当然最好应该使用block的方式，在此只是标记一下。
self.firstButton.backgroundColor = [UIColorgreenColor];
CGRect frame = self.firstButton.frame;
frame.origin.x = 320;
self.firstButton.frame = frame;
[UIViewbeginAnimations:@"testAnimation"context:NULL];
[UIViewsetAnimationDuration:8.8f];
[UIViewsetAnimationCurve:UIViewAnimationCurveLinear];
[UIViewsetAnimationDelegate:self];
[UIViewsetAnimationRepeatAutoreverses:NO];
[UIViewsetAnimationRepeatCount:999999];
frame = self.firstButton.frame;
frame.origin.x = -frame.size.width;
self.firstButton.frame = frame;
[UIViewcommitAnimations];
