objective c - Filtering a NSMutableArray and returning only numbers -

i have nsmutablearray called mymutablearray inside him, have following values:

('r$ 118.98','ae 12.00 er','r$ 456.99') 

what do, find way filter information contained within array, making returns numeric characters, example:

('118.98','12.00','456.99') 

i have simple code lines inside array:

for(int x=0; x<[mymutablearray count]; x++){  mymutablearray[x];//we need find way filter , update informations store numbers.  } 

what code can put in code filter information inside array storing numbers?

try:

//create new mutable array store modified values nsmutablearray *arrfinal = [[nsmutablearray alloc] init];  //fast-enumerate within mymutablearray (nsstring *strcurrent in mymutablearray) {     nsstring *strmodified = [strcurrent stringbytrimmingcharactersinset:[[nscharacterset decimaldigitcharacterset] invertedset]];      [arrfinal addobject:strmodified]; }  nslog(@"%@",[arrfinal description]);