iOS中UIImageView上的动画之间的延迟

Question

I have an animation which is made up of an array of images, on which I then run

[myUIImageView startAnimating]

I want the animation to run once, then stop for 3 seconds, then repeat.

I need to run this animation in a separate thread so I have

NSThread *animationThread = [[NSThread alloc] initWithTarget:self selector:@selector(startAnimTask) withObject:nil waitUntilDone:NO]; 
[animationThread start];

in my viewDidLoad, and then

-(void) startAnimTask {

   //create array of images here; animationDuration (3) and animationRepeatCount (1)
   [self setUpAnimation];

   while (true){
       [myUIImageView startAnimating];
       usleep(3);        
       [myUIImageView stopAnimating];
       usleep(3);    
   }
}

Using this method, I receive a memory warning. I've also tried running the start and stop on the MainThread with no luck.

Any ideas?

Answer 1

Do this:

 [myUIImageView startAnimating];
 [self performSelector:@selector(startAnimTask) 
         withObject:nil 
         afterDelay:(myUIImageView.animationDuration+3.0)];

Now selector is:

 -(void)startAnimTask
 {
   [myUIImageView startAnimating];
   //repeat again then add above selector code line here
 }

Answer 2

UI不是线程安全的，因此UI调用应仅在主线程中执行，也许是这种情况。

Answer 3

I think you can go with this:

  [self performSelector:@selector(startAnimTask) 
             withObject:nil 
             afterDelay:0.1];

  [self performSelector:@selector(startAnimTask) 
             withObject:nil 
             afterDelay:3.0];

In startAnimTask method write your animation logic code.

Enjoy Coding :)

Answer 4

Try this approach to complete your task:

[self performSelector:@selector(myTask) 
             withObject:nil 
             afterDelay:3.0];

-(void)myTask{

//Write your logic for animation

}