Load initial webview every time tabbar is pressed - objective-c

Question

Edited
My initial webview is loaded when a tabbar is pressed, then when clicked on the webview, I called
- (BOOL)webView:(UIWebView*)webView shouldStartLoadWithRequest:(NSURLRequest*)request navigationType:(UIWebViewNavigationType)navigationType
to detect the URLString clicked
When the string matches my destination string, I will call the segue [self performSegueWithIdentifier:#"NewsDet" sender:self]; and also pass the URLString and load the detail page on another ViewController
Now, when I click the another tabbar and then click back to this tabbar. The detail page remains. I want to refresh back to initial page. How do I do so?
Is it the I need to create a new class with a subclass of tabviewcontroller? Please help.
Gym.m
- (void)viewDidLoad {
[super viewDidLoad];
appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
sURL = appDelegate.gURL;
sURL = [sURL stringByAppendingString:#"/apps/gym.asp"];
NSURL *url = [NSURL URLWithString:sURL];
NSURLRequest *urlRequest = [NSURLRequest requestWithURL:url];
[webView setDelegate:(id<UIWebViewDelegate>)self];
[webView loadRequest:urlRequest];
UIRefreshControl *refreshControl = [[UIRefreshControl alloc] init];
[refreshControl addTarget:self action:#selector(handleRefresh:) forControlEvents:UIControlEventValueChanged];
[webView.scrollView addSubview:refreshControl];
}
- (void)handleRefresh:(UIRefreshControl *)refresh {
NSURL *url = [NSURL URLWithString:sURL];
NSURLRequest *urlRequest = [NSURLRequest requestWithURL:url];
[webView loadRequest:urlRequest];
[refresh endRefreshing];
}
- (void) viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
sURL = appDelegate.gURL;
sURL = [sURL stringByAppendingString:#"/apps/gym.asp"];
NSURL *url = [NSURL URLWithString:sURL];
NSURLRequest *urlRequest = [NSURLRequest requestWithURL:url];
[webView setDelegate:(id<UIWebViewDelegate>)self];
[webView loadRequest:urlRequest];
}
GymDet.m
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
sURL = self.urlString;
NSURL *url = [NSURL URLWithString:sURL];
NSURLRequest *urlRequest = [NSURLRequest requestWithURL:url];
[webView setDelegate:(id<UIWebViewDelegate>)self];
[webView loadRequest:urlRequest];
}
Basically I have 5 tab controllers. Each Tab has a Navigation Controller. When I click on say Tab-A it will load initial webview in VC1 then when I click on webview URL, it will navigate to a new VC say VC2 and load the detailed page.
Now, if I click on say Tab-B and back to Tab-A. I want it to load the initial webview or VC1. Now, my program always stay at VC2.

Answer 1

After clarification on what you're trying to do...
Your issue has nothing to do with webviews or loading URLs. The problem is that you are navigating to a new VC in your NavigationController, then switching tabs, then switching back and you are still at the "pushed" VC.
A comment not related to the problem:
I am on Tab-A, viewing VC-A1... Via "normal" Navigation Controller
action, VC-A2 slides-in from the right. Now I select Tab-B, and I see
VC-B1. Now, I want to switch back to Tab-A, and I expect to see what
was there: VC-A2... but instead, you want to send me back to VC-A1. That really doesn't follow Apple's interface guidelines, and can be very confusing to your users.
However, to accomplish that, you want to subclass UITabBarController and implement didSelectViewController:
#import "MyTabBarViewController.h"
#interface MyTabBarViewController () <UITabBarControllerDelegate>
#end
#implementation MyTabBarViewController
- (void) viewDidLoad {
[super viewDidLoad];
self.delegate = self;
}
-(void) tabBarController:(UITabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController {
if ([viewController isKindOfClass:[UINavigationController class]]) {
[(UINavigationController *)viewController popToRootViewControllerAnimated:NO];
}
}
#end
That will work, but it will "reset" any Navigation Controller in every tab. You'd need to add some other logic to handle only the first tab.
(original answer)
viewDidLoad is only called once - when the view loads. Switching between tabs does not "re-load" the view.
You probably want to reload your original URL in viewWillAppear as that will be called each time you switch back to that tab.
Although, you probably also want to check if the original URL is the current one displayed - you likely only want to reload it if it's not.
And... you never want to call [self viewWillAppear:YES]; -- that is a notification provided by the system.