position | 易学教程

vue 图片滑动登录

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前言最近在研究图片滑动解锁登录，说是要用阿里的那个验证，但是还是想自己手写下这个Demo 效果图是这样的：本来是想用canvas 来实现的，但是类，后来还想用css 和图片来代替canvas 其实思路就这样的：那个缺陷的滑块位置是随机的根据图片的宽高产生随机数当然是定位： left，top.,然后距离最左边的距离 moveToLeft，最后滑动的距离和这个距离作比较，看看是否相等。。然后就好了...... vue 中滑动开始 start 开始计算时间 - 》想右滑动的距离等于滑块滑动的距离思路其实也不难，就放上代码吧： <template> <section class="code_bg"> <div class="slide-box"> <div class="slide-img-block"> <div class="slide-img-div"> <div class="slide-img-nopadding"> <img class="slide-img" id="slideImg" :src="img"> <div class="slide-block" id="slideBlock"></div> <div class="slide-box-shadow" id="cutBlock"></div> </div> </div> </div>

Is this possible to achieve absolute position functionality without using position attribute through css?

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I am creating outlook email. I have created an email system. I have check in all email giants like Gmail, yahoo etc it work perfectly but suddenly when I saw same email in outlook it was shocking that outlook not supports position attribute. Now, what I want is to achieve same functionality, I have searched on Google but not found a good source to solve issue except this platform to ask question. Please help! Thanks in advance. Note: I don’t want to do this by placing one div inside other. This not suits my application at all i want things to positioned with respect to corners (width/height).

美观的PHP跳转页面代码

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代码简介代码来源无意中浏览她辰博客也就是现在的SKin博客 go跳转代码感觉很不错页面 F12搞下来了分享给需要跳转的人使用这里我说下第8行代码 11代表是跳转的秒数网址代表是要跳转的网址哦代码如下 <html> <head> <meta http-equiv = "Content-Type" content = "text/html; charset=UTF-8" > <meta charset = "UTF-8" > <meta http-equiv = "X-UA-Compatible" content = "IE=edge" > <meta name = "renderer" content = "webkit" > <meta name = "viewport" content = "width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no" > <meta http-equiv = "refresh" content = "11;url='http://www.tx47.cn';" > <title> 页面加载中,请稍候... </title> </head> <body> <div class = 'center-box'

How to position element below relative positioned element without overlapping?

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If I put anything after element with relative+absolute positioned elements, it overlaps. It does not do this if I specify height, but I do not want to do this as content of relatively positioned element is dynamic. How to get rid of overlapping without specifying height? Simple example: <div style="position:relative"> <div style="position:absolute;"> blabla </div> </div> I WANT THIS BELOW absolute positioning takes the element out of the flow of the structure. It's presence is ignored for this reason, it's what it's purpose is. If you need an element positioned left or right then use float

多宫格抽奖

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网上大多的多宫格抽奖都是自定义view，如果view的布局不一样而且太多的话容易出现oom，不好管理结合RecyclerView实现多宫格抽奖效果图如下满足所有矩形多宫格抽奖 9宫格 16宫格 25宫格也可以不是正方形比如 4行5列 acitivity的xml <android.support.v7.widget.RecyclerView android:id="@+id/recycleView" android:layout_width="match_parent" android:layout_height="match_parent" />recyclerView的adapter下面LuckRecyclerViewAdapter /** * Created by taq on 2018/7/3. */import android.animation.Animator;import android.animation.AnimatorListenerAdapter;import android.animation.ValueAnimator;import android.content.Context;import android.support.annotation.NonNull;import android.support.v4.content

CSS

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本节笔记整理 CSS笔记整理：在标签上设置style属性： background-color: #2459a2; height: 48px; ... 编写css样式： 1. 标签的style属性 2. 写在head里面 style标签中写样式（1）- id选择器 #i1{ background-color: #2459a2; height: 48px; } （2）- class选择器 ****** .名称{ ... } <标签 class='名称'> </标签> （3）- 标签选择器 div{ ... } 所有div设置上此样式（4）- 层级选择器（空格） ****** .c1 .c2 div{ } （5）- 组合选择器（逗号） ****** #c1,.c2,div{ } （6）- 属性选择器 ****** 对选择到的c1标签再通过属性再进行一次筛选 .c1[n='alex']{ width:100px; height:200px; } PS: - 优先级，标签上style优先（行间样式），编写顺序，就近原则（位置上下） 2.5 css样式也可以写在单独文件中 <link rel="stylesheet" href="commons.css" /> 3、注释 /* */ 4、边框 - 宽度，样式solid/dotted，颜色 (border: 4px dotted red;)

finding the last occurrence of an item in a list python

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I wish to find the last occurrence of an item 'x' in sequence 's', or to return None if there is none and the position of the first item is equal to 0 This is what I currently have: def PositionLast (x,s): count = len(s)+1 for i in s: count -= 1 if i == x: return count for i in s: if i != x: return None When I try: >>>PositionLast (5, [2,5,2,3,5]) >>> 4 This is the correct answer. However when I change 'x' to 2 instead of 5 I get this: >>>PositionLast(2, [2,5,2,3,5]) >>> 5 The answer here should be 2. I am confused as to how this is occurring, if anyone could explain to what I need to correct

Overlay div on top of parent with same size

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I need to overlay a child div to cover it's parent div when my drag and drop event starts, but I can't get the child div to be on top of the parent using z-index. Here is my HTML: <div class="some-element"> <div class="parent-div"> <div class="child-div"> <p>This should be over the parent</p> </div> <h1>Some text lorem ipsum</h1> </div> <div class="another-div"> <p>lorem ipsum</p> </div> </div> And here is my CSS html, body { height: 100%; width: 100%; } .some-element { background-color: blue; width: 100%; } .parent-div { background-color: red; height: 100%; position: relative; width: 100%; z

191121CSS

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一、CSS 1、css选择器 css选择器的使用方法 <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> <style> .c1{ background-color: #2459a2; height: 48px; } </style> </head> <body> <div class="c1">内容</div> <div class="c1">内容2</div> </body> </html> id选择器：#1 class选择器：.c1 标签选择器：div 层级选择器：.c1 .c2 组合选择器：.c1,.c2 属性选择器：.c1[type='text'] 2、引入css文件 <link rel="stylesheet" href="commons.css"> 3、基本样式 border: 1px solid red;边框 height: 48px;width: 200px;高和宽 font-size: 18px;字体大小 line-height:垂直居中 text-align:ceter:水平居中 font-weight:加粗 color:字体颜色 4、float 块级标签漂起来堆叠 <div style="width: 20%;background-color:

20191104 前端学习总结

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20191104学习总结（一）place holder 提示文字 imput type=“text” placeholder=“提示文字” （二）二级导航（1）定位体系：常规流浮动定位 1.定位 position：relative 相对定位是相对自己原来的位置 left：20px；距离左20px 即向右移动20px。 top：50px；向下移动50px。 2.非静态定位 position:absolute； left：0 px； top：0 px；相对body html 以包含它的离它最近的非静态定位元素的（0,0）点子绝父相 3.固定定位 position：fixed a{ position：fixed； right：0； bottom：100px； } 4.float flexbox absolute fixed 会脱离文档流相对定位和外边距，不会脱离文档流。出现元素重叠：用定位 5.Z-index 图层从1开始，要与position一起用例子： Z-index：1； position：relative；来源： https://www.cnblogs.com/Wardenclyffe/p/11909262.html

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