ios - Setting an animation for a toolbar from the beginning -

i have textfield has uidatepicker instead of keyboard. made toolbar not connected datepicker appears when textfield tapped. problem animations. datepicker slides nicely, toolbar appears before animation of datepicker done. makes whole thing horrible. how set animation match datepickers? have no experience animations , none of other posts did me.

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edit

based on tareks answer able set animation slide doing following.

first, setting toolbar bottom of screen

pickerbar = [[uitoolbar alloc] initwithframe:cgrectmake(0, 480, 320, 44)];

seconds, changing location of toolbar in animation

[uiview animatewithduration:.4 animations:^(void) {      cgrect rect = cgrectmake(0, 224-46, 320, 44);      [pickerbar setframe:rect]; 

you can use code below show toolbar:

[uiview animatewithduration:2.0 animations:^(void) {     toolbar.alpha = 1; }]; 

edit:

toolbar.alpha should 0.

for sliding: gonna like:

[uiview animatewithduration:2 animations:^{      int newy = yval; // can play newy.      cgrect frame = toolbar.frame;      frame.origin.y = newy;      toolbar.frame  = frame; }];