Hello, all ...
I've a question about the UINavigationController backBarButtonItem property. I
wanted to merely set my own image for the back button, instead of it using the
title of the controller above in the hierarchy. So, this is what I did (yes
this app is using Three20, but I don't think that's the reason):
- (id)initWithNavigatorURL:(NSURL *)URL query:(NSDictionary *)query
{
if (self = [super initWithNavigatorURL:URL query:query])
{
self.navigationItem.backBarButtonItem = [[[UIBarButtonItem
alloc] initWithImage:[UIImage imageNamed:@"backarrow.png"]
style:UIBarButtonItemStylePlain target:self action:@selector(back)]
autorelease];
}
return self;
}
- (void)back:(id)sender
{
}
Now, this worked -- but I wasn't _expecting_ it to work. I was expecting that
my "back" selector would be called, and I would have to tell the nav controller
to pop. However, my "back" selector isn't called, and the back button _works_
like it always has. While i'm not in any way against freebees like this, i'm a
bit concerned as to _why_ it works like this. Any explanation would be
appreciated, explanations that actually edify me more so :-)
Regards,
John
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