO: (why margin on iOS?)
...


的数据
如果我不添加它,CupertinoNavigationBar会与子节点重叠:



我错过了什么?
下面是整个项目和the screen

hwamh0ep

hwamh0ep1#

你只需要在你孩子的小部件上实现“安全区域”小部件(而不是顶部边距),以避免被库比蒂诺导航栏覆盖。

CupertinoPageScaffold(
   navigationBar: CupertinoNavigationBar(),
   child: SafeArea(
            child: [Your widgets] // your children widgets 
        ),
)

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2vuwiymt

2vuwiymt2#

你必须为CupertinoApp设置barBackgroundColor。或者为CupertinoNavigationBar设置backgroundColor也可以解决这个问题。

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return CupertinoApp(
      title: 'Flutter App',
      theme: CupertinoThemeData(
        barBackgroundColor: CupertinoColors.white,
      ),
      home: MyHomePage(title: 'Flutter App'),
    );
  }
}

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CupertinoPageScaffold(
  navigationBar: CupertinoNavigationBar(
    middle: Text('MyStackPageState'),
    backgroundColor: CupertinoColors.white,
  ),
  child: Container(),
}

2nc8po8w

2nc8po8w3#

使用SafeArea将删除CupertinoNavigationBar的半透明效果,使用媒体查询的填充:

CupertinoPageScaffold(
      navigationBar: const CupertinoNavigationBar(
        middle: Text('My App'),
      ),
      child: Builder(
        builder: (context) {
          return Padding(
            padding: EdgeInsets.only(
              top: MediaQuery.of(context).padding.top,
            ),
            child: child,
          );
        },
      ),
    )

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