使用技术：

vue.js2.0、cropperjs、canvas

<template>
  <div id="app">
    <div id="demo">
      <!-- 遮罩层 -->
      <div class="container" v-show="panel">
        <div>
          <img id="image" :src="url" alt="Picture">
        </div>
 
        <button type="button" id="button" @click="crop">确定</button>
 
      </div>
 
      <div style="padding:20px;">
        <div class="show">
          <div class="picture" :style="'backgroundImage:url('+headerImage+')'">
          </div>
        </div>
        <div style="margin-top:20px;">
          <input type="file" id="change" accept="image" @change="change">
          <label for="change"></label>
        </div>
 
      </div>
    </div>
  </div>
</template>
 
<script>
  import Cropper from 'cropperjs'
  export default {
    components: {
 
    },
    data () {
      return {
        headerImage:'',
        picValue:'',
        cropper:'',
        croppable:false,
        panel:false,
        url:''
      }
    },
    mounted () {
      //初始化这个裁剪框
      var self = this;
      var image = document.getElementById('image');
      this.cropper = new Cropper(image, {
        aspectRatio: 1,
        viewMode: 1,
        background:false,
        zoomable:false,
        ready: function () {
          self.croppable = true;
        }
      });
    },
    methods: {
      getObjectURL (file) {
        var url = null ;
        if (window.createObjectURL!=undefined) { // basic
          url = window.createObjectURL(file) ;
        } else if (window.URL!=undefined) { // mozilla(firefox)
          url = window.URL.createObjectURL(file) ;
        } else if (window.webkitURL!=undefined) { // webkit or chrome
          url = window.webkitURL.createObjectURL(file) ;
        }
        return url ;
      },
      change (e) {
        let files = e.target.files || e.dataTransfer.files;
        if (!files.length) return;
        this.panel = true;
        this.picValue = files[0];
 
        this.url = this.getObjectURL(this.picValue);
        //每次替换图片要重新得到新的url
        if(this.cropper){
          this.cropper.replace(this.url);
        }
        this.panel = true;
 
      },
      crop () {
        this.panel = false;
        var croppedCanvas;
        var roundedCanvas;
 
        if (!this.croppable) {
          return;
        }
        // Crop
        croppedCanvas = this.cropper.getCroppedCanvas();
        console.log(this.cropper)
        // Round
        roundedCanvas = this.getRoundedCanvas(croppedCanvas);
 
        this.headerImage = roundedCanvas.toDataURL();
        this.postImg()
 
      },
      getRoundedCanvas (sourceCanvas) {
 
        var canvas = document.createElement('canvas');
        var context = canvas.getContext('2d');
        var width = sourceCanvas.width;
        var height = sourceCanvas.height;
 
        canvas.width = width;
        canvas.height = height;
 
        context.imageSmoothingEnabled = true;
        context.drawImage(sourceCanvas, 0, 0, width, height);
        context.globalCompositeOperation = 'destination-in';
        context.beginPath();
        context.arc(width / 2, height / 2, Math.min(width, height) / 2, 0, 2 * Math.PI, true);
        context.fill();
 
        return canvas;
      },
      postImg () {
        //这边写图片的上传
      }
    }
  }
</script>
 
<style>
  *{
    margin: 0;
    padding: 0;
  }
  #demo #button {
    position: absolute;
    right: 10px;
    top: 10px;
    width: 80px;
    height: 40px;
    border:none;
    border-radius: 5px;
    background:white;
  }
  #demo .show {
    width: 100px;
    height: 100px;
    overflow: hidden;
    position: relative;
    border-radius: 50%;
    border: 1px solid #d5d5d5;
  }
  #demo .picture {
    width: 100%;
    height: 100%;
    overflow: hidden;
    background-position: center center;
    background-repeat: no-repeat;
    background-size: cover;
  }
  #demo .container {
    z-index: 99;
    position: fixed;
    padding-top: 60px;
    left: 0;
    top: 0;
    right: 0;
    bottom: 0;
    background:rgba(0,0,0,1);
  }
 
  #demo #image {
    max-width: 100%;
  }
 
  .cropper-view-box,.cropper-face {
    border-radius: 50%;
  }
  /*!
   * Cropper.js v1.0.0-rc
   *
   * Copyright (c) 2017 Fengyuan Chen
   * Released under the MIT license
   *
   * Date: 2017-03-25T12:02:21.062Z
   */
 
  .cropper-container {
    font-size: 0;
    line-height: 0;
 
    position: relative;
 
    -webkit-user-select: none;
 
    -moz-user-select: none;
 
    -ms-user-select: none;
 
    user-select: none;
 
    direction: ltr;
    -ms-touch-action: none;
    touch-action: none
  }
 
  .cropper-container img {
    /* Avoid margin top issue (Occur only when margin-top <= -height) */
    display: block;
    min-width: 0 !important;
    max-width: none !important;
    min-height: 0 !important;
    max-height: none !important;
    width: 100%;
    height: 100%;
    image-orientation: 0deg
  }
 
  .cropper-wrap-box,
  .cropper-canvas,
  .cropper-drag-box,
  .cropper-crop-box,
  .cropper-modal {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
  }
 
  .cropper-wrap-box {
    overflow: hidden;
  }
 
  .cropper-drag-box {
    opacity: 0;
    #fff;
  }
 
  .cropper-modal {
    opacity: .5;
    #000;
  }
 
  .cropper-view-box {
    display: block;
    overflow: hidden;
 
    width: 100%;
    height: 100%;
 
    outline: 1px solid #39f;
    outline-color: rgba(51, 153, 255, 0.75);
  }
 
  .cropper-dashed {
    position: absolute;
 
    display: block;
 
    opacity: .5;
    border: 0 dashed #eee
  }
 
  .cropper-dashed.dashed-h {
    top: 33.33333%;
    left: 0;
    width: 100%;
    height: 33.33333%;
    border-top-width: 1px;
    border-bottom-width: 1px
  }
 
  .cropper-dashed.dashed-v {
    top: 0;
    left: 33.33333%;
    width: 33.33333%;
    height: 100%;
    border-right-width: 1px;
    border-left-width: 1px
  }
 
  .cropper-center {
    position: absolute;
    top: 50%;
    left: 50%;
 
    display: block;
 
    width: 0;
    height: 0;
 
    opacity: .75
  }
 
  .cropper-center:before,
  .cropper-center:after {
    position: absolute;
    display: block;
    content: ' ';
    #eee
  }
 
  .cropper-center:before {
    top: 0;
    left: -3px;
    width: 7px;
    height: 1px
  }
 
  .cropper-center:after {
    top: -3px;
    left: 0;
    width: 1px;
    height: 7px
  }
 
  .cropper-face,
  .cropper-line,
  .cropper-point {
    position: absolute;
 
    display: block;
 
    width: 100%;
    height: 100%;
 
    opacity: .1;
  }
 
  .cropper-face {
    top: 0;
    left: 0;
 
    #fff;
  }
 
  .cropper-line {
    #39f
  }
 
  .cropper-line.line-e {
    top: 0;
    right: -3px;
    width: 5px;
    cursor: e-resize
  }
 
  .cropper-line.line-n {
    top: -3px;
    left: 0;
    height: 5px;
    cursor: n-resize
  }
 
  .cropper-line.line-w {
    top: 0;
    left: -3px;
    width: 5px;
    cursor: w-resize
  }
 
  .cropper-line.line-s {
    bottom: -3px;
    left: 0;
    height: 5px;
    cursor: s-resize
  }
 
  .cropper-point {
    width: 5px;
    height: 5px;
 
    opacity: .75;
    #39f
  }
 
  .cropper-point.point-e {
    top: 50%;
    right: -3px;
    margin-top: -3px;
    cursor: e-resize
  }
 
  .cropper-point.point-n {
    top: -3px;
    left: 50%;
    margin-left: -3px;
    cursor: n-resize
  }
 
  .cropper-point.point-w {
    top: 50%;
    left: -3px;
    margin-top: -3px;
    cursor: w-resize
  }
 
  .cropper-point.point-s {
    bottom: -3px;
    left: 50%;
    margin-left: -3px;
    cursor: s-resize
  }
 
  .cropper-point.point-ne {
    top: -3px;
    right: -3px;
    cursor: ne-resize
  }
 
  .cropper-point.point-nw {
    top: -3px;
    left: -3px;
    cursor: nw-resize
  }
 
  .cropper-point.point-sw {
    bottom: -3px;
    left: -3px;
    cursor: sw-resize
  }
 
  .cropper-point.point-se {
    right: -3px;
    bottom: -3px;
    width: 20px;
    height: 20px;
    cursor: se-resize;
    opacity: 1
  }
 
  @media (min-width: 768px) {
 
    .cropper-point.point-se {
      width: 15px;
      height: 15px
    }
  }
 
  @media (min-width: 992px) {
 
    .cropper-point.point-se {
      width: 10px;
      height: 10px
    }
  }
 
  @media (min-width: 1200px) {
 
    .cropper-point.point-se {
      width: 5px;
      height: 5px;
      opacity: .75
    }
  }
 
  .cropper-point.point-se:before {
    position: absolute;
    right: -50%;
    bottom: -50%;
    display: block;
    width: 200%;
    height: 200%;
    content: ' ';
    opacity: 0;
    #39f
  }
 
  .cropper-invisible {
    opacity: 0;
  }
 
  .cropper-bg {
    background-image: url('data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQAQMAAAAlPW0iAAAAA3NCSVQICAjb4U/gAAAABlBMVEXMzMz////TjRV2AAAACXBIWXMAAArrAAAK6wGCiw1aAAAAHHRFWHRTb2Z0d2FyZQBBZG9iZSBGaXJld29ya3MgQ1M26LyyjAAAABFJREFUCJlj+M/AgBVhF/0PAH6/D/HkDxOGAAAAAElFTkSuQmCC');
  }
 
  .cropper-hide {
    position: absolute;
 
    display: block;
 
    width: 0;
    height: 0;
  }
 
  .cropper-hidden {
    display: none !important;
  }
 
  .cropper-move {
    cursor: move;
  }
 
  .cropper-crop {
    cursor: crosshair;
  }
 
  .cropper-disabled .cropper-drag-box,
  .cropper-disabled .cropper-face,
  .cropper-disabled .cropper-line,
  .cropper-disabled .cropper-point {
    cursor: not-allowed;
  }
 
 
</style>

Vue实现用户自定义上传头像裁剪的更多相关文章

  1. vue 剪切图片上传头像，使用 cropperjs 实现

    我使用的是vue,移动端的项目. 官网地址:cropperjs GitHub地址:https://github.com/fengyuanchen/cropperjs/blob/master/READM ...

  2. html5 上传头像的裁剪

    本示例使用HTML5 canvas,简单的编写了上传头像的裁剪效果,移动端支持拖拽后裁剪, 虽然样式不好看,但是功能还算全: 下图为裁剪后的效果: html部分: <!DOCTYPE html& ...

  3. Jcrop+uploadify+php实现上传头像预览裁剪

    最近由于项目需要,所以做了一个上传头像预览并且可以预览裁剪的功能,大概思路是上传的图片先保存到服务器,然后通过ajax从服务器获取到图片信息,再利用Jcrop插件进行裁剪,之后通过PHP获取到的四个裁 ...

  4. 上传头像,界面无跳转,php+js

    上传头像,界面无跳转的方式很多,我用的是加个iframe那种.下面直接上代码. html: //route 为后端接口//upload/avatar 为上传的头像的保存地址//imgurl=/uplo ...

  5. Android基础之——startActivityForResult启动界面并返回数据，上传头像

    在android应用的开发过程中,常常会出现启动一个界面后填写部分内容后带着数据返回启动前的界面,最典型的应用就是登录过程.在非常多应用程序的模块中,都有"我的"这个模块,在未登录 ...

  6. day105:Mofang:设置页面初始化&更新头像/上传头像&设置页面显示用户基本信息

    目录 1.设置页面初始化 2.更新头像 1.点击头像进入更新头像界面 2.更新头像页面初始化 3.更新头像页面CSS样式 4.头像上传来源选择:相册/相机 5.调用api提供的本地接口从相册/相机提取 ...

  7. swift上传头像

    很久没有写博客了,今天特地写了这个,也是一边仿照别人写的demo,注释部分都是需要的.需要的同学可以参考一下. @IBAction func headImageBtnPage(){  //上传头像 / ...

  8. 完美实现类似QQ的自拍头像、上传头像功能！（Demo 源码）

    现在很多下载客户端程序都需要设定自己头像的功能,而设定头像一般有两种方式:使用摄像头自拍头像,或者选择一个图片的某部分区域作为自己的头像. 一.相关技术 若要实现上述的自拍头像和上传头像的功能,会碰到 ...

  9. asp.net mvc上传头像加剪裁功能介绍

    正好项目用到上传+剪裁功能,发上来便于以后使用. 我不能告诉你们其实是从博客园扒的前台代码,哈哈. 前端是jquery+fineuploader+jquery.Jcrop 后台是asp.net mvc ...

随机推荐

  1. 新增 修改，对xx名字或者其他属性做校验判断是否存在

    需求描述:页面输入完xxName和xx编码,点击提交,根据两项内容做重复校验(就是看看数据库里有木有相同的) 解决思路:把这两个东西作为查询条件去查,查到有记录,提示已存在,就不执行新增或者修改操作. ...

  2. 【ssh】端口转发

    来源:https://www.ibm.com/developerworks/cn/linux/l-cn-sshforward/ 非常非常好用,可以通过跳板解决两台服务器无法连接的问题 第一部分 概述 ...

  3. C++ LocalAlloc() & LocalSize() & LocalFree ()

    关于LocalAlloc function,参考:https://msdn.microsoft.com/en-us/library/windows/desktop/aa366723(v=vs.85). ...

  4. time与datetime模块

    在python中,通常用下面几种方式来表示时间: 时间戳(timestamp):通常来说,时间戳表示的是从1970年1月1日00:00:00开始按秒计算的偏移量. 格式化的时间字符串(format s ...

  5. jquery 笔记 点击周围区域子类隐藏，点击子类内部的信息 不隐藏

    zilei.click(ev){ var e = ev||event; e.stopPropagation(); //dosomething } $(document).click(function( ...

  6. 论文阅读笔记二十：LinkNet: Exploiting Encoder Representations for Efficient Semantic Segmentation(CVPR2017)

    源文网址:https://arxiv.org/abs/1707.03718 tensorflow代码:https://github.com/luofan18/linknet-tensorflow 基于 ...

  7. 眼底血管分割训练函数（SVM，Adaboost）

    # -*- coding: utf-8 -*- import numpy as np from sklearn import svm from sklearn.model_selection impo ...

  8. 五.hadoop 从mysql中读取数据写到hdfs

    目录: 目录见文章1 本文是基于windows下来操作,linux下,mysql-connector-java-5.1.46.jar包的放置有讲究. mr程序 import java.io.DataI ...

  9. Visual Studio中的.suo（Solution User Options）文件

    其实关于.suo文件,官方文档和网上很多资料就说明的十分详细了,本文主要按照我自己的理解将其整理归纳成一篇笔记以备日后查看..suo文件全称为:Solution User Options,看了很多资料 ...

  10. CSS3 伸缩布局盒模型

    CSS3引入的布局模式Flexbox布局,主要思想是让容器有能力让其子项目能够改变其宽度,高度,以最佳方式填充可用空间.Flex容器使用Flex项目可以自动放大与收缩,用来填补可用的空闲空间.更重要的 ...