1、普通用法
floatingActionButton: FloatingActionButton(
child: Icon(Icons.add),
onPressed: (){
print('不要啊~');
},
),
2、修改悬浮按钮位置
继承FloatingActionButtonLocation类，重写对应方法自定义位置
import 'package:flutter/material.dart';
class CustomFloatingActionButtonLocation extends FloatingActionButtonLocation {
FloatingActionButtonLocation location;
double offsetX; // X方向的偏移量
double offsetY; // Y方向的偏移量
CustomFloatingActionButtonLocation(this.location, this.offsetX, this.offsetY);
@override
Offset getOffset(ScaffoldPrelayoutGeometry scaffoldGeometry) {
Offset offset = location.getOffset(scaffoldGeometry);
return Offset(offset.dx offsetX, offset.dy offsetY);
}
}
使用
floatingActionButtonLocation:CustomFloatingActionButtonLocation(
FloatingActionButtonLocation.endFloat, 0, -DpUtils.setWidth(20)),
3、修改悬浮按钮大小
floatingActionButton: SizedBox(
height: 100.0,
width: 100.0,
child:FloatingActionButton(
child: Icon(Icons.add),
onPressed: () {},
),
),
4、去除悬浮按钮切换动画
继承FloatingActionButtonAnimator类并重写对应的方法
import 'package:flutter/material.dart';
class NoScalingAnimation extends FloatingActionButtonAnimator{
double _x;
double _y;
@override
Offset getOffset({Offset begin, Offset end, double progress}) {
_x = begin.dx (end.dx - begin.dx)*progress ;
_y = begin.dy (end.dy - begin.dy)*progress;
return Offset(_x,_y);
}
@override
Animation<double> getRotationAnimation({Animation<double> parent}) {
return Tween<double>(begin: 1.0, end: 1.0).animate(parent);
}
@override
Animation<double> getScaleAnimation({Animation<double> parent}) {
return Tween<double>(begin: 1.0, end: 1.0).animate(parent);
}
}
使用
floatingActionButtonAnimator: NoScalingAnimation(),
5、一般的自定义悬浮按钮样式
@override
Widget build(BuildContext context) {
return Scaffold(
floatingActionButton: FloatingActionButton(
child: Container(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.center,
children: <Widget>[
Image.asset(
"images/float_button.png",
width: DpUtils.setWidth(32),
height: DpUtils.setWidth(32),
),
Text(
"悬浮按钮",
style: TextStyle(fontWeight: FontWeight.bold,
fontSize: DpUtils.setSp(20), color: Colors.white),
),
],
),
),
elevation: 0,
onPressed: () {
_doSome();
},
backgroundColor: Colors.black,
heroTag: "floatHome",
),
)
)}
6、彻底的自定义悬浮按钮样式
其实，floatingActionButton 可以直接传入普通的widget。所以该干嘛干嘛咯
@override
Widget build(BuildContext context) {
return Scaffold(
floatingActionButton: Container(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.center,
children: <Widget>[
Image.asset(
"images/home_icon_publishing.png",
width: DpUtils.setWidth(32),
height: DpUtils.setWidth(32),
),
Text(
"发主题",
style: TextStyle(fontWeight: FontWeight.bold,
fontSize: DpUtils.setSp(20), color: Colors.white),
),
],
),
),
);
}
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