Question

我为我的iPhone应用程序创建了一个登录屏幕，如果输入的密码正确但我不知道如何在if语句中更改视图，则应该从登录视图更改为主视图... 这是如果到目前为止做的（不是很多，我知道）

#import "ViewController.h"
#import "MainViewViewController.h"

@interface ViewController ()

@end

@implementation ViewController



- (IBAction)enterPassword
{
    NSString *passwordString = [NSString stringWithFormat:@"12345"];

    if ([passwordField.text isEqualToString:passwordString]) {

    }

    else {
        UIAlertView *correctPassword = [[UIAlertView alloc] initWithTitle:@"Falsches Passwort" message:@"Dieses Passwort ist falsch! Geben Sie bitte das korrekte Passwort ein!"   delegate:self cancelButtonTitle:@"Zurück" otherButtonTitles:nil, nil];
        [correctPassword show];
    }
}

- (IBAction)switchView:(id)sender {
    MainViewViewController *main = [[MainViewViewController alloc] initWithNibName:nil bundle:nil];
    [self presentViewController:main animated:YES completion:NULL];
}

- (void)viewDidLoad
{
    [super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end

这是整个ViewController.m文件，我想把switchview Action放到if语句中。如何在if语句中更改Views。

你能帮助我吗，我很感激谢谢Patrick

Answer 1

好吧，假设您的switchView方法正常工作，只需在if语句中调用它。

- (IBAction)enterPassword
{
    NSString *passwordString = [NSString stringWithFormat:@"12345"];

    if ([passwordField.text isEqualToString:passwordString]) {
        [self switchView:nil];
    }
    else 
    {
        UIAlertView *correctPassword = [[UIAlertView alloc] initWithTitle:@"Falsches Passwort" message:@"Dieses Passwort ist falsch! Geben Sie bitte das korrekte Passwort ein!"   delegate:self cancelButtonTitle:@"Zurück" otherButtonTitles:nil, nil];
        [correctPassword show];
    }
}

使用视图更改登录

1 个答案: