ios - Have string represent integer value - Obj C -

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i have situation there either 4 options or less. options a,b,c,d (or a,c or a,c,d...ect). , each option associated integer value 0 - 4000. , if 4 options a,b,c,d available want represent 0-999, b represent 1000-1999...ect. if options a,c,d want = 0-999, c = 1000-2999 & d = 3000-4000, , on different types of options, can input values depending on options available (not spilt evenly). bunch of if statements seems impractical.

if (a & b & c & d) {     = 0-999;     b = 1000-1999;     ... } else if(a & c & d) {    ... } //and on , on lot of combinations

there must better way set up, , more efficient bunch of if statements, how go doing this?

thanks in advance.

keep options in array,

    nsarray *options=@[@"a",@"b",@"c"];     int i=-1;     (nsstring *s in options) { //        assign options value         i++; //      s = i+999      stuff assign value option.          i=i+999;      }

if want do.


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