Question

我有一个导航控制器应用程序，我正在使用此代码切换视图：

-    (IBAction)switchPage:(id)sender
    {
    if(self.fourthViewController == nil)
    {
        FourthViewController *fourthView = [[FourthViewController alloc]
                                              initWithNibName:@"FourthView" bundle:[NSBundle mainBundle]];
        self.fourthViewController = fourthView;
        [fourthView release];
    }

            [self.navigationController pushViewController:self.fourthViewController    animated:YES];
    }

但是我希望有一个可以转到UIWebview的备用视图的按钮，我的目标是不离开应用程序，这样当用户在网页上完成时，导航控制器永远不会消失，他们可以继续到下一个观点。

有没有人知道可以提供帮助的教程？

Answer 1

为什么不使用模态视图？这是我的一个应用程序的示例。下面是我在导航控制器导航栏上分配一个信用栏按钮项目，当点击时，它会显示提供webview的模态视图控制器。真的很简单：

UIBarButtonItem *credits = [ [ [ UIBarButtonItem alloc ] 
           initWithTitle:@"More"
           //  initWithCustomView:testLabel
           style: UIBarButtonItemStylePlain
           target: self 
           action:@selector(credits) 
           ]
         autorelease ];

  self.navigationItem.rightBarButtonItem = credits;


-(void)credits {
 if (self.whyModalViewController == nil)
        self.whyModalViewController = [[[ModalViewController alloc] initWithAppDelegate:self ] autorelease];


 NSString *html = [ [ NSString alloc ] initWithFormat:@"%@", self.explain];

 NSString *imagePath = [[NSBundle mainBundle] resourcePath];
 NSLog(@"imagePath = %@ ",imagePath);
 imagePath = [imagePath stringByReplacingOccurrencesOfString:@"/" withString:@"//"];
 imagePath = [imagePath stringByReplacingOccurrencesOfString:@" " withString:@"%20"];


 [self.whyModalViewController.webView loadHTMLString:html baseURL:[NSURL URLWithString: [NSString stringWithFormat:@"file:/%@//",imagePath]]];




 [self presentModalViewController:whyModalViewController animated:YES];


 [html release];
}

有很多方法可以回到主视图。我在webview上实现了一个“后退”按钮，它取消了模态视图控制器：

UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
        [button addTarget:self action:@selector(dismissAction:) forControlEvents:UIControlEventTouchUpInside];
        NSString *title = @"<- Back";
        button.backgroundColor = [UIColor clearColor];
        [button setTitle: title forState:UIControlStateNormal];

- (IBAction)dismissAction:(id)sender
{
    [self.parentViewController dismissModalViewControllerAnimated:YES];
}

使用导航控制器模板和获取按钮来加载UIwebview而无需离开应用程序

1 个答案: