Question

我正在尝试创建一个类，如果您单击一个按钮，该类将会增加，然后再次单击将其缩小。但动画不起作用

这就是我所拥有的

import 'package:flutter/material.dart';
import 'package:flutter_button_collection/flutter_button_collection.dart';

class AnimatedShadowButton extends StatefulWidget {
  final double height;
  final double width;
  final double finalHeight;
  final double finalWidth;

  const AnimatedShadowButton(
      {Key key, this.height, this.width, this.finalHeight, this.finalWidth})
      : assert(height < finalHeight),
        assert(width < finalWidth),
        super(key: key);

  @override
  _AnimatedShadowButtonState createState() => _AnimatedShadowButtonState();
}

class _AnimatedShadowButtonState extends State<AnimatedShadowButton> {
  double buttonHeight;
  double buttonWidth;

  void aniButo() {
    setState(() {
      buttonHeight = widget.height <= widget.finalHeight
          ? widget.finalHeight
          : widget.height;
      buttonWidth =
          widget.width <= widget.finalWidth ? widget.finalWidth : widget.width;
    });
  }

  Widget build(BuildContext context) {
    return AnimatedContainer(
      duration: Duration(milliseconds: 300),
      curve: Curves.easeInBack,
      width: buttonWidth,
      height: buttonHeight,
      child: AVLButton(
        onPressed: () {
          aniButo();
        },
        child: Text("This is a text"),
        elevation: 30.0,
      ),
    );
  }
}

如果我提供了buttonHeight和buttonWidth的值，并且一切都是静态的，那么它可以工作，但是我希望能够像这样使用它

AnimatedShadowButton(
              height: 60.0,
              width: 100.0,
              finalHeight: 90.0,
              finalWidth: 150.0,
            ),

Answer 1

我认为您必须更改Private Sub SimpleButton1_Click(sender As Object, e As EventArgs) Handles SimpleButton1.Click Try If Not qry.Contains("JOIN") Then Dim builder As New OleDbCommandBuilder(adpt) adpt.SelectCommand = New OleDbCommand(qry, con) adpt.UpdateCommand = builder.GetUpdateCommand() adpt.Update(dataTable) Else 'TODO : Update GridView Without using QueryBuilder(Dynamically) End If Catch ex As Exception End Try con.Close() End Sub方法。像这样：

aniButo

UPD

在void aniButo() { setState(() { buttonHeight = buttonHeight == widget.height ? widget.finalHeight : widget.height; buttonWidth = buttonWidth == widget.width ? widget.finalWidth : widget.width; }); }内添加_AnimatedShadowButtonState方法

initState

AnimatedContainer Button类未设置动画

1 个答案: