compressImage, 原图2.4m 压缩后 3.5m

plus.zip.compressImage({  
    src: src,  
    dst: '_doc/avatar-tmp.png',  
    quality: '20%'  
 }, function (e) {  
    console.log(e)  
    var target = e.target;  
    createImg(target);  
 }, function (err) {  
    console.log(err)  
 });