Mobile album image compression upload based on h5+ API

//female functionfunction App () {}/** * image compression, default proportional compression * @param {Object} path * The path to the PC can be a relative path, but the path that must be passed on the mobile side is the absolute path of the picture storage * @param {object} obj * Obj object has width, height, quality (0-1) * @param {Object} callback * callback function has one parameter, base64 string data*/App.prototype.dealImage=function (path, obj, callback) {varIMG =NewImage (); IMG.SRC=path; Img.onload=function () {varthat = This; //default scaled compression        varW =that.width, H=That.height, scale= w/h; W= Obj.width | |W; H= Obj.height | | (w/Scale ); varQuality =0.7;//default picture quality is 0.7//Build Canvas        varCanvas = document.createelement ('Canvas'); varCTX = Canvas.getcontext ('2d'); //To Create an attribute node        varANW = Document.createattribute ("width"); Anw.nodevalue=W; varAnh = Document.createattribute ("Height"); Anh.nodevalue=h;        Canvas.setattributenode (ANW);        Canvas.setattributenode (Anh); Ctx.drawimage (That,0,0, W, h); //Image quality        if(Obj.quality && obj.quality <=1&& obj.quality >0) {Quality=obj.quality; }        //The smaller the quality value, the more blurry the image is drawn.        varBase64 = Canvas.todataurl ('Image/jpeg', quality); //callback function returns the value of Base64Callback (base64); }}/** * get Picture Post processing callback processing data * @param {object} Delobj * required to process the parameters of the objects * @param {object} CB * Callback function returns the data to be processed, including the source file size, processing After the file size, file name*/APP.PROTOTYPE.DELPHOTOMSG=function (Delobj, CB) {varCamera =Plus.camera.getCamera (); varres = camera.supportedimageresolutions[0]; varFMT = camera.supportedimageformats[0]; var_this = This; varFileobj ={origin: {}, now: {}}; //Callback Object Interface//get the camera to take a picturecamera.captureimage (function (path) {Plus.io.requestFileSystem (Plus.io.PRIVATE_WWW, function (FS) { Fs.root.getFile (Path, {create:true}, Function (Fileentry) {fileentry.file (function (file) {//console.log ("Original File Size:" + file.size/1024 + "KB filename:" +file.name);origin (File.size, file.name); })}) function origin (filesize, filename) {//Mobile image Compression processingPlus.io.resolveLocalFileSystemURL (path, function (entry) {varLocal = Entry.tolocalurl ();//get Local address//image Compression Processing_this.dealimage (local, delobj, function (Base) {FileObj.now.base64Char=Base; FileObj.now.base64Length=Base. Length; FileObj.now.fileSize= (Base. Length/1024x768). ToFixed (2) +"KB"; FileObj.origin.fileSize= (FileSize/1024x768). ToFixed (2) +"KB"; FileObj.origin.filePath=Local; Fileobj.filename=filename;                CB (FILEOBJ); })}}}, function (err) {Console.log ("Get photo error:"+err.message); }, {resolution:res, format:fmt})}/** * * * @param {object} del * requires direct processing of parameter objects * For example: "{width:100, height:100, quality:0.5}" * The default processing is proportional, as long as you set the width or height,quality default 0.7 * @param {Object} options * Picture processing properties Handle file formats multiple select multiple files for Batch processing * For example: {filter: "Image", multiple:true} * @param {Object} callback * callback function returns the corresponding parameter * return Returns an array of objects, including the original file size * For example: obj[0].origin.filesize, Obj[0].now.filesize,obj[0].now.filepath, etc.*/App.prototype.delGalleryImg=function (Del, options, callback) {var_this = This; varFileobj ={now: {}, Origin: {}} plus.gallery.pick (function (Eve) {if(options.multiple) {delmultiple (Eve); //multiple photo processing callback functions}Else{Delsingle (Eve); //single picture processing callback function}},function (Err) {Console.log (Err.message)}, {Filter:options.filter||"Image", Multiple:options.multiple||false    })        //working with multiple picturesfunction Delmultiple (Eve) { for(vari =0, Len = eve.files.length; i < Len; i++){//Console.log (i + ":" + eve.files[i])(Function (i, Len) {//because this is an asynchronous operation, you need to automatically execute the function to pass in the value of index into the function for automatic executionRetValue (Eve.files[i], function (Filepro) {//Console.log (Json.stringify (Filepro))Inner (i, Len, Filepro); })}) (I, Len) }varCbobj = [];//a character array for staging JSON string sessionsfunction Inner (index, Len, result) {//Console.log (Index + "" + json.stringify (Result));Cbobj.push (json.stringify (result));//here, if you push the object directly into the numeric value, there will be the same object element (somehow), so a            if(Cbobj.length = =Len) {                varTempobj = [];//callback an array of objects after parsing the string                 for(vari =0; i < Len; i++) {//iterate through all the files for string parsing                    varobj =Json.parse (Cbobj[i]) tempobj[i]=obj;        } callback (Tempobj); //callback Array Object            }        }    }    //processing a single picturefunction Delsingle (path) {//invoking an internal function callback function for external single image selection processing property callbackRetValue (path, function (Filepro) {callback (FILEPRO);    }); } function RetValue (path, CB) {Plus.io.requestFileSystem (Plus.io.PRIVATE_WWW, function (FS) {fs.ro Ot.getfile (Path, {create:true}, Function (Fileentry) {fileentry.file (function (file) {//console.log ("Original File Size:" + file.size/1024 + "KB filename:" +file.name);origin (File.size, file.name); })            })        })        //callback functionfunction origin (filesize, filename) {//Mobile image Compression processingPlus.io.resolveLocalFileSystemURL (path, function (entry) {varLocal = Entry.tolocalurl ();//get Local address//image Compression Processing_this.dealimage (local, Del, function (Base) {FileObj.now.base64Char=Base; FileObj.now.base64Length=Base. Length; FileObj.now.fileSize= (Base. Length/1024x768). ToFixed (2) +"KB"; FileObj.origin.fileSize= (FileSize/1024x768). ToFixed (2) +"KB"; FileObj.origin.filePath=Local; Fileobj.filename=filename;                CB (FILEOBJ); })            })        }    }    }

This example is based on Hbuilder development, when encountering app mobile photo upload, photo album image compression upload, etc.

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Mobile album image compression upload based on h5+ API