本篇想介绍相对小众但颇具使用价值的控件SplitButton,提到SplitButton难免会拿来与ComboBox进行比较,同时在WinUI 3的控件库中,还有一个默默无闻的DropDownButton.更加让人傻傻分不清楚,今天我们就来进行简单的区别和讨论.首先我们看最为常见的ComboBox,核心的用途在于两点.一是节约屏幕空间,二是选中下拉列表的一项内容,其值供后续操作使用.另外ComboBox还可以设置为文本框可编辑,通过TextSubmitted事件获取输入值. <ComboBox…

Ruby学习笔记4: 动态web app的建立 We will first build the Categories page. This page contains topics like Art, Home & Living, and Kids, so our users can browse through categories and find what they like. Each Category in our site will need to store information…

在WPF的时代,我们多是使用ListBox和ListView来展示,纵向滚动条显示的集合数据.这两个控件的默认样式,以及对触控的支持,已完全落后于时代.他们两个分别长这样,和Win10及Win11的风格完全不沾边. 今天我来看下WinUI 3中适用于Desktop App的ListView,我们略过ListBox是因为ListBox使用较为简单,通常用于将少量数据同时显示在页面上.而显示需要滚动条的大量数据,会推荐使用ListView,同时ListView的表现形式也较为丰富.例如分组,拖拽,缩…

ViewPagerIndicator+ViewPager 要想使用ViewPagerIndicator,要使用到viewPagerlibrary开源库 top.xml <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width…

如何在只有一套app设计稿(5s尺寸)切出4和4s尺寸以及安卓系统主流尺寸的图 转自:http://www.zhihu.com/question/23255417   版权归原作者所有 目前ios手机尺寸为320*480px:640*960/1136px:对应的手机型号为iPhone3/3g,iPhone4/4s/5/5s:他们的尺寸关系比为1:2 .android的屏幕众多(分为:idpi 240*320px.mdpi 320*480px.hdpi 480*800px.xhdpi720*128…

var express = require('express'); var path = require('path'); var favicon = require('serve-favicon'); var logger = require('morgan'); var cookieParser = require('cookie-parser'); var bodyParser = require('body-parser'); var routes = require('./routes…

1.首先我们二话不说直接先看报错内容如下: 07-12 08:25:03.572: E/dalvikvm(3602): native fork pid:0 done. 07-12 08:25:03.582: E/dalvikvm(3602): threadid=6: created from interp,name=ReferenceQueueDaemon 07-12 08:25:03.582: E/dalvikvm(3602): threadid=6: calling run(),name=R…

1.首先之间看错误: 07-13 10:07:55.354: E/AndroidRuntime(8008): FATAL EXCEPTION: main 07-13 10:07:55.354: E/AndroidRuntime(8008): java.lang.NullPointerException 07-13 10:07:55.354: E/AndroidRuntime(8008): at com.himi.clock.AlarmActivity.onClick(AlarmActivity.…

We first built a static site which displayed a static image using only a Controller and a View. This is our Etsy landing page page. Then we built the Categories page, with a Model (manages data), Controller (manages decisions) and View (manages displ…

上一节里,我们搭建了一个数据库的结构,并用index验证了request-response cycle,如下图: 1. Add show method into Controller 这一节,我们要继续丰富我们的controller: While index gave all categories, show allows us to access one category. This this is helpful when we want to show just one Category…