How to set UIImageView zoom animation when the photo being changed - ios

Question

As title, I am beginner so i don't have idea to solve it.
In my code, it just have zoom animation when i turn on the emulator first time,
I want to have the zoom animation when each photo change,
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
NSArray *animationImages = [NSArray arrayWithObjects:[UIImage imageNamed:#"1.jpg"],
[UIImage imageNamed:#"2.jpg"],
[UIImage imageNamed:#"3.jpg"],
[UIImage imageNamed:#"4.jpg"],nil];
UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(10,10,300,300)];
imageView.animationImages = animationImages ;
imageView.animationRepeatCount = 0;
imageView.animationDuration= 12.0;
[imageView startAnimating];
[self.view addSubview:imageView];
imageView.frame = CGRectMake(150, 150, 20, 20);
CGPoint center = imageView.center;
[UIView animateWithDuration: 1.0f animations:^{
imageView.frame = CGRectMake(10, 10, 300, 300);
imageView.center = center;
}];
}
Thank you in advance for any assistance that can be provided here.

Answer 1

It's not the cleanest code to use animationImages if you want a zoom animation on each image transition. I would create my own custom UIView class to handle the transitions myself so the animations can be tightly synchronized with each transition. But, for the sake of answering your question with a quick unreliable hack, I will use a timer to run an animation at approximately the same frequency as the image transitions. Timers become less accurate over time due, so eventually the zoom effect no longer lines up with the image transitions.
#interface NameOfYourViewController ()
#property(nonatomic, strong) UIImageView* imageView;
#property(nonatomic, strong) NSTimer* imageTransitionTimer;
#property(nonatomic, assign) CGFloat imageScale;
- (void)animateImage;
#end
#implementation NameOfYourViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
NSArray *animationImages = [NSArray arrayWithObjects:[UIImage imageNamed:#"1.jpg"],
[UIImage imageNamed:#"2.jpg"],
[UIImage imageNamed:#"3.jpg"],
[UIImage imageNamed:#"4.jpg"],nil];
self.imageView = [[UIImageView alloc] initWithFrame:CGRectMake(10,10,300,300)];
selfimageView.animationImages = animationImages ;
self.imageView.animationRepeatCount = 0;
self.imageView.animationDuration= 12.0;
[self.imageView startAnimating];
[self.view addSubview:self.imageView];
self.imageScale = 1.0f;
self.imageTransitionTimer = [NSTimer scheduledTimerWithTimeInterval:imageView.animationDuration target:self selector:#selector(animateImage) userInfo:nil repeats:YES];
[self.imageTransitionTimer fire];
}
- (void)animateImage
{
[UIView
animateWithDuration:1.0
delay:0.0
options:0
animations:^void () {
self.imageView.transform = CGAffineTransformMakeScale(
self.imageScale,
self.imageScale
);
}
completion:^void(BOOL finished) {
self.imageScale += 0.3f;
}
}];
}
#end