navbar button

[prchn4christ]

I am trying to create a share button for a Nav Bar. I've been able to create the button, and it is appearing on the pages I want it to. I've also set up a UIAlertView to bring up 3 buttons - to share with facebook, twitter, and email.

However, a few things I can't figure out:

How do I link the 'Share' button to the UIAlertView. I tried inserting the UIAlertView rename into the action selector, but it wasn't working. The UIAlertView is in the same .m file, does it need to go elsewhere?


UIBarButtonItem *shareButton = [[UIBarButtonItem alloc] initWithTitle:@"Share Article" style:UIBarButtonSystemItemDone target:nil action:@selector(????)];
self.navigationItem.rightBarButtonItem = shareButton;
[shareButton release];


Second, the UIAlertView pops a window in the middle of the screen. I'd rather it scroll up from the bottom. How can I change the type of UIAlertView?




Finally, I'd appreciate any code as to how to make the three buttons (facebook, email, twitter) take the text from the page and post it, or send it out. Thanks!

[o2fill]

For your first question, set the target to "self" and the selector to the name of the method you wish to call that will display the alertView - maybe something like "showShareAlert" which could be coded as ...

-(void)showShareAlert {
     UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Title" message:@"AThe message."  delegate:self cancelButtonTitle:@"button 1" otherButtonTitles: @"Facebook", @"Twitter", @"Email", nil];
		[alert show];
		[alert release];
}

Then you'll need a method to handle the response, something like:

- (void)alertView:(UIAlertView *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex {
  
  // the user clicked one of the buttons
  switch (buttonIndex){
        case 0:
         // handle a cancel event
         break;

        case 1:
        //handle a facebook share
        break;

        case 2:
        //handle twitter
        break;

        case 3:
        //handle email
        break;

        default:
        //do whatever
        break;
   }
 

}

be sure that your header file includes the AlertViewDelegate protocol declaration like this:

@interface aViewController : UIViewController <UIAlertViewDelegate>

You're on your own on the specifics of Facebook and Twitter. Sorry.

[o2fill]

Sorry, I forgot to answer the slide up from the bottom question. The answer is to use an ActionSheet instead of an AlertView. Here's a good tutorial on Action sheets:

iPhone SDK Tutorial: How to Make an Action Sheet | Iphone Development Exchange

[prchn4christ]

O2fill ...


THANKS! Instead of setting it up as a UIAlertView, I used the video tutorial and set it up as a UIActionSheet. I had been setting it up as a IBAction, which is clearly where I was going wrong, and hadn't been able to link it to the UIBarButtonItem.

The UIActionSheet must be what makes it perform by coming up from the bottom as opposed to just popping up. So, that button is now working ... again, thanks!

Now, anyone have code for facebook, twitter or email sharing? :-)