Question

How can I create a custom popup tab bar. that has a small button and once pressed it appears from the bottm and it goes back when the small button get pressed again?

Answer 1

You can animate the position of a view by changing its center or frame property within an animation block. See here and here for documentation.

You essentially create your view off the screen, then animate it onto the screen:

// View is off the bottom of the screen
UIView *myView = [[UIView alloc] initWithFrame:CGRectMake(0,480,320,44)];

// Animate it onto the screen
[UIView animateWithDuration:0.25 animations:^{myView.frame = CGRectMake(0,436,320,44);}];