How can I display a certain message/alert after the user chooses certain values from a multicomponent picker in xcode?

I'm trying to display a message when the user chooses 2 values from a double component picker.

In case the user’s choice was "High Fever" and "Strong Cough", use an Alert View to display a message indicating: 'you should do the PCR Test'.

In case the user’s choice was a selection of "High Fever" and "Medium Cough" or "Medium Fever" and "Strong Cough", display a message indicating: 'it is just a normal flu'.

In case of all other possible selections, display a message: 'Relax... Nothing to worry about!'

Here is the code below:

#import "FirstViewController.h"#define kFeverComponent 0#define kCoughComponent 1@interface FirstViewController ()@property (strong, nonatomic) NSArray *feverTypes;@property (strong, nonatomic) NSArray *coughTypes;@property (weak, nonatomic) IBOutlet UIPickerView *dependentPicker;@end@implementation FirstViewController- (void)viewDidLoad {   [super viewDidLoad];   self.feverTypes = @[@"High Fever", @"Medium Fever", @"No Fever"];   self.coughTypes = @[@"Strong Cough", @"Medium Cough", @"No Cough"];}- (void)didReceiveMemoryWarning {   [super didReceiveMemoryWarning];}- (IBAction)symptomsButtonPressed:(id)sender {   NSInteger feverRow = [self.dependentPicker selectedRowInComponent: kFeverComponent];   NSInteger coughRow = [self.dependentPicker selectedRowInComponent: kCoughComponent];   NSString *fever = self.feverTypes[feverRow];   NSString *cough = self.coughTypes[coughRow];   NSString *message = [[NSString alloc] initWithFormat:     @"You chose %@ and %@.", fever, cough];   UIAlertController *alert =     [UIAlertController       alertControllerWithTitle:@"Thank you for choosing" message:message        preferredStyle:UIAlertControllerStyleAlert];   UIAlertAction *action = [UIAlertAction actionWithTitle:@"Okay"      style:UIAlertActionStyleDefault handler:nil];   [alert addAction:action];   [self presentViewController:alert animated:YES completion:nil];}#pragma mark -#pragma mark Picker Data Source Methods- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView {   return 2;}- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:    (NSInteger)component {   if (component == kCoughComponent) {     return [self.coughTypes count];} else {    return [self.coughTypes count];}}#pragma mark Picker Delegate Methods- (NSString *)pickerView:(UIPickerView *)pickerView    titleForRow:(NSInteger)row    forComponent:(NSInteger)component {    if (component == kCoughComponent) {      return self.coughTypes[row];    } else {      return self.feverTypes[row];}}@end