fullter常用方法

1. 获取屏幕的宽高  和状态栏高度

double width&＃61;MediaQuery.of(context).size.widthMediaQuery.of(context).padding.top

2. 组件跳转

import &＃39;package:flutter/cupertino.dart&＃39;;Navigator.of(content).push(new CupertinoPageRoute(builder: (content)&＃61;>new EventWidget()),);

3.  Container 水平居中

new Align(child: new Container(width: 50.0,height: 50.0,color: Colors.blueAccent,child: new Text(&＃39;&＃39;),),

4. 菊花加载中 

return new Container(color: new Color.fromRGBO(244, 245, 245, 1.0),child: new CupertinoActivityIndicator(animating: false,),
);

5. 定时器 

import &＃39;dart:async&＃39;;

Timer.periodic(const Duration(microseconds: 500),(time){print(time);
});
Timer(Duration(microseconds: 500), (){print(_ScrollController.position.maxScrollExtent);_ScrollController.jumpTo(_ScrollController.position.maxScrollExtent&＃43;150.0);
});

6. appBar 高度

appBar:PreferredSize(child:new AppBar(backgroundColor: Color.fromRGBO(251, 114, 153, 1.0),title: new Align(child: new Text(&＃39;分类&＃39;,style: new TextStyle(color: Colors.white,),),),actions: [new IconButton(icon: new Icon(Icons.file_download,color: Colors.white,),onPressed: null),new IconButton(icon: new Icon(Icons.sms,color: Colors.white,),onPressed: null)],leading: new FlatButton(onPressed: null,child: new Icon(Icons.menu,color: Colors.white,)),
) , preferredSize: Size.fromHeight(48.0)), //设置高度

7. pop 返回 监听

&＃64;overridevoid didChangeDependencies() { //会监听Navigator.of(context).pop// TODO: implement didChangeDependenciessuper.didChangeDependencies();print("didChangeDependencies");
}