jsÔõô½« base64ת»»³ÉͼƬ£¿²¢ÉÏ´«·þÎñÆ÷

var dataurl = avatar.getDataUrl();//base64ͼƬÊý¾Ý
if(!dataurl){
alert('Çë¶ÔͼƬ½øÐвüôµ÷Õû');
return;
}
//base64ͼƬתͼƬ
var arr = dataurl.split(','), mime = arr[0].match(/:(.*?);/)[1],
bstr = atob(arr[1]), n = bstr.length, u8arr = new Uint8Array(n);

while(n--){
u8arr[n] = bstr.charCodeAt(n);
}
var obj = new Blob([u8arr], {type:mime});

//ÉÏ´«Êý¾Ý
var fd = new FormData();
fd.append("file", obj,"image.png");
fd.append('sex', sex) // Èç¹û»¹ÐèÒª´«ÌæËû²ÎÊýµÄ»°
$.ajax({
url: url,
type: "POST",
processData: false,
contentType: false,
data: fd,
success: function(res){


}, 4000);
},
error: function(err){
console.log(err)
}
});