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. JSP 指令 脚本元素 表达式 声明

    一.page指令 1. 可以使用page指令来控制JSP转换器转换当前JSP页 面的某些方面.例如,可以告诉JSP用于转换隐式对象 out的缓冲器的大小.内容类型,以及需要导入的Java 类型,等等. ...

  2. laravel 5.6

    compact() 建立一个数组,包括变量名和它们的值 打印结果: starts_with() 函数判断给定的字符串的开头是否是指定值

  3. 论文阅读笔记三十九：Accurate Single Stage Detector Using Recurrent Rolling Convolution（RRC CVPR2017）

    论文源址:https://arxiv.org/abs/1704.05776 开源代码:https://github.com/xiaohaoChen/rrc_detection 摘要 大多数目标检测及定 ...

  4. Python练习题

    内置函数 # 5.随意写一个20行以上的文件# 运行程序,先将内容读到内存中,用列表存储.# 接收用户输入页码,每页5条,仅输出当页的内容 def user_check(filename,num=5) ...

  5. 饮冰三年-人工智能-Python-14Python基础之变量与函数

    1:函数:函数是逻辑结构化和过程化的一种编程方法.函数即变量 #参数组:**字典 *列表 def test(x,*args): print(args); print(args[0]); print(& ...

  6. OpenCV-Python入门教程4-颜色空间转换

    一.颜色空间转换 import cv2 import numpy as np img = cv2.imread('lena.jpg') # 转换成灰度图 img_gray = cv2.cvtColor ...

  7. 考虑实现一个不抛异常的swap

    Effective C++:参考自harttle land 类的swap实现与STL容器是一致的:提供swap成员函数, 并特化std::swap来调用那个成员函数. class Widget { p ...

  8. [转]Linux下is not in the sudoers file解决方法

    来源: http://jingyan.baidu.com/article/2a1383284bb3e8074a134f2d.html 当我们使用sudo命令切换用户的时候可能会遇到提示以下错误:xxx ...

  9. 【Android】Android 4.0 Launcher2源码分析——启动过程分析

    Android的应用程序的入口定义在AndroidManifest.xml文件中可以找出:[html] <manifest xmlns:android="http://schemas. ...

  10. Centos7创建CA和申请证书

    转载:http://rackie386.blog.51cto.com/11279229/1947999 Centos7.3创建CA和申请证书 openssl 的配置文件:/etc/pki/tls/op ...