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按键,在flutter 中,有很多已经内置的button,合理的利用可以快速的开发,
但是ElevatedButton中,有一个Buttonstyle,配合起来可以创建自己需要的按钮样式,但是其实个人感觉运用起来有些复杂。
在一个app 中,肯定会出现按键widget的,这个也是运用很多的情况。
参数 | 说明 |
---|---|
super.key | key |
required super.onPressed | 点击函数 |
super.onLongPress | 长按的处理 |
super.onHover | 鼠标悬停的时候处理的时间 |
super.onFocusChange | 焦点改变 |
super.style | buttonstyle |
super.focusNode | – |
super.autofocus = false, | – |
super.clipBehavior = Clip.none | 抗锯齿功能 |
super.statesController | 可以监听和控制按钮的状态改变,然后做处理 |
required super.child | widget |
代码如下(示例):
ElevatedButton(
onPressed: () {},
child: const Text('ElevatedButton'),
鼠标悬停在按钮上面就改变颜色
ElevatedButton(
onPressed: () {
debugPrint("I AM CLICK HERE");
},
onLongPress: () {
debugPrint('I AM LONGPRESS');
},
//按钮的状态控制器,少用到
// statesController: ,
//抗锯齿功能
clipBehavior: Clip.antiAlias,
//焦点处理,使用不多
focusNode: FocusNode(),
//鼠标悬停的处理,一般在win 和mac的软件的时候处理
onHover: (inhover) {
if (inhover) {
_color = Colors.green;
} else {
_color = Colors.red;
}
setState(() {});
},
child: Text(
'ElevatedButton',
style: TextStyle(color: _color),
),
)
参数 | 说明 |
---|---|
this.textStyle | 文本样式 |
this.backgroundColor | 背景颜色 |
this.foregroundColor | |
this.overlayColor | |
this.shadowColor | |
this.surfaceTintColor | |
this.elevation | |
this.padding | |
this.minimumSize | |
this.fixedSize | |
this.maximumSize | |
this.side | |
this.shape | |
this.mouseCursor | |
this.visualDensity | |
this.tapTargetSize | |
this.animationDuration | |
this.enableFeedback | |
this.alignment | |
this.splashFactory |
【Flutter】shape 属性 ShapeBorder,形状
ElevatedButton(
onPressed: () {
debugPrint("I AM CLICK HERE");
},
onLongPress: () {
debugPrint('I AM LONGPRESS');
},
//按钮的状态控制器,少用到
// statesController: ,
//抗锯齿功能
clipBehavior: Clip.antiAlias,
//焦点处理,使用不多
focusNode: FocusNode(),
style: ButtonStyle(
//背景颜色
backgroundColor: MaterialStateProperty.all(Colors.indigo),
//字体颜色
foregroundColor: MaterialStateProperty.all(Colors.white),
// 鼠标悬停的时候背景颜色
overlayColor: MaterialStateProperty.all(Colors.red),
//影音的颜色
shadowColor: MaterialStateProperty.all(Colors.yellow),
//表面颜色
surfaceTintColor: MaterialStateProperty.all(Colors.pink),
// 阴影值
elevation: MaterialStateProperty.all(10),
//内边距,文本同按钮边框的距离
// padding: MaterialStateProperty.all(const EdgeInsets.all(5)),
//最小值,尺寸不能再小于这个了
// minimumSize: MaterialStateProperty.all(const Size(10, 10)),
//边框的颜色和厚度
side: MaterialStateProperty.all(
const BorderSide(color: Colors.pink, width: 1.0)),
//形状
shape: MaterialStateProperty.all(
const BeveledRectangleBorder(
borderRadius: BorderRadius.all(Radius.circular(15)),
side: BorderSide(color: Colors.green, width: 1)),
),
//鼠标的样式,当悬停的时候,鼠标要显示为什么样的样式,比如下面的鼠标就会显示为等待加载的样式
mouseCursor:
MaterialStateProperty.all(SystemMouseCursors.wait),
//视觉密度,就是按钮的紧凑性
visualDensity: VisualDensity.compact,
//触控区域,少用
tapTargetSize: MaterialTapTargetSize.padded,
//shap,eleation 改变的动画时间
animationDuration: const Duration(seconds: 1),
//检测到的手势是否应提供声学和/或触觉反馈。例如,在Android上,当启用反馈时,轻敲会产生咔哒声,长按会产生短暂的振动。
enableFeedback: true,
//child的位置,
alignment: Alignment.center,
//水波纹
splashFactory: InkRipple.splashFactory,
//字体样式
textStyle: MaterialStateProperty.all(
const TextStyle(fontWeight: FontWeight.bold))),
child: const Text(
'ElevatedButton',
),
)
带图标的按键:buttonstyle 同上面的说明是一样的;
isSelected: isSelect,//需要在themedata 里面设置useMaterial3: true
IconButton(
icon: const Icon(Icons.arrow_drop_down),
isSelected: isSelect,//需要在themedata 里面设置useMaterial3: true
selectedIcon: const Icon(Icons.arrow_drop_up),
onPressed: () {
isSelect = !isSelect;
setState(() {});
},
),
IconButton(
onPressed: () {
print("Pressed");
setState(() {});
},
// splashRadius: 0.2,
splashColor: Colors.red,
focusColor: Colors.indigo,
hoverColor: Colors.yellow,
highlightColor: Colors.purple,
disabledColor: Colors.teal,
// mouseCursor: SystemMouseCursors.allScroll,
//尺寸限制
// constraints:BoxConstraints() ,
tooltip: 'this is a iconbutton',
isSelected: true,
selectedIcon: Icon(Icons.favorite),
icon: Icon(Icons.adb_sharp))
ElevatedButton(
onPressed: () {},
style: ButtonStyle(
backgroundColor: MaterialStateProperty.all(Colors.teal),
shadowColor: MaterialStateProperty.all(Colors.yellowAccent),
elevation: MaterialStateProperty.all(10)),
child: const Text(
'开始',
style: TextStyle(color: Colors.white),
)),
ElevatedButton(
onPressed: () {},
clipBehavior: Clip.antiAlias,
style: ButtonStyle(
shape: MaterialStateProperty.all(const CircleBorder(
side: BorderSide(width: 1, color: Colors.pink))),
padding:
MaterialStateProperty.all(const EdgeInsets.all(10)),
overlayColor: MaterialStateProperty.all(Colors.white),
foregroundColor: MaterialStateProperty.all(Colors.black),
backgroundColor:
MaterialStateProperty.all(Colors.indigoAccent),
shadowColor: MaterialStateProperty.all(Colors.blueAccent),
elevation: MaterialStateProperty.all(10)),
child: const Text(
'登陆',
)),
ElevatedButton(
onPressed: () {},
style: ButtonStyle(
minimumSize: MaterialStateProperty.all(
Size(MediaQuery.of(context).size.width, 40)),
foregroundColor: MaterialStateProperty.all(Colors.black),
backgroundColor: MaterialStateProperty.all(Colors.purple),
shadowColor: MaterialStateProperty.all(Colors.blueAccent),
elevation: MaterialStateProperty.all(10)),
child: const Text(
'登陆',
)),
ElevatedButton(
onPressed: () {},
style: ButtonStyle(
shape: MaterialStateProperty.all(
const BeveledRectangleBorder(
borderRadius: BorderRadius.all(Radius.circular(15)),
side: BorderSide(color: Colors.green, width: 1))),
minimumSize: MaterialStateProperty.all(
Size(MediaQuery.of(context).size.width, 40)),
foregroundColor: MaterialStateProperty.all(Colors.black),
backgroundColor: MaterialStateProperty.all(Colors.pink),
shadowColor: MaterialStateProperty.all(Colors.blueAccent),
elevation: MaterialStateProperty.all(10)),
child: const Text(
'登陆',
)),
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