通過URL，通過UIWebView點擊，不正確

Question

好吧，我目前有一個TabBarController與五個選項卡。每個選項卡都是UINavigationControllers。與選項卡關聯的每個視圖鏈接到包含具有UIWebView的視圖的XIB文件。我想要發生的是當UIWebView中的鏈接被點擊時，一個新的導航視圖（帶有後退按鈕）被推入堆棧並且內容被點擊的鏈接填充，實際發生的事情是靠近但沒有雪茄。它載入我離開的原始頁面，例如：我在www.example.com上，點擊鏈接並加載新視圖（使用後退按鈕），然後重新加載www.example.com：（

另外，我有viewDidLoad方法進行檢查，以確定哪個選項卡中選擇這反過來講什麼內容需要存在

這裏是我的代碼：

- (void)viewDidLoad { 
// Allows webView clicks to be captured. 
webView.delegate = self; 
// Places statsheet image centered into the top nav bar. 
UIImage *image = [UIImage imageNamed: @"header.png"]; 
UIImageView *imageView = [[UIImageView alloc] initWithImage: image]; 
self.navigationItem.titleView = imageView; 
[imageView release]; 

// Loads webpage according to the tab selected. 
if (self.tabBarController.selectedIndex == 0) { 
    [webView loadRequest: [ NSURLRequest requestWithURL: [ NSURL URLWithString: @"http://mobile.example.com" ] ] ]; 
} 
else if (self.tabBarController.selectedIndex == 1) { 
    [webView loadRequest: [ NSURLRequest requestWithURL: [ NSURL URLWithString: @"http://mobile.example.com/schedule" ] ] ];  
} 
else if (self.tabBarController.selectedIndex == 2) { 
    [webView loadRequest: [ NSURLRequest requestWithURL: [ NSURL URLWithString: @"http://mobile.example.com/roster" ] ] ]; 
} 
else if (self.tabBarController.selectedIndex == 3) { 
    [webView loadRequest: [ NSURLRequest requestWithURL: [ NSURL URLWithString: @"http://mobile.example.com/stats" ] ] ]; 
} 
else if (self.tabBarController.selectedIndex == 4) { 
    [webView loadRequest: [ NSURLRequest requestWithURL: [ NSURL URLWithString: @"http://mobile.example.com/about" ] ] ]; 
} 

// Loads the super class. 
[super viewDidLoad]; 

}

- (BOOL)webView:(UIWebView*)webView shouldStartLoadWithRequest:(NSURLRequest*)request navigationType:(UIWebViewNavigationType)navigationType { 

NSURL *url = request.URL; 
NSString *urlString = url.absoluteString; 
NSRange page = [ urlString rangeOfString: @"/?page=" ]; 
NSRange post = [ urlString rangeOfString: @"/posts/" ]; 
NSRange notBlog = [ urlString rangeOfString: @"example" ]; 
// Allow webapge to load if next or prev button is clicked. 
if (page.location != NSNotFound) { 
    return YES; 
} 
// Pass post link to new view with a back navigation button. 
else if (post.location != NSNotFound) { 
    NavigationViewController *newView = [[NavigationViewController alloc] initWithNibName:@"NavigationView" bundle:nil]; 
    // ^^^^^^^^^^^^^^^^^^ Here is where the new view is pushed but doesnt load the correct page 
    [self.navigationController pushViewController:newView animated:YES]; 
    UIBarButtonItem *backBarButtonItem = [[UIBarButtonItem alloc] 
    initWithTitle:@"Back" 
    style:UIBarButtonItemStyleBordered 
    target:nil 
    action:nil]; 
    self.navigationItem.backBarButtonItem = backBarButtonItem; 
    [backBarButtonItem release]; 
    [newView release]; 
    return NO; 
} 
// Allow all links that are a part of the five main pages to be loaded. 
else if (notBlog.location != NSNotFound) { 
    return YES; 
} 
//Allows everything else to be loaded into a new view with a back navigation button. 
else { 
    NavigationViewController *newView = [[NavigationViewController alloc] initWithNibName:@"NavigationView" bundle:nil]; 
// ^^^^^^^^^^^^^^^^^^ Here is where the new view is pushed but doesnt load the correct page 
    [self.navigationController pushViewController:newView animated:YES]; 
    UIBarButtonItem *backBarButtonItem = [[UIBarButtonItem alloc] 
    initWithTitle:@"Back" 
    style:UIBarButtonItemStyleBordered 
    target:nil 
    action:nil]; 
    self.navigationItem.backBarButtonItem = backBarButtonItem; 
    [backBarButtonItem release]; 
    [newView release]; 
    return NO; 
} 

}

Answer 1

在webView：shouldStartLoadWithRequest 中，您絕不會將URL傳遞給您創建的「NavigationViewController」實例。它不能工作...

所以每次調用viewDidLoad時，都會根據tabBar狀態調用您的4個URL之一。

這裏是你應該做的：

在NavigationViewController：

• 添加 「NSURL * PAGEURL」 屬性
• 創建一個良好的init方法：

-(id)initWithURL:(NSURL *)url 
{ 
    if ([super initWithNibName:@"NavigationView" bundle:nil]) 
    { 
     _pageURL = [url retain]; 
    } 
    return self; 
} 

而在viewDidLoad中：

if (_pageURL == nil) { 
// Loads webpage according to the tab selected. 
if (self.tabBarController.selectedIndex == 0) { 
    [webView loadRequest: [ NSURLRequest requestWithURL: [ NSURL URLWithString: @"http://mobile.example.com" ] ] ]; 
} 
else if (self.tabBarController.selectedIndex == 1) { 
    _pageURL = [ NSURL URLWithString: @"http://mobile.example.com/schedule" ];  
} 
else if (self.tabBarController.selectedIndex == 2) { 
    _pageURL = [ NSURL URLWithString: @"http://mobile.example.com/roster" ]; 
} 
else if (self.tabBarController.selectedIndex == 3) { 
    _pageURL = [ NSURL URLWithString: @"http://mobile.example.com/stats" ]; 
} 
else if (self.tabBarController.selectedIndex == 4) { 
    _pageURL = [NSURL URLWithString:@"http://mobile.example.com/about" ]; 
} 
} 

[webView loadRequest:[NSURLRequest requestWithURL:_pageURL]]; 

// Loads the super class. 
[super viewDidLoad]; 

然後正確初始化您的實例在web視圖：shouldStartLoadWithRequest

NavigationViewController *newView = [[NavigationViewController alloc] initWithURL:request.URL]; 

添加頂端

- （BOOL）webView的:(UIWebView *）webView shouldStartLoadWithRequest：（NSURLRequest *）請求導航類型：（UIWebViewNavigationType）導航nType {

NSURL * url = request.URL;

NSString * urlString = url.absoluteString;

如果（[urlString isEqualToString：_pageURL.absoluteString]）{返回YES;}

...