如何移动UIImageView？

Question

交易如下： 我在 viewDidLoad 中编写了一个 UIImageView 代码，我希望它能随着我的功能 buttonPressed** 向下移动，而无需像我一样创建其他子视图。

这是代码。

-(void)viewDidLoad {

[super viewDidLoad];

banetteImage = [UIImage imageNamed:@"myBanette.png"];

UIImageView *banetteView = [[UIImageView alloc] initWithImage:banetteImage];
banetteView.frame = CGRectMake(100, -740, 568, 790);
banetteView.opaque = NO;

[NSTimer SchedulerWithTimeInterval:2.5 target:self 选择器:@selector(buttonPressed: ) userInfo:nil 重复:NO];

[self.view addSubview:banetteView];

}

-(void)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];

}

-(void)onAnimationComplete:(NSString *)animationID 完成:(NSNumber *)完成上下文:(void *)context {

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];

}

Answer 1

我发现通过调整此代码

http://mobile.tutsplus.com/tutorials/iphone/iphone-sdk-learning-about-touch-events-basic-game-animation/