My first iOS app. I have a UIWebView in my ViewController that I want to update

Question

I have a UIWebView in my ViewController that I want to update when the UIApplicationDelegate is passed a URL, like

myApp://?changeWebView=newstuff

I am building the new URL fine based on the data I am passing in but I can't figure out how to update my UIWebView

I have this in my AppDelegate.m:

- (BOOL)application:(UIApplication *)application openURL:(NSURL *)url
  sourceApplication:(NSString *)sourceApplication annotation:(id)annotation
{
    NSLog(@"Calling Application Bundle ID: %@", sourceApplication);
    NSLog(@"URL scheme:%@", [url scheme]);
    NSLog(@"URL query: %@", [url query]);
    NSLog(@"URL hash: %@", [url fragment]);

    NSURL *newURL = [NSURL URLWithString:@"URL constructed with pieces of passed URL data"];
    NSURLRequest *requestObj = [NSURLRequest requestWithURL:newURL];


 //now I want to update the UIWebview defined in my ViewController.h

    return YES;
}

Answer 1

You can load the request in webView by using loadRequest

[self.myWebView loadRequest:requestObj]; put this line in your code

You can post notifications to let know your view controller that you can load webview.

- (BOOL)application:(UIApplication *)application openURL:(NSURL *)url
  sourceApplication:(NSString *)sourceApplication annotation:(id)annotation
{
    NSLog(@"Calling Application Bundle ID: %@", sourceApplication);
    NSLog(@"URL scheme:%@", [url scheme]);
    NSLog(@"URL query: %@", [url query]);
    NSLog(@"URL hash: %@", [url fragment]);

    NSURL *newURL = [NSURL URLWithString:@"URL constructed with pieces of passed URL data"];
    NSURLRequest *requestObj = [NSURLRequest requestWithURL:newURL];

      //Post Notification
      [[NSNotificationCenter defaultCenter] postNotificationName:@"loadRequest"
                                  object:nil
                                  userInfo:@{@"requestObj":requestObj}];

    return YES;
}

Now in add notification observer in your viewController

-(void)viewDidLoad{

        //Add observer for notification
        [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(receiveEvent:) name:@"loadRequest" object:nil];
}

Write this method to load request in webView in your ViewController

- (void)receiveEvent:(NSNotification *)notification {
    // handle event
        NSURLRequest *requestObj = notification.userInfo[@"requestObj"];
       [self.myWebView loadRequest:requestObj];         
}