ios - Keep UIButton Size the same when activated multiple times -

i have uibutton constraints set width , height 80 80. when press uibutton activate uiscrollview menu, constraints changes , button looks image below. (the button blue oval shape @ bottom of screen)

here's viewwcontroller.m codes uibutton , uiscrollview animations.

#import "viewcontroller.h"  @interface viewcontroller ()   @end  @implementation viewcontroller @synthesize scrollview;  - (void)viewdidload {     [super viewdidload];     // additional setup after loading view, typically nib.     draw1 = 0;     scrollview.frame = cgrectmake(0, 300, 480, 55);     [scrollview setcontentsize:cgsizemake(480, 55)];      openmenu.frame = cgrectmake(220, 270, 60, 30); } - (void)viewdidappear:(bool)animated {     [super viewdidappear:animated];     draw1 = 1; }  - (ibaction)openmenu:(id)sender {     if (draw1 ==0) {         draw1 = 1;         [uiview animatewithduration:0.5                               delay:0.0                             options: uiviewanimationoptioncurveeaseout                          animations:^{                              scrollview.frame = cgrectmake(0, 1000, 568, 200);                              openmenu.layer.frame = cgrectmake(self.view.center.x - 30, self.view.frame.size.height - 80, 60, 30);                          }                          completion:^(bool finished){                              nslog(@"done!");                          }];     } else {         draw1 = 0;         [uiview animatewithduration:0.5                               delay:0.0                             options: uiviewanimationoptioncurveeaseout                          animations:^{                              scrollview.frame = cgrectmake(0, 300, 568, 200);                              openmenu.layer.frame = cgrectmake(self.view.center.x - 30, 270, 60, 30);                          }                          completion:^(bool finished){                              nslog(@"done!");                          }];     } } @end 

how can make button constraints says 80 80 , doesn't change when activated?

please check selected image. guess size on 80-80. or maybe, height > width.