Loading different urls in webview depending on segue from alert - ios

Question

In my app, there are different buttons that trigger different alert views. Each one has an option to click "More Information" which directs to the same UIWebView. I want to load a different url in the webview depending on which alert directed it to the webview.
I tried creating different segue identifiers and have attached that code. But the webview is blank/doesn't load the url. Is there a way to make this work using different segue identifiers? Or is there a better way to do this where I can use the same segue for all of the alerts but still load different urls in the webview? How do I tell the webview which one to load?
HomeViewController.m
-(void) alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex{
if (buttonIndex == 1){
if (alertView.tag==1) {
[self moreInfo];
}
}
}
-(void) moreInfo{
[self performSegueWithIdentifier:#"morebainfo" sender:nil];
}
-(void)ftmoreinfo{
[self performSegueWithIdentifier:#"moreftinfo" sender:nil];
}
- (IBAction)bainfo:(id)sender {
UIAlertView *baAlert =[[UIAlertView alloc] initWithTitle:#"Bacillus anthracis"
message:#"This is the message."
delegate:self
cancelButtonTitle:#"OK"
otherButtonTitles:#"More Information", nil];
baAlert.tag=1;
[baAlert show];
}
- (IBAction)ftinfo:(id)sender {
UIAlertView *ftAlert =[[UIAlertView alloc] initWithTitle:#"Francisella tularensis"
message:#"This is the message."
delegate:self
cancelButtonTitle:#"OK"
otherButtonTitles:#"More Information", nil];
[ftAlert show];
}
WebViewController.m
#interface MoreInfoViewController ()
#end
#implementation MoreInfoViewController
#synthesize MoreInfoWeb;
#synthesize loadUrl;
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender{
if ([segue.identifier isEqualToString: #"morebainfo"]){
MoreInfoViewController *webview = [segue destinationViewController];
webview.loadUrl = #"http://example.com/";
}
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.
NSURL *urlToLoad = [NSURL URLWithString:self.loadUrl];
[self.MoreInfoWeb loadRequest:[NSURLRequest requestWithURL:urlToLoad]];
}

Answer 1

Here's how I ended up fixing it:
I moved the prepare for segue method to the initial view controller:
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender{
NSLog(#"prepareForSegue: %#", segue.identifier);
if ([segue.identifier isEqualToString: #"morebainfo"]){
MoreInfoViewController *webview = [segue destinationViewController];
webview.loadUrl = #"http://www.cdc.gov/anthrax/";
}
and then I gave each alert it's own tag:
- (IBAction)bainfo:(id)sender {
UIAlertView *baAlert =[[UIAlertView alloc] initWithTitle:#"Title"
delegate:self
cancelButtonTitle:#"OK"
otherButtonTitles:#"More Information", nil];
baAlert.tag=1;
[baAlert show];
}
Each tag called a different method:
-(void) alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex{
if (buttonIndex == 1){
if (alertView.tag==1) {
[self moreInfo];
}
}
The methods performed the segues:
-(void) moreInfo{
[self performSegueWithIdentifier:#"morebainfo" sender:nil];
}
Fianlly, in the viewdidLoad of the webviewcontroller, I added:
NSURL *WebUrl = [NSURL URLWithString:self.loadUrl];
NSURLRequest *WebRequest = [NSURLRequest requestWithURL:WebUrl];
[MoreInfoWeb loadRequest:WebRequest];
And that worked! the main thing that helped was moving the prepare for segue method to the initial view controller instead of the webview controller