ios webview在设置委派后未显示

我正在以编程方式设置webview，在我真正设置委托之前，一切都正常

MainPageViewController.h 下面是我设置委托时页面的外观：

以下是我未设置委托时页面的外观：

唯一的区别是这行代码：

[webViewForStories setDelegate:self];

以下是NSLog的相关输出：

2012-12-26 14:18:40.720 WGGB for iPad[3144:907] webviewForStories delegate is <MainPageViewController: 0x1f878cc0>
2012-12-26 14:18:40.721 WGGB for iPad[3144:907] webviewForStories is <UIWebView: 0x1f8838c0; frame = (0 300; 768 1004); layer = <CALayer: 0x1f883920>>

---

它们似乎都没有被调用。

尝试将委托设置为属性，而不是ivar

[self.webViewForStories setDelegate:self] 

---

让WebView调用您已实现的委托方法。

我想出来了。。。问题在于这种方法：

// This function allows me to intercept links clicked in a webview and open in
// a navigation window with a back button.
-(BOOL) webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType
{
    NSURL *url = request.URL;
    NSString *urlString = url.absoluteString;

    NSLog(@"urlstring is %@", urlString);

    // Only catching links without "mobile" in the url (i.e. stories)
    if ([urlString rangeOfString:@"/mobile"].location == NSNotFound && [urlString     rangeOfString:@"facebook"].location == NSNotFound && [urlString rangeOfString:@"facebook"].location == NSNotFound &&[urlString rangeOfString:@"twitter"].location == NSNotFound && [urlString rangeOfString:@"fb://"].location == NSNotFound && [urlString rangeOfString:@"liverail"].location == NSNotFound && [urlString rangeOfString:@"about:blank"].location == NSNotFound) {
        //DetailViewController *detailView = [[DetailViewController alloc] init];
        //[self.navigationController pushViewController:detailView animated:YES];

        return NO;
    } else {
        return YES;
    }
}

---

if语句在webview的初始加载时被捕获，因此它返回NO，这基本上给了我一个空白屏幕。在允许if语句运行之前，我必须检查这是否是初始加载。

您在web委托方法中做什么？缺少的tableview是问题所在吗？你所说的工作是什么意思，或者唯一的区别是什么？你是否意外地返回了

NO

，实现了

webView:shouldStartLoadWithRequest:navigationType:

？你可以实现

webView:didFailLoadWithError:

，看看它是否给你提供了任何提示。我更新了问题以显示委托方法，尽管没有一个被调用…@carcinbhai，你为什么说我缺少一个tableview？你的“works”屏幕截图中的故事列表，它是webview中显示的html视图吗？或者它是一个UITableView？不幸的是，这给出了相同的结果。仅供参考，我没有ivar，只有属性。是否可以将viewDidLoad代码移动到ViewDidDisplay？我仍然不知道你错在哪里。谢谢。这对我很有帮助。

-(void)webViewDidFinishLoad:(UIWebView *)webView
{
    NSLog(@"webview finished loading");
}

-(void)webViewDidStartLoad:(UIWebView *)webView
{
    NSLog(@"webview started loading");
}

// This function allows me to intercept links clicked in a webview and open in
// a navigation window with a back button.
-(BOOL) webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType
{
    NSURL *url = request.URL;
    NSString *urlString = url.absoluteString;

    NSLog(@"urlstring is %@", urlString);

    // Only catching links without "mobile" in the url (i.e. stories)
    if ([urlString rangeOfString:@"/mobile"].location == NSNotFound && [urlString rangeOfString:@"facebook"].location == NSNotFound && [urlString rangeOfString:@"facebook"].location == NSNotFound &&[urlString rangeOfString:@"twitter"].location == NSNotFound && [urlString rangeOfString:@"fb://"].location == NSNotFound && [urlString rangeOfString:@"liverail"].location == NSNotFound && [urlString rangeOfString:@"about:blank"].location == NSNotFound) {
        //DetailViewController *detailView = [[DetailViewController alloc] init];
        //[self.navigationController pushViewController:detailView animated:YES];

        return NO;
    } else {
        return YES;
    }
}

-(void)webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error
{
    NSLog(@"error is %@", [error localizedDescription]);
}

[self.webViewForStories setDelegate:self] 

// This function allows me to intercept links clicked in a webview and open in
// a navigation window with a back button.
-(BOOL) webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType
{
    NSURL *url = request.URL;
    NSString *urlString = url.absoluteString;

    NSLog(@"urlstring is %@", urlString);

    // Only catching links without "mobile" in the url (i.e. stories)
    if ([urlString rangeOfString:@"/mobile"].location == NSNotFound && [urlString     rangeOfString:@"facebook"].location == NSNotFound && [urlString rangeOfString:@"facebook"].location == NSNotFound &&[urlString rangeOfString:@"twitter"].location == NSNotFound && [urlString rangeOfString:@"fb://"].location == NSNotFound && [urlString rangeOfString:@"liverail"].location == NSNotFound && [urlString rangeOfString:@"about:blank"].location == NSNotFound) {
        //DetailViewController *detailView = [[DetailViewController alloc] init];
        //[self.navigationController pushViewController:detailView animated:YES];

        return NO;
    } else {
        return YES;
    }
}