Performing Manual Segue between Views

#import "FirstViewController.h"

@interface FirstViewController ()

@end

@implementation FirstViewController

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    self.percentField.alpha = 0;
    self.percentLabel.alpha = 0;
    self.nextButton.alpha = 0;




}


- (IBAction)yesButton:(id)sender {
    self.percentField.alpha = 1;
    self.percentLabel.alpha = 1;
    self.nextButton.alpha = 1;

}

- (IBAction)nextPressed:(id)sender {
    float textBoxValue = [[NSDecimalNumber decimalNumberWithString:self.percentField.text]floatValue];
    if (textBoxValue > 105.00 || textBoxValue < 0.0) {
        UIAlertView *errorAlert = [[UIAlertView alloc] initWithTitle:@"Error" message:@"Value Cannot Exceed 105.0%" delegate:nil cancelButtonTitle:@"Okay" otherButtonTitles: nil];
        [errorAlert show];
        self.percentField.text = @"";

    } else {
        NSLog(@"\nSuccess");
        [self performSegueWithIdentifier:@"nextScreen" sender:self];

    }

}