Check if UIWebView is loaded

Question

I have an UIWebView in one tab that loads in viewDidLoad, but if user taps other tab the loading will be disrupted and - (void)webView:(UIWebView *)webView didFailLoad

Answer 1

If you haven't got it to work yet, here is a working example. It also shows an alert when failing to load, and the alert is only shown once.

Header:

@interface MyViewController : UIViewController  {
    BOOL wasLoaded;
    BOOL alertWasShown;
}

@property (nonatomic, retain) IBOutlet UIWebView *myWebView;

@end

Implementation:

- (void)loadWebView:(NSString *)urlString {
    if (wasLoaded == NO) {
        NSURL *url = [NSURL URLWithString:urlString];
        NSURLRequest *requestObject = [NSURLRequest requestWithURL:url];
        [myWebView loadRequest:requestObject];
    }
}

- (void)viewWillAppear:(BOOL)animated {
    NSString *urlString = @"put your url here";
    [self loadWebView:urlString];
}

- (void)viewDidLoad {
    [super viewDidLoad];

    wasLoaded = NO;
    alertWasShown = NO;
    myWebView.delegate = self;
}

- (void)webViewDidStartLoad:(UIWebView *)webView {
    // Not necessary to do anything here.
}

- (void)webViewDidFinishLoad:(UIWebView *)webView {
    wasLoaded = YES; // Indicates that it finished loading.
}

- (void)webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error {
    if (alertWasShown == NO) {
        UIAlertView *alert = ... // Create an alert.
        [alert show];

        alertWasShown = YES;
    }
}

I hope that helps.