iOS - 转到if条件的页面

Question

我想在用户插入正确的用户名和正确的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 。用户名来自用户名NSString ，密码来自密码NSString 。

正确的用户名是＆＃34; Andika＆＃34;正确的密码是1234。

故事板

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

Utama.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。我仍然无法访问另一页。

我给这样的标识符

这是ViewController.m中的修改代码

Answer 1

您可以像这样实例化Utama。

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

如果ViewController上有UINavigationController，您可以使用

[self.navigationController pushViewController:vc animated:YES]

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

[window setRootViewController:vc];

确保window是应用关键窗口的实例。

Answer 2

Utama 是一个uitabbarcontroller对吧！？如果您想在单击确定时转到第0个选项卡，请提供类似于＆＃34; DummyTab ＆＃34;的标识符。到Utama视图并使用下面的代码：

UITabBarController *controller = [self.storyboard instantiateViewControllerWithIdentifier:@"DummyTab"];
[self.navigationController pushViewController:controller animated:YES];
[controller setSelectedIndex:0];

Answer 3

使用此代码段解决您的问题：

   Utama *controller = [self.storyboard instantiateViewControllerWithIdentifier:@"Utama"];
    [self.navigationController pushViewController:controller animated:YES];

Answer 4

您需要嵌入导航控制器，即添加导航控制器并将其设置为初始视图控制器，并将登录视图控制器设置为导航控制器的根视图控制器，然后在成功凭据检查后，您可以按下面的其他视图控制器

    - (IBAction)okPressed:(id)sender {

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

    if([username compare:@"andika"] && [password compare:@"1234"]) {
[self.navigationController pushViewController:[self.storyboard instantiateViewControllerWithIdentifier:@"Utama storyboard identifier" animated:YES];
//also remove login view from stack
[self removeFromParentViewController];
}
}

Answer 5

- (IBAction)okPressed:(id)sender
{

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

  if ([username isEqualToString:@"andika"] == YES && [password isEqualToString:@"1234"] ==YES ) 
  {
      Utama *NextView = [[Utama alloc]initWithNibName:@"Utama" bundle:nil];
      [self.navigationController pushViewController:NextView animated:YES];
  }

}