[英]How to override Widget function in flutter
我有这个小部件功能:
static Widget mainButton(String title){
return MaterialButton(
textColor: Colors.white,
splashColor: Colors.white54,
elevation: 8.0,
child: Container(
width: 244,
height: 66,
decoration: BoxDecoration(
image: DecorationImage(
image: AssetImage('assets/images/home_button_bg.png'),
fit: BoxFit.cover),
),
child: Center(
child: Text(
title,
style: TextStyle(
fontSize: 20.0,
),
),
),
),
onPressed: (){
print('pressed');
},
);
}
我想写onPressed()
我想打电话给每次不同的功能mainButton()
函数。 我该怎么写?
Widget mainButton(String title, VoidCallback onPressed){
return MaterialButton(
textColor: Colors.white,
splashColor: Colors.white54,
elevation: 8.0,
child: Container(
width: 244,
height: 66,
decoration: BoxDecoration(
image: DecorationImage(
image: AssetImage('assets/images/home_button_bg.png'),
fit: BoxFit.cover),
),
child: Center(
child: Text(
title,
style: TextStyle(
fontSize: 20.0,
),
),
),
),
onPressed: onPressed,
);
}
例子 :
mainButton("Test", () {
print('Test');
});
您可以使用 Function 输入此方法,如以下代码:
static Widget mainButton(String title, Function function) {
return MaterialButton(
textColor: Colors.white,
splashColor: Colors.white54,
elevation: 8.0,
child: Container(
width: 244,
height: 66,
decoration: BoxDecoration(
image: DecorationImage(
image: AssetImage('assets/images/home_button_bg.png'),
fit: BoxFit.cover),
),
child: Center(
child: Text(
title,
style: TextStyle(
fontSize: 20.0,
),
),
),
),
onPressed: function);
}
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