Unity_UIWidgets学习笔记03_组件_Container

迈不过友情╰ 2021-12-18 06:31 352阅读 0赞

1、源码

public Container(
                Key key = null,//唯一标识符
                Alignment alignment = null,//子元素的排列方式
                EdgeInsets padding = null,//内边距
                Color color = null,//颜色,
                Decoration decoration = null,//绘制在child后面的装饰，设置了decoration的话，就不能设置color属性，否则会报错，此时应该在decoration中进行颜色的设置。
                Decoration forgroundDecoration = null,//绘制在child前面的装饰。
                float? width = null,//container的宽度
                float? height = null,//container的高度
                BoxConstraints constraints = null,//添加到child上额外的约束条件
                EdgeInsets margin = null,//外边距
                Matrix3 transfrom = null,//变换矩阵
                Widget child = null//子元素
            )

2、例子

new Container(
               constraints:BoxConstraints.expand(
                height:Theme.of(context).textTheme.display1.fontSize*1.1f+200f
            ),
               decoration:new BoxDecoration(
                   border: Border.all(width: 2.0f, color: Colors.red),
                   color: Colors.grey,
                   borderRadius: BorderRadius.all(Radius.circular(20.0f)),
                   image:new DecorationImage(
                       image:new NetworkImage(@"https://hbimg.huabanimg.com/437658f08a68e1d24ea512b48b4a8cb7d808f3de25148-uBjU7Q_fw658"),
                       centerSlice: Unity.UIWidgets.ui.Rect.fromLTRB(270.0f, 180.0f, 1360.0f, 730.0f)
                   )
                   
    
               ),
               alignment:Alignment.center,
               padding:EdgeInsets.all(8),
                   margin:EdgeInsets.all(10f),
                //    color:Colors.green,
                   child:new Text(
                        "Hello World",
                        style:Theme.of(context)
                                    .textTheme
                                    .display1
                                    .copyWith(color:Colors.black)
            
                     ),
                     transfrom:Matrix3.makeRotate(0.3f)
            );

![1086068-20190630003833931-482907915.png][]

3，简单使用

按钮的状态（正常态、点击态）的颜色变化；

new GestureDetector(
               child:new Container(
                    constraints:BoxConstraints.expand(
                        height:Theme.of(context).textTheme.display1.fontSize*1.1f+200f
                    ),
                    decoration:new BoxDecoration(
                        border: Border.all(width: 2.0f, color: Colors.red),
                        color: btnColor,
                        borderRadius: BorderRadius.all(Radius.circular(80.0f))
                    ),
                    alignment:Alignment.center,
                    padding:EdgeInsets.all(20),
                        margin:EdgeInsets.only(top:350),
                        //    color:Colors.green,
                        child:new Text(
                                "按钮",
                                style:Theme.of(context)
                                            .textTheme
                                            .display1
                                            .copyWith(color:Colors.black)
                    
                            )
                     
            ),
            onTapDown:(x)=>
            {
                setState(()=>{
                    btnColor=Colors.blue;
                });
            },
            onTapUp:(x)=>{
                setState(()=>{
                    btnColor=Colors.grey;
                });
            }
               )
           ;

![1086068-20190630005758770-914675047.gif][]

转载于:https://www.cnblogs.com/PandaHome/p/11108439.html

[1086068-20190630003833931-482907915.png]: /images/20211218/042459cbd75e4016869342455712f29c.png
[1086068-20190630005758770-914675047.gif]: /images/20211218/7943fcf52ae847ea9759929de9db73aa.png