Move a UIImage at a angle with acceleration - objective-c

Question

I have a series of UIImageViews all hooked up in IBOutlet collection that I would like to move at whatever angle they are facing at a set acceleration speed.
The first thing I do is randomly put them at an angle (ie: 35, 90, 70, 270 degrees) and now I would like to move them.
The images are icons of planes and I would like to move each plane icon at a certain angle (whatever angle they are currently facing) and at a certain acceleration (say 2-4 pixels or something).
The only issue is I am not really sure how to move a UIImage at a given angle at a given acceleration.
Is there are a way to do this with Core Animation?
Many thanks
Update:
I rewrote the method with seperate Objects to handle the Airplanes themselves and try to use UIBezierPath;
// Angles for airplane icons
VICAirplane *plane1 = [[VICAirplane alloc] initWithX:48 withY:104 withAngle:140 withSpeed:5];
VICAirplane *plane2 = [[VICAirplane alloc] initWithX:50 withY:250 withAngle:60 withSpeed:7];
VICAirplane *plane3 = [[VICAirplane alloc] initWithX:280 withY:75 withAngle:240 withSpeed:12];
VICAirplane *plane4 = [[VICAirplane alloc] initWithX:230 withY:270 withAngle:120 withSpeed:3];
VICAirplane *plane5 = [[VICAirplane alloc] initWithX:148 withY:225 withAngle:85 withSpeed:10];
VICAirplane *plane6 = [[VICAirplane alloc] initWithX:175 withY:225 withAngle:85 withSpeed:8];
self.airplanes = #[plane1,plane2,plane3,plane4,plane5,plane6];
UIImage *sprite = [UIImage imageNamed:#"Plane Shadow"];
CGFloat spriteWidth = sprite.size.width;
CGFloat spriteHeight = sprite.size.height;
for (VICAirplane *planeObj in self.airplanes) {
CALayer *plane = [CALayer layer];
plane.bounds = CGRectMake(0, 0, spriteWidth, spriteHeight);
plane.position = CGPointMake(planeObj.x, planeObj.y);
plane.contents = (id)(sprite.CGImage);
CGAffineTransform rotateTransform = CGAffineTransformMakeRotation(planeObj.angle);
[plane setAffineTransform:rotateTransform];
[self.view.layer addSublayer:plane];
// Animate it
UIBezierPath *path = [UIBezierPath bezierPath];
[path moveToPoint:CGPointMake(100.0, 100.0)];
[path addLineToPoint:CGPointMake(200.0, 200.0)];
[path addLineToPoint:CGPointMake(100.0, 300.0)];
CAKeyframeAnimation *anim = [CAKeyframeAnimation animationWithKeyPath:#"position"];
anim.path = path.CGPath;
anim.rotationMode = kCAAnimationRotateAuto;
anim.repeatCount = HUGE_VALF;
anim.duration = 8.0;
anim.autoreverses = YES;
[plane addAnimation:anim forKey:#"race"];
}
What I'd like to do is generate UIBezierPath based off the angle of each plane and move it at the speed
but I don't think moveToPoint will help solve this
Thanks

Answer 1

I have a potental alternative solution which I am now using/working on;
// Angles for airplane icons
_sprite = [UIImage imageNamed:#"Plane"];
CGFloat spriteWidth = _sprite.size.width;
CGFloat spriteHeight = _sprite.size.height;
self.velocity=1.0;
//Random x&y points
CGFloat x;
CGFloat y;
//VICAirplane *plane1 = [[VICAirplane alloc] initWithX:48 withY:104 withAngle:0 withSpeed:10];
x = (CGFloat) (arc4random() % (int) self.view.frame.size.width);
y = (CGFloat) (arc4random() % (int) self.view.frame.size.height);
UIImageView *theBug = [[UIImageView alloc] initWithFrame:CGRectMake(x, y, spriteWidth, spriteHeight)];
[theBug setBackgroundColor:[UIColor redColor]];
[theBug setImage:_sprite];
[self.view addSubview:theBug];
double delayInSeconds = 1;
dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, (int64_t)(delayInSeconds * NSEC_PER_SEC));
dispatch_after(popTime, dispatch_get_main_queue(), ^(void){
//Calculate the angle to rotate
CGFloat newX = (CGFloat) (arc4random() % (int) self.view.frame.size.width);
CGFloat newY = (CGFloat) (arc4random() % (int) self.view.frame.size.height);
CGPoint rotateToLocation = CGPointMake(newX, newY);
theBug.layer.anchorPoint = CGPointMake(0.5, 0);
float angleToRotate = atan2f(theBug.transform.tx-newX, theBug.transform.ty - newY);
if (theBug.transform.tx < newX)
angleToRotate *= 1;
[UIView animateWithDuration:4
delay:0
options:UIViewAnimationOptionCurveLinear
animations:^{
theBug.transform = CGAffineTransformRotate(theBug.transform, angleToRotate);
} completion:^(BOOL finished) {
[UIView animateWithDuration:2
delay:0.0
options:UIViewAnimationOptionCurveLinear
animations:^{
theBug.center = rotateToLocation;
} completion:^(BOOL finished) {
NSLog(#"Finished");
}];
}];
});
This is my solution for the issue. Many thanks.