我试图将TextFormField上的tap事件捕获到flutter Form中。
我使用GestureDetector将TextFormField作为子元素执行,但点击它时没有任何东西触发:
@override
Widget build(BuildContext context) {
return new Scaffold(
key: _scaffoldKey,
appBar: new AppBar(title: const Text('Recherche de sorties')),
body: new DropdownButtonHideUnderline(
child: new Form(
key: _formKey,
autovalidate: _autovalidate,
child: new ListView(
padding: const EdgeInsets.symmetric(horizontal: 16.0),
children: <Widget>[
new DatePicker(
labelText: 'Date',
selectedDate: widget.request.dateDebut,
initialDate: widget.request.dateDebut,
firstDate: new DateTime.now().add(new Duration(days: -1)),
lastDate: new DateTime.now().add(new Duration(days: 365 * 4)),
selectDate: (DateTime value) {
setState(() {
widget.request.dateDebut = value;
});
},
datePickerMode: DatePickerMode.day,
icon: const Icon(Icons.date_range),
),
new InputDecorator(
decoration: const InputDecoration(
labelText: 'Rayon',
hintText: '-- Choisissez un rayon --',
icon: const Icon(Icons.settings_backup_restore),
),
isEmpty: widget.request.rayon == null,
child: new DropdownButton<String>(
value: widget.request.rayon.toString(),
isDense: true,
onChanged: (String newValue) {
setState(() {
widget.request.rayon = int.parse(newValue);
});
},
items: _rayons.keys.map((int key) {
return new DropdownMenuItem<String>(
value: key.toString(),
child: new Text(_rayons[key]),
);
}).toList(),
),
),
new GestureDetector(
onTap: () async {
print("Container clicked");
Prediction p = await showGooglePlacesAutocomplete(
context: context,
apiKey: Consts.googlePlacesApiKey,
mode: Mode.fullscreen,
language: "fr",
components: [new Component(Component.country, "fr")]);
if (p != null) {
(_scaffoldKey.currentState).showSnackBar(
new SnackBar(content: new Text(p.description)));
}
},
child: new TextFormField(
// controller: controller,
decoration: const InputDecoration(
icon: const Icon(Icons.room),
hintText: 'Où êtes vous ?',
labelText: 'Localisation',
),
),
),
new Container(
padding: const EdgeInsets.all(20.0),
alignment: Alignment.center,
child: new Align(
alignment: const Alignment(0.0, -0.2),
child: new ButtonBar(
mainAxisSize: MainAxisSize.min,
children: <Widget>[
new RaisedButton(
child: const Text('ANNULER'),
onPressed: _fermerCritereRecherche,
),
new RaisedButton(
child: const Text('VALIDER'),
onPressed: _valider,
),
],
),
)),
]),
),
),
);
}
如果我更换:
new GestureDetector(
onTap: () async {
print("Container clicked");
Prediction p = await showGooglePlacesAutocomplete(
context: context,
apiKey: Consts.googlePlacesApiKey,
mode: Mode.fullscreen,
language: "fr",
components: [new Component(Component.country, "fr")]);
if (p != null) {
(_scaffoldKey.currentState).showSnackBar(
new SnackBar(content: new Text(p.description)));
}
},
child: new TextFormField(
// controller: controller,
decoration: const InputDecoration(
icon: const Icon(Icons.room),
hintText: 'Où êtes vous ?',
labelText: 'Localisation',
),
),
),
通过一个简单的容器,它正在工作:
new GestureDetector(
onTap: () async {
print("Container clicked");
Prediction p = await showGooglePlacesAutocomplete(
context: context,
apiKey: Consts.googlePlacesApiKey,
mode: Mode.fullscreen,
language: "fr",
components: [new Component(Component.country, "fr")]);
if (p != null) {
(_scaffoldKey.currentState).showSnackBar(
new SnackBar(content: new Text(p.description)));
}
},
child: new Container(
width: 80.0,
height: 80.0,
margin: new EdgeInsets.all(10.0),
color: Colors.black),
),
您有任何想法如何使GestureDetector与TextFormField一起使用吗?也许与控制器,但我尝试没有任何成功,在此先感谢
我通过使用InputDecorator(来自flutter gallery)找到了一个解决方案:
child: new InputDecorator(
decoration: const InputDecoration(
labelText: 'Localisation',
icon: const Icon(Icons.room),
),
child: widget.request.localisationLibelle != null
? new Text(widget.request.localisationLibelle)
: new Text("-- Choisissez un lieu --"),
),
我没有使用TextFormField来捕捉GestureDetector位置的点击,而是使用InputDecorator小部件的简单子Text。
我刚用Flutter 0.6.0解决了这个问题。
GestureDetector对象接受行为属性from this enum以确定如何推迟操作。
GestureDetector的小片段优先于TextFormField:
new GestureDetector(
onTap: onTap,
behavior: HitTestBehavior.opaque,
child: new TextFormField(
enabled: onTap == null,
*other stuff here*
),
)
onTap对象是我在此之外声明的Function对象。我还根据我的onTap对象设置了enabled属性,因此我可以确保如果我想捕获一个tap,则禁用文本表单字段。