【美图】从字符串" com.meitu/mtxx/6.8.0(ios10.2)/lang:zh "中取出6.8.0

var myString=" com.meitu.mtxx/6.8.0(ios10.2)/lang:zh ";

myString=myString.trim();
var arr=myString.split("/");
var str=arr[1].split("(")[0];
console.log(str);