![](/img/trans.png)
[英]Flutter mainaxisAlignment.spaceEvenly not working on multiple flex(Row & Column)
[英]MainAxisAlignment.spaceEvenly not working
我試圖對齊按鈕,這是結果。 我正在嘗試使用MainAxisAlignment.SpaceEvenly來獲得3個按鈕(向左,向下,向右)均勻地間隔,但是一些如何仍然保持在一起。 有人可以為我指出這背后的問題以及如何達到我想要的結果嗎?
new Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: <Widget>[
// 4 Buttons on left side
new Column(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: <Widget>[
// Up button
new Row(
children: <Widget>[
MovingButton(
name: new Text("Up"),
channel: this.channel,
),
],
),
// 3 buttons that stick and needed to be space evenly
new Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: <Widget>[
MovingButton(
name: new Text("Left"),
channel: this.channel,
),
MovingButton(
name: new Text("Down"),
channel: this.channel,
),
MovingButton(
name: new Text("Right"),
channel: this.channel,
),
],
),
],
),
// attack button
new Column(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: <Widget>[
MovingButton(
name: new Text("Attack"),
channel: this.channel,
),
],
),
],
),
將您按鈕的子窗口小部件行放入容器中,這在類似情況下對我有用
好吧,如果我確實了解您的需求,那么您可以有多種選擇。
您可以在外部行中擴展第一列,但是這樣可以使第二列都在右側(我猜這里需要一些填充)。
new Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: <Widget>[
// 4 Buttons on left side
Expanded(
child: new Column(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: <Widget>[
// Up button
new Row(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
RaisedButton(
child: new Text("Up"),
),
],
),
// 3 buttons that stick and needed to be space evenly
new Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: <Widget>[
RaisedButton(
child: new Text("left"),
),
RaisedButton(
child: new Text("Down"),
),
RaisedButton(child: new Text("Right")),
],
),
],
),
),
// attack button
new Column(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: <Widget>[
RaisedButton(child: new Text("Attack")),
],
),
],
),
我建議您使用Flutter Outline
面板來了解渲染樹的線索。
這是您的實際情況,而沒有擴展第一列:
或者,您可以簡單地在按鈕上添加padding
(使用RaiseButton
而不是自定義的MovingButton進行測試,但是可以使用MovingButton
代替)
new Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: <Widget>[
// 4 Buttons on left side
new Column(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: <Widget>[
// Up button
new Row(
children: <Widget>[
RaisedButton(
child: new Text("Up"),
),
],
),
// 3 buttons that stick and needed to be space evenly
new Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: <Widget>[
Padding(
padding: const EdgeInsets.symmetric(vertical: 0, horizontal: 2),
child: RaisedButton(
child: new Text("left"),
),
),
Padding(
padding: const EdgeInsets.symmetric(vertical: 0, horizontal: 2),
child: RaisedButton(
child: new Text("Down"),
),
),
Padding(
padding: const EdgeInsets.symmetric(vertical: 0, horizontal: 2),
child: RaisedButton(
child: new Text("Right")
),
),
],
),
],
),
// attack button
new Column(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: <Widget>[
RaisedButton(
child: new Text("Attack")
),
],
),
],
),
或使用ButtonBar
代替Row
小部件,並為所有按鈕添加主題 。
new Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: <Widget>[
// 4 Buttons on left side
new Column(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: <Widget>[
// Up button
new Row(
children: <Widget>[
RaisedButton(
child: new Text("Up"),
),
],
),
// 3 buttons that stick and needed to be space evenly
new ButtonTheme(
padding: EdgeInsets.symmetric(vertical: 0, horizontal: 8),
child: new ButtonBar(
children: <Widget>[
RaisedButton(
child: new Text("left"),
),
RaisedButton(
child: new Text("Down"),
),
RaisedButton(
child: new Text("Right")
),
],
),
),
],
),
// attack button
new Column(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: <Widget>[
RaisedButton(
child: new Text("Attack")
),
],
),
],
),
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.