transition

[XState] Conditionally Transition to States with Guards in XState

由 ぃ、小莉子 提交于 2020-01-19 23:36:45
Not all transitions should be taken immediately. Occasionally, we would like to conditionally take a transition. We do this through the use of "guards". A "guard" is a predicate function (a function that returns a boolean) that is set on a transition object's cond property (short for "conditional"). When an event is sent to the machine and it encounters a transition object with a cond property set to a guard function, it will call that function with the current context and event object. If the guard returns true , the transition will be taken, otherwise, it will attempt the next transition for

Looping Animation of text color change using CSS3

由 半世苍凉 提交于 2020-01-19 09:50:50
问题 I have text that I want to animate. Not on hover, for example but continually changing slowly from white to red and then back to white again. Here is my CSS code so far: #countText{ color: #eeeeee; font-family: "League Gothic", Impact, sans-serif; line-height: 0.9em; letter-spacing: 0.02em; text-transform: uppercase; text-shadow: 0px 0px 6px ; font-size: 210px; } 回答1: Use keyframes and animation property HTML <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Qui ad quos autem

Looping Animation of text color change using CSS3

由 前提是你 提交于 2020-01-19 09:49:47
问题 I have text that I want to animate. Not on hover, for example but continually changing slowly from white to red and then back to white again. Here is my CSS code so far: #countText{ color: #eeeeee; font-family: "League Gothic", Impact, sans-serif; line-height: 0.9em; letter-spacing: 0.02em; text-transform: uppercase; text-shadow: 0px 0px 6px ; font-size: 210px; } 回答1: Use keyframes and animation property HTML <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Qui ad quos autem

CSS3之过渡Transition

由 时光怂恿深爱的人放手 提交于 2020-01-19 03:31:01
CSS3也有着非常强大的属性，那就是过渡——Transition。过渡——Transition在W3C的描述：“css的transition允许css的属性值在一定 的时间区间内平滑地过渡。这种效果可以在鼠标单击、获得焦点、被点击或对元素任何改变中触发，并圆滑地以动画效果改变CSS的属性值。 ”既然CSS3的过渡这么强大，下面我们就一点一点掌握它吧。 　　CSS3中的过渡Transition有四个中心属性：transition-property、transition-duration、transition-delay和transition-timing- function。 　　一、transition-property——指定要运动的样式 　　1、transition-property的语法 [css] transition-property :all(所有属性改变) || [attr] (指定要运动的样式)|| none(没有属性改变) 　　2、transition-property的属性值 　　(1)none：transition马上停止执行 　　(2)all：元素产生任何属性值变化时都将执行transition效果 　　(3)attr：指定要运动的样式 　　二、transition-duration 　　transition-duration是指定元素转换过程的持续时间

[Robot] To transition to a succeeded state, the goal must be in a preempting or active state...

由 天涯浪子 提交于 2020-01-19 03:10:03
记录 错误： To transition to a succeeded state, the goal must be in a preempting or active state, it is currently in state: 2 原因：不能在抢占回调后server端仍然发送setSucceeded()，因为抢占后便放弃了之前的执行，错在此处 server . setSucceeded ( ) ; 解决：加入一个bool变量标识符在执行函数中，解决抢断的逻辑问题 执行函数修改如下 void ExecuteCb ( const franka_msgs :: PickGoalConstPtr & goal ) { action_ = true ; //为保证标识符有效且不影响正常运行，应进入执行函数时便设置为true . . . //(此处为代码块省略) if ( action_ ) { server . setSucceeded ( ) ; } } 抢断函数修改如下： void preemptCb ( ) { //会自动执行第一个目标再执行第二个。; ROS_INFO_STREAM ( "into preemptCB ..." ) ; action_ = false ; //此处告知：我抢断了，就别发succeed了 group_ - > stop ( ) ; server

Vue动画简述

由 浪子不回头ぞ 提交于 2020-01-18 20:30:28
概述 Vue 中可以使用 <transition> 和 <transition-group> 标签来定义元素的过渡或动画效果 二者最大的区别是，在使用 v-for 循环时，必须使用 <transition-group> 标签。其他时候使用 <transition> 1.css类名 你可以在 CSS 中使用过渡类名来定义，过渡的效果 .v-enter ：过渡开始前的状态 .v-enter-active ：开始过渡中的状态，多为定义时间，延迟和速率函数 .v-enter-to ：过渡之后的状态 .v-leave ：离开之前的状态 .v-leave-active ：离开过渡中的状态，多为定义时间，延迟和速率函数 .v-leave-to ：离开之后的状态 以上的类名都对 <transition> 和 <transition-group> 生效 直接在 CSS 定义即可 //CSS . v - enter { } . v - enter - active { } . v - enter - to { } . v - leave { } . v - leave - active { } . v - leave - to { } //HTML < transition > //使用时直接包裹想要过渡的元素外即可 < li > < / li > < / transition > 还可以使用行内

Django测试平台开发（二）开发博客

由 ╄→尐↘猪︶ㄣ 提交于 2020-01-17 22:08:18
Django 测试平台开发（二）开发博客 1、加载博客HTML页面 1、在templates目录下新建index.html文件 1 <!doctype html> 2 <html> 3 <head> 4 <meta charset="utf-8"> 5 <title>首页_杨青个人博客 - 一个站在web前端设计之路的女技术员个人博客网站</title> 6 <meta name="keywords" content="个人博客,杨青个人博客,个人博客模板,杨青" /> 7 <meta name="description" content="杨青个人博客，是一个站在web前端设计之路的女程序员个人网站，提供个人博客模板免费资源下载的个人原创网站。" /> 8 <meta name="viewport" content="width=device-width, initial-scale=1.0"> 9 <link href="/static/css/base.css" rel="stylesheet"> 10 <link href="/static/css/index.css" rel="stylesheet"> 11 <link href="/static/css/m.css" rel="stylesheet"> 12 <script src="/static/js/jquery

Subviews not displaying during Flip Transition

由 让人想犯罪 __ 提交于 2020-01-17 10:43:10
问题 I am doing a flip transition between two subviews of a container view. The container view is NOT fullscreen and is not the root view of the view controller (it is a subview thereof, taking roughly the bottom third of the screen). Of the two child views being switched in the flip transition (both of them UIImageView), one of them has two children in turn (again, of UIImageView type). This subview is the one that "goes away" as a result of the transition. As soon as the transition starts, the

Subviews not displaying during Flip Transition

由 僤鯓⒐⒋嵵緔 提交于 2020-01-17 10:42:50
问题 I am doing a flip transition between two subviews of a container view. The container view is NOT fullscreen and is not the root view of the view controller (it is a subview thereof, taking roughly the bottom third of the screen). Of the two child views being switched in the flip transition (both of them UIImageView), one of them has two children in turn (again, of UIImageView type). This subview is the one that "goes away" as a result of the transition. As soon as the transition starts, the

vue学习笔记（二）

由 爱⌒轻易说出口 提交于 2020-01-17 09:05:47
一、vue生命周期 vue实例从创建到销毁的过程，称为生命周期，共有八个阶段。 这八个阶段里分别有一个叫做钩子函数的实例选项。供用户在相应的阶段对其进行操作。 beforeCreate(){ //组件实例刚刚创建，还未进行数据观测和事件配置 }, created(){ //实例已经创建完成，并且已经进行数据观测和事件配置 }, beforeMount(){//模板编译之前，还没挂载 }, mounted(){ //模板编译之后，已经挂载，此时才会渲染页面，才能看到页面上数据的展示 }, beforeUpdate(){//组件更新之前 }, updated(){//组件更新之后 }, beforeDestroy(){//组件销毁之前 }, destroyed(){ //组件销毁之后 } 这几个钩子中，最常用的是 created() 与 mounted() 。 二、计算属性 计算属性也是用来存储数据，但具有以下几个特点： 数据可以进行逻辑处理操作 对计算属性中的数据进行监视 1、基本用法 <div id="app"> {{addZero}} </div> new Vue({ el: '#app', data: { num: 8 }, computed: { //这是计算属性的get方法，用于取值 addZero() { return this.num > 10 ? this.num :
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