围绕圆周移动 UIImageView

Question

我目前正在为iPhone开发一款游戏，其中许多图像将围绕圆圈旋转。我已经达到了我必须编写代码才能实现这一目标的地步。我对我必须使用什么数学运算以及如何实现这一点感到困惑。如果可以使用代码示例来解释该过程，这将非常有帮助。如果有人对我的意思感到困惑，我只是试图以静止的速度在圆周周围移动 UIImageView 的中心。任何帮助，不胜感激。:)

Answer 1

CGRect rect1; CGRect rect2; CGRect rect3;....

in viewdidload（）{

rect1 = imageView1.frame
rect2 = imageView2.frame;
rect3 = imageView3.frame;

[UIImageView beginAnimations:nil context:nil];


[UIImageView setAnimationDelegate:self];
[UIImageView setAnimationBeginsFromCurrentState:YES];
[UIImageView setAnimationDuration:1.5];
[UIImageView setAnimationDidStopSelector:@selector(rotate:)];
imageView1.center = CGPointMake(rect2.origin.x, rect2.origin.y);
imageView1.transform = CGAffineTransformMakeScale(1.2, 1.2);
imageView2.center = CGPointMake(rect3.origin.x, rect3.origin.y);
imageView2.transform = CGAffineTransformMakeScale(2, 2);
    [UIImageView commitAnimations];
     }
- (void)rotate:(NSString *)animationID
   {
[UIImageView beginAnimations:nil context:nil];
[UIImageView setAnimationDelegate:self];
[UIImageView setAnimationBeginsFromCurrentState:YES];
[UIImageView setAnimationDuration:1.5];
[UIImageView setAnimationDidStopSelector:@selector(rotate1:)];
imageView1.center = CGPointMake(rect3.origin.x, rect3.origin.y);
imageView1.transform = CGAffineTransformMakeScale(2, 2);
imageView1.alpha = 1;
imageView2.center = CGPointMake(rect4.origin.x, rect4.origin.y);
imageView2.transform = CGAffineTransformMakeScale(1.2, 1.2);
imageView2.alpha = .5;
    .....
   [UIImageView commitAnimations];
     }
     - (void)rotate1:(NSString *)animationID
    {
[UIImageView beginAnimations:nil context:nil];
[UIImageView setAnimationDelegate:self];
[UIImageView setAnimationBeginsFromCurrentState:YES];
[UIImageView setAnimationDuration:1.5];
[UIImageView setAnimationDidStopSelector:@selector(rotate2:)];
imageView1.center = CGPointMake(rect4.origin.x, rect4.origin.y);
imageView1.transform = CGAffineTransformMakeScale(1.2, 1.2);
imageView1.alpha = .5;
imageView2.center = CGPointMake(rect5.origin.x, rect5.origin.y);
imageView2.transform = CGAffineTransformMakeScale(1, 1);
imageView2.alpha = .15;
     ....
    [UIImageView commitAnimations];
      }
     try like this