MUI(拍照+系统相册)图片上传剪切预览
- <!DOCTYPE html>
- <html>
- <head>
- <meta charset="utf-8">
- <title>裁剪头像</title>
- <meta name="viewport" content="width=device-width,initial-scale=1,minimum-scale=1,maximum-scale=1,user-scalable=no" />
- <link href="../css/mui.min.css" rel="stylesheet" />
- <link href="../css/cropper.css" rel="stylesheet" />
- <style type="text/css">
- body {
- background-color: #000000;
- }
- #cropper-example-1 {
- background-color: #000000;
- height: 93%;
- width: 100%;
- position: absolute;
- }
- #quxiao,
- #xuanzhuan,
- #xuanqu {
- font-size: 20px;
- }
- .divbut {
- width: 100%;
- text-align: center;
- position: fixed;
- z-index: 2;
- bottom: 0px;
- background-color: #000000;
- height: 7.5%;
- line-height: 50px;
- }
- .divbut>div:first-child {
- float: left;
- width: 20%;
- }
- .divbut>div:last-child {
- float: right;
- width: 20%;
- }
- img#im {
- height: 100%;
- width: 100%;
- }
- </style>
- </head>
- <body>
- <div id="cropper-example-1" class="mui-hidden">
- <img id="im" alt="Picture" />
- </div>
- <div class="divbut">
- <div>
- <p id="quxiao" class="iconfont icon-quxiao">取消</p>
- </div>
- <div>
- <p id="xuanqu" class="iconfont icon-queding">确认</p>
- </div>
- </div>
- <img src="" alt="" class="mui-hidden" id="im_exif" />
- <script src="../js/jquery-1.9.min.js"></script>
- <script src="../js/mui.min.js"></script>
- <script src="../js/exif.js"></script>
- <script src="../js/cropper.min.js"></script>
- <script src="../js/app.min.js"></script>
- <script>
- (function(c) {
- var Cro = function() {}
- c.extend(Cro.prototype, {
- orientation: null,
- urldata: null,
- view: null,
- num: 0,
- sbx: null,
- sby: null,
- n: 0,
- onReady: function() {
- var that = this;
- mui.init();
- that.bindEvent();
- that.view = plus.webview.currentWebview();
- var img = document.getElementById("im_exif");
- img.src = that.view.path;
- img.addEventListener("load", function() {
- //exif调整图片的横竖
- EXIF.getData(this, function() {
- var orientation = EXIF.getAllTags(this).Orientation;
- $("#im").attr("src", that.loadcopyImg(img, orientation));
- document.getElementById("cropper-example-1").classList.remove("mui-hidden"); //显示裁剪区域
- that.cropperImg();
- });
- })
- },
- cropperImg: function() {
- var that = this;
- $('#cropper-example-1 > img').cropper({
- aspectRatio: 1 / 1,
- autoCropArea: 1,
- strict: true,
- background: false,
- guides: false,
- highlight: false,
- dragCrop: false,
- movable: false,
- resizable: false,
- crop: function(data) {
- that.urldata = that.base64(data);
- }
- });
- },
- loadcopyImg: function(img, opt) {
- var that = this;
- var canvas = document.createElement("canvas");
- var square = 500;
- var imageWidth, imageHeight;
- if(img.width > img.height) {
- imageHeight = square;
- imageWidth = Math.round(square * img.width / img.height);
- } else {
- imageHeight = square; //this.width;
- imageWidth = Math.round(square * img.width / img.height);
- }
- canvas.height = imageHeight;
- canvas.width = imageWidth;
- if(opt == 6) {
- that.num = 90;
- } else if(opt == 3) {
- that.num = 180;
- } else if(opt == 8) {
- that.num = 270;
- }
- if(that.num == 360) {
- that.num = 0;
- }
- var ctx = canvas.getContext("2d");
- ctx.translate(imageWidth / 2, imageHeight / 2);
- ctx.rotate(that.num * Math.PI / 180);
- ctx.translate(-imageWidth / 2, -imageHeight / 2);
- ctx.drawImage(img, 0, 0, imageWidth, imageHeight);
- var dataURL = canvas.toDataURL("image/jpeg", 1);
- return dataURL;
- },
- bindEvent: function() {
- var that = this;
- document.getElementById("quxiao").addEventListener("tap", function() {
- mui.back(); //取消就直接返回
- });
- document.getElementById("xuanqu").addEventListener("tap", function() {
- var preView = plus.webview.getWebviewById('plus/headinfo.html');
- //触发上一个页面刷新图片事件
- mui.fire(preView,'updateHeadImg',{
- img_path:that.urldata
- });
- mui.back();
- });
- },
- base64: function(data) {
- var that = this;
- var img = document.getElementById("im");
- var canvas = document.createElement("canvas");
- //像素
- canvas.height = 500;
- canvas.width = 500;
- var bx = data.x;
- var by = data.y;
- var ctx = canvas.getContext("2d");
- ctx.drawImage(img, bx, by, data.width, data.height, 0, 0, 500, 500);
- var dataURL = canvas.toDataURL("image/jpeg", 1.0); //第二个参数是质量
- return dataURL;
- }
- });
- var cro = new Cro();
- c.plusReady(function() {
- cro.onReady();
- })
- })(mui)
- </script>
- </body>
- </html>