Triggering a custom action in a tab bar controller

Question

Hey guy,
As you know, normally, when you click an item in a tab bar it is going to load a view right?
But I was wondering if there is a way to trigger a custom action when you click an item in a tab bar controller instead of loading a view.
If there is a way to do it, then how to do it?

Answer 1

Hi David -
Daviiidddd wrote:
if there is a way to trigger a custom action when you click an item in a tab bar controller instead of loading a view.
I think the implementation would depend on whether you wanted the custom action item to remain "selected", and if so, for how long? In other words, is the action item momentary or selectable? In either case, can we assume that tapping the action item leaves the current view visible? If not, what will the user see? Will the action item be visible from all the other views?
As you know, normally, when you click an item in a tab bar it is going to load a view right? \[emphasis added by friendly neighborhood helper\]
If you see most of us nodding, "yes", in agreement, it might be time to review [Tab Bars|http://developer.apple.com/iphone/library/documentation/UserExperience/Con ceptual/MobileHIG/SpecialViews/SpecialViews.html#//apple_ref/doc/uid/TP40006556- CH10-SW13] in the +iPhone Human Interface Guidelines+. Make sure your idea doesn't do something tab bars aren't expected to do. If you're not sure, look at some of the other UI options, e.g. [Toolbars|http://developer.apple.com/iphone/library/documentation/UserExperienc e/Conceptual/MobileHIG/SpecialViews/SpecialViews.html#//apple_ref/doc/uid/TP4000 6556-CH10-SW10], to see if there's a better fit for what you're doing.
\- Ray