iOS - 转到带有 if 条件的页面

Question

我想在用户输入正确的用户名和密码后转到其他页面。怎么做 ？第一个菜单是 ViewController。第二种观点是 Utama。用户名从 username NSString 中获取，密码从 password NSString 中获取。

正确的用户名是“Andika”，正确的密码是 1234。

Storyboard

ViewController.h

 #import <UIKit/UIKit.h>

@interface ViewController : UIViewController
@property (weak, nonatomic) IBOutlet UILabel *appTittle;
@property (weak, nonatomic) IBOutlet UITextField *usernameTextField;
@property (weak, nonatomic) IBOutlet UITextField *passwordTextField;
- (IBAction)okPressed:(id)sender;

ViewController.m

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

    - (void)viewDidLoad {
        [super viewDidLoad];
    }

    - (void)didReceiveMemoryWarning {
        [super didReceiveMemoryWarning];
    }

    - (IBAction)okPressed:(id)sender {

        NSString *username = [_usernameTextField text];
        NSString *password = [_passwordTextField text];

        if([username compare:@"andika"] && [password compare:@"1234"]) {
                //????
        }

    }
@end

乌塔玛.m

#import "Utama.h"

@interface Utama ()

@end

@implementation Utama

- (void)viewDidLoad {
    [super viewDidLoad];
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
}

/*
#pragma mark - Navigation

// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    // Get the new view controller using [segue destinationViewController].
    // Pass the selected object to the new view controller.
}
*/

更新:对不起，我是新手。我仍然无法转到另一页。

我这样给标识符

这是修改ViewController.m中的代码

Answer 1

您可以像这样实例化 Utama。

Utama *vc = [[UIStoryboard storyboardWithName:@"nameOfStoryboard" bundle:nil] instantiateViewControllerWithIdentifier:@"Utama"];

如果ViewController在UINavigationController上，你可以使用

[self.navigationController pushViewController:vc animated:YES]

但是，如果 ViewController 是窗口的 rootViewController，您可以将 vc 设置为 rootViewController。

[window setRootViewController:vc];

确保 window 是您应用的关键窗口的实例。