self.progressView                      = [[ProgressView alloc] initWithFrame:CGRectMake(0, 0, 36, 36)];
self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:self.progressView];

[UIView animateWithDuration:1.0f
                      delay:1.0f
                    options:UIViewAnimationOptionCurveEaseInOut
                 animations:^{
                     self.transform = CGAffineTransformScale(self.transform, 0.25f, 0.25f);
                 }
                 completion:nil];

self.transform = CGAffineTransformScale(self.transform, 0.25f, 0.25f);

self.transform = CGAffineTransformMakeScale(0.25f, 0.25f);

frame: {{0, 0}, {0, 0}}
frame: {{0, 0}, {36, 36}}
frame: {{358, 4}, {36, 36}} // <-- This displays 3 times for some reason
frame: {{385, 17}, {9, 9}}