How can I have a function called on tabBar Button press but only if the view is currently the one being pressed?

Question

I'm trying to implement a feature similar to facebook and the reddit app so that when I press the news feed button while viewing the news feed it scrolls to the top. However when I press the news feed button from another tab it simply loads the cached state of the view controller. I want to have a similar feature where pressing the tab bar item associated with the current view active calls a function.

score 0 · Answer 1 · edited May 23 '17 at 11:58

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Have you tried this? set up an action with a tab bar item - iphone Then put your re-loading code within that didSelectItem method.

edited May 23 '17 at 11:58

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answered Jul 08 '16 at 00:31

user1549792

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score 0 · Answer 2 · answered Jul 08 '16 at 02:25

So after doing some testing I found out that the delegate call to UITabBarControllerDelegate occurs in betweenviewWillAppearandviewDidAppearso I simply set a boolean value to false inviewWillAppearand change it inviewDidAppear`.

How can I have a function called on tabBar Button press but only if the view is currently the one being pressed?

2 Answers2