Question

我有3节课。

第一个控制器是tabbar中的第一个控制器。我使用presentModalViewController来呈现登录屏幕和主屏幕。我在firstcontrollor中有一个presentModalViewController，它提供登录屏幕，在Loginscreen viewdidload方法中，我有presentModalViewController，它呈现主屏幕。主屏幕presentModalViewController在homePage_Btn_Clicked中被解除，而presentModalViewController在login_Btn_Clicked中被解除。我遇到的问题是我的主屏幕从未出现过。有帮助吗？我是iPhone开发的新手。

//First Controllor

FirstControllor.m

- (void)viewDidLoad
{
    [super viewDidLoad];

    Accounts_Login *lvc = [[Accounts_Login alloc]initWithNibName:@"Accounts_Login" bundle:[NSBundle mainBundle]];
    [self presentModalViewController:lvc animated:NO];    
    [lvc release];

}

//Login_view class

Login_view.m

- (void)viewDidLoad {

    [super viewDidLoad];

    Home_Screen *lvc1 = [[Home_Screen alloc]initWithNibName:@"Home_Screen" bundle:[NSBundle mainBundle]];
    [self presentModalViewController:lvc1 animated:NO];    
    [lvc1 release];

    user_ID_TextField.text = [[NSUserDefaults standardUserDefaults] objectForKey:@"User ID"];

}

-(IBAction) login_Btn_Clicked{

    if ([services authenticate:credential_Data]) {

        [self dismissModalViewControllerAnimated:YES];

    [credential_Data autorelease];
}

//HomePage class

HomePage.m

    -(IBAction) homePage_Btn_Clicked:(id) sender{

    UIButton *theButton = (UIButton *)sender;

    int count;

    switch (theButton.tag) {

        case 101:
            count++;
            [self dismissModalViewControllerAnimated:YES];
            break;
        default:
            break;
    }

}

Answer 1

将presentModalView从viewDidLoad移至viewDidAppear。

Answer 2

试试这个：

Home_Screen *lvc1 = [[Home_Screen alloc]initWithNibName:@"Home_Screen" bundle:[NSBundle mainBundle]];
[self.parentViewController presentModalViewController:lvc1 animated:NO];    
[lvc1 release];

presentModalViewController没有响应

2 个答案: