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继承人： 我在viewDidLoad中编写了一个UIImageView，并且我希望它可以随着我的功能buttonPressed **向下移动，而不需要像我那样创建其他子视图。如何移动UIImageView？
继承人的代码。
- （无效）viewDidLoad中{
[超级viewDidLoad中];
banetteImage = [UIImage imageNamed：@“myBanette.png”];
UIImageView *banetteView = [[UIImageView alloc] initWithImage:banetteImage];
banetteView.frame = CGRectMake(100, -740, 568, 790);
banetteView.opaque = NO;
[的NSTimer scheduledTimerWithTimeInterval：2.5目标：自选择器：@selector（buttonPressed：）USERINFO：无重复：NO];
[self.view addSubview:banetteView];
}
- （无效）buttonPressed {
double speed = 1/round(random() % 100) + 1.0;
[UIView beginAnimations:nil context:banetteView];
[UIView setAnimationDuration: 2*speed ];
banetteView.frame = CGRectMake(100, -2, 568, 790);
banetteView.opaque = NO;
UIImageView *banetteView = [[UIImageView alloc] initWithImage:banetteImage];
banetteView2.frame = CGRectMake(100, -740, 568, 790);
banetteView.opaque = NO;
banetteView.hidden = YES;
[self.view addSubview:banetteView];
// set a stop callback so we can cleanup the banette when it reaches the
// end of its animation
[UIView setAnimationDidStopSelector:@selector(onAnimationComplete:finished:context:)];
[UIView setAnimationDelegate:self];
[UIView commitAnimations];
}
- （无效）onAnimationComplete：（的NSString *）animationID完成：（的NSNumber *）完成上下文： （void *）上下文{
UIImageView *banetteView = context;
double speed = 1/round(random() % 100) + 1.0;
banetteView.frame = CGRectMake(100, -2, 568, 790);
banetteView2.opaque = NO;
[self.view addSubview:banetteView2];
[UIView beginAnimations:nil context:banetteView];
[UIView setAnimationDuration: 2*speed ];
[banetteView release];
}