ios - RegEx: how to use regular expression with NSPredicate? -

i have table view display rows person's name property. table view allows user fussy search name. e.g. if user types in 'crp' match name 'chris paul'.

i have method takes search string , setup nspredicate search model's name in array

- (void)setpredicatewithtext: (nsstring *)searchtext {      (int = 0; < searchtext.length; ++)     {         nsstring *character = [searchtext substringwithrange:nsmakerange(i, 1)];         self.format = [self.format stringbyappendingformat:@".*%@",character];          if (i == searchtext.length -1) // last character         {           self.format = [self.format stringbyappendingstring:@".*"];         }     }     // result format == .*c.*r.*p.*     self.searchpredicate = [nspredicate predicatewithformat:@"self.name matches '%@'", self.format]; } 

and in other method:

 self.resultarray = [self.allplayers filteredarrayusingpredicate:self.searchpredicate]; 

but nothing comes result... please me, thanks!!

problem solved

there 2 things should change in code,

1) replace '%@' %@

2) add [c] ignore case sensitivity

the predicate should this,

[nspredicate predicatewithformat:@"self.name matches [c] %@", self.format]; 

finally method,

- (void)setpredicatewithtext: (nsstring *)searchtext {      (int = 0; < searchtext.length; ++)     {         nsstring *character = [searchtext substringwithrange:nsmakerange(i, 1)];         self.format = [self.format stringbyappendingformat:@".*%@",character];          if (i == searchtext.length -1) // last character         {             self.format = [self.format stringbyappendingstring:@".*"];         }     }     // result format == .*c.*r.*p.*     self.searchpredicate = [nspredicate predicatewithformat:@"self.name matches [c] %@", self.format]; }