在这个例子中,我们使用了GlobalKey来访问MyCustomWidget的RenderBox,并在initState方法中通过WidgetsBinding.instance.addPostFrameCallback来在布局完成后获取Widget的高度。获取到的高度被存储在widgetHeight变量中,并在UI中显示出来。 确保获取的高度值是准确且有效的: 由于Flutter的布局系统是基于约束的,所以确保在布局完成...
普通widget 可以使用 _globalKey.currentContext.size.height 直接获取,如果获取CustomScrollView slivers 子元素的高度 可以使用 final listHeight = listGlobalKey.currentContext.findRenderObject().semanticBounds.size.height; 以下范例 import 'package:flutter/material.dart'; class WidgetHeight extends StatefulWidget {...
参考github上getwidget-app-kit import'package:flutter/material.dart'; import'package:getwidget/getwidget.dart'; import'package:flutter/cupertino.dart';classBottomLabelTab extends StatefulWidget { @override _BottomLabelTabState createState()=>_BottomLabelTabState(); }class_BottomLabelTabState extends Sta...
import'package:flutter/material.dart';classGetWidgetWidthAndHeigetextendsStatelessWidget{@overrideWidget build(BuildContext context) {finalsize =MediaQuery.of(context).size;finalwidth =size.width;finalheight =size.height;print('width is$width; height is$height');returnMaterialApp( home: Scaffold( appBar...
一般情况下,我们会使用如下方式去获取 widget 的宽高: finalsize=MediaQuery.of(context).size;finalwidth=size.width;finalheight=size.height;复制代码 但是如果不注意,这种写法很容易报错,例如下面的写法就会报错: import'package:flutter/material.dart';classGetWidgetWidthAndHeigetextendsStatelessWidget{@overrideWidget...
Flutter中获取设备的宽度和高度 Flutter中获取设备的宽度和高度的方法如下 Widgetbuild(BuildContextcontext){// ScreenUtil.instance = ScreenUtil(width: 750, height: 1334)..init(context);finalsize=MediaQuery.of(context).size;finalwidth=size.width;finalheight=size.height;}...
I've written the following function in which I pass GlobalKey that I assigned to a widget, and I'm storing the returned height in an array called 'heightsList'. But for some reason I'm getting a wrong height, which is 65( which is same f...
一般情况下,我们会使用如下方式去获取 widget 的宽高: finalsize =MediaQuery.of(context).size;finalwidth =size.width;finalheight =size.height; AI代码助手复制代码 但是如果不注意,这种写法很容易报错,例如下面的写法就会报错: import'package:flutter/material.dart';classGetWidgetWidthAndHeigetextendsStatelessWidge...
GetView的使用方法非常简单,只是要将你的视图层继承自GetView并传入需要注册的控制器并Get.put()即可,我们来看下代码演示: 第一步:应用程序入口配置 import 'package:flutter/material.dart'; import 'package:flutter_getx_example/GetViewAndGetWidgetExample/GetViewAndGetWidgetExample.dart'; ...
} int totalHeight = 0; for (int i = 0; i < listAdapter.getCount(); i++) ...