Question

In my app i want to display an error message if the network connection is too slow after few seconds. How should i implement this?
Here’s the code:

-(void)setProjectID:(NSString *)newProject {
    [self willChangeValueForKey:@"projectID"];
    [projectID release];
    projectID = [newProject copy];
    [self didChangeValueForKey:@"projectID"];

    // Since we have an ID, now we need to load it
    NSInvocation *returnInvocation = [NSInvocation invocationWithMethodSignature:
                                      [Detail instanceMethodSignatureForSelector:@selector(configureView:)]];
    [returnInvocation setTarget:self];
    [returnInvocation setSelector:@selector(configureView:)];
    [returnInvocation retainArguments];

    fetch = [[WBWDocumentFetcher alloc] init];
    [fetch retrieveDocument:[NSURL wb_URLForTabType:PROJECT_DETAILS inProject:projectID] returnBy:returnInvocation];
}
-(void)configureView:(NSDictionary *)serverResult 
{
}

Thanks,

Answer 1

You want to use performSelector:afterDelay: or possibly performSelector:withObject:afterDelay:.

Then, at the beginning of the method called, check to see if the page has loaded. If not, then display a UIAlertView and cancel the load.