let num_array = "01,02,03,04,05,06,07,08,09,10"
let split_num_array = num_array.split(separator: ",")
var new_num_array = Array<String>()
for _num_array in split_num_array {     //
     new_num_array.append(String(format: "%d", Int(_num_array)!))
                                 }
let _new_array = new_num_array.joined(separator: ",")
//调用后输出
print (_new_array)          //结果：1,2,3,4,5,6,7,8,9,10