Touch ID Example

touchID

LAContext *myContext = [[LAContext alloc] init];
NSError *authError = nil;
if ([myContext canEvaluatePolicy:LAPolicyDeviceOwnerAuthenticationWithBiometrics error:&authError]) {
    [myContext evaluatePolicy:LAPolicyDeviceOwnerAuthenticationWithBiometrics
              localizedReason:@"Authenticate to access secure information"
                        reply:^(BOOL success, NSError *error) {
                            if (success) {
                                NSLog(@"User is authenticated successfully");
                            } else {
                                NSLog(@"Authentication Fails");
                            }
                        }];
} else {
   NSLog(@"Can not evaluate Touch ID");
}