ios - iOS 在 Web View 中加载 html 文件时屏幕黑屏

Question

我试图在 WebView 中加载一个 html 文件，但屏幕变黑了。 View Controller 的层次结构是:查看

Web View Navigation Item This is the tab and there is navigation controller to present the View Controller.

代码:

- (void)viewDidLoad
{

    [super viewDidLoad];
    // Do any additional setup after loading the view.
    self.webView = [[UIWebView alloc] init];
    self.view.backgroundColor = [UIColor colorWithPatternImage:[JLTBackgroundHelper getBackgroundImageForLandingView]];
    self.webView.opaque = NO;
    self.webView.backgroundColor = [UIColor clearColor];

    UIViewController *rootVC = [[UIViewController alloc] init];
    rootVC.title = @"Contact JLT Sport";
    rootVC.view = self.webView;
    self.viewControllers = @[rootVC];

    NSString *fileName;
    if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) {
        // iPad-specific
        fileName = @"contact_ipad";
    } else {
        // iPhone-specific
        fileName = @"contact";
    }

    NSString *htmlFile = [[NSBundle mainBundle] pathForResource:fileName ofType:@"html" inDirectory:@"Assets/web"];

    NSURL *url = [NSURL fileURLWithPath:htmlFile];
    NSURLRequest *request =[NSURLRequest requestWithURL:url];
    [_webView loadRequest:request];
    _webView.delegate= self;

}


- (BOOL) webView:(UIWebView*)wv shouldStartLoadWithRequest:(NSURLRequest*)request navigationType:(UIWebViewNavigationType)navType
{
    if (navType == UIWebViewNavigationTypeLinkClicked
        && [request.URL.scheme hasPrefix:@"http"])
    {
        [[UIApplication sharedApplication] openURL:request.URL];
        return NO;
    }
    return YES;
}

不知道出了什么问题。尝试了 5 个多小时但没有成功。

Answer 1

代替

self.viewControllers = @[rootVC];

试试这个

[self presentViewController:rootVC animated:NO completion:nil];

如果在 viewDidLoad 中呈现 Controller 出现问题，则在 viewDidAppear 中呈现 Controller 。首先，我不清楚为什么要在 Controller 的 viewDidLoad 中创建另一个 View Controller 并向其添加 subview 。