how to convert NSString to NSArray [duplicate]

Answer 1

NSString* str = @"[90, 5, 6]";
NSCharacterSet *characterSet = [NSCharacterSet characterSetWithCharactersInString:@"[] "];
NSArray *array = [[[str componentsSeparatedByCharactersInSet:characterSet]
                        componentsJoinedByString:@""]     
                        componentsSeparatedByString:@","];