指定的字符串按“o”截取
当一个base64需要剪去前面的部分的时候
var params={
"imgJustBase64":this.zheng.split(",")[1],
"imgBackBase64": this.fan.split(",")[1],
}
var params={
"imgJustBase64":this.zheng.split(",")[1],
"imgBackBase64": this.fan.split(",")[1],
}