[iphone] animationDidStop 델리게이트 내에서 CAAnimation을 식별하는 방법은 무엇입니까?

일련의 겹치는 CATransition / CAAnimation 시퀀스가있는 문제가있었습니다.이 시퀀스는 모두 애니메이션이 중지되었을 때 사용자 지정 작업을 수행해야했지만 animationDidStop에 대한 하나의 델리게이트 핸들러 만 원했습니다.

그러나 문제가 있었는데 animationDidStop 델리게이트에서 각 CATransition / CAAnimation을 고유하게 식별하는 방법이없는 것 같습니다.

CAAnimation의 일부로 노출 된 키 / 값 시스템을 통해이 문제를 해결했습니다.

애니메이션을 시작할 때 CATransition / CAAnimation에서 setValue 메서드를 사용하여 animationDidStop이 실행될 때 사용할 식별자와 값을 설정합니다.

-(void)volumeControlFadeToOrange
{
    CATransition* volumeControlAnimation = [CATransition animation];
    [volumeControlAnimation setType:kCATransitionFade];
    [volumeControlAnimation setSubtype:kCATransitionFromTop];
    [volumeControlAnimation setDelegate:self];
    [volumeControlLevel setBackgroundImage:[UIImage imageNamed:@"SpecialVolume1.png"] forState:UIControlStateNormal];
    volumeControlLevel.enabled = true;
    [volumeControlAnimation setDuration:0.7];
    [volumeControlAnimation setValue:@"Special1" forKey:@"MyAnimationType"];
    [[volumeControlLevel layer] addAnimation:volumeControlAnimation forKey:nil];
}

- (void)throbUp
{
    doThrobUp = true;

    CATransition *animation = [CATransition animation];
    [animation setType:kCATransitionFade];
    [animation setSubtype:kCATransitionFromTop];
    [animation setDelegate:self];
    [hearingAidHalo setBackgroundImage:[UIImage imageNamed:@"m13_grayglow.png"] forState:UIControlStateNormal];
    [animation setDuration:2.0];
    [animation setValue:@"Throb" forKey:@"MyAnimationType"];
    [[hearingAidHalo layer] addAnimation:animation forKey:nil];
}

animationDidStop 대리자에서 :

- (void)animationDidStop:(CAAnimation *)theAnimation finished:(BOOL)flag{

    NSString* value = [theAnimation valueForKey:@"MyAnimationType"];
    if ([value isEqualToString:@"Throb"])
    {
       //... Your code here ...
       return;
    }


    if ([value isEqualToString:@"Special1"])
    {
       //... Your code here ...
       return;
    }

    //Add any future keyed animation operations when the animations are stopped.
 }

이것의 다른 측면은 델리게이트 클래스에 저장하는 대신 키 값 페어링 시스템에서 상태를 유지할 수 있다는 것입니다. 코드가 적을수록 좋습니다.

Key Value Pair Coding에 대한 Apple Reference 를 확인하십시오 .

animationDidStop 델리게이트에서 CAAnimation / CATransition 식별을위한 더 나은 기술이 있습니까?

감사합니다. -Batgar

답변

[[hearingAidHalo layer] addAnimation:animation forKey:@"Throb"];

if (theAnimation == [[hearingAidHalo layer] animationForKey:@"Throb"]) ...

typedef void (^animationCompletionBlock)(void);

#define kAnimationCompletionBlock @"animationCompletionBlock"

animationCompletionBlock theBlock = ^void(void)
{
  //Code to execute after the animation completes goes here    
};
[theAnimation setValue: theBlock forKey: kAnimationCompletionBlock];

- (void)animationDidStop:(CAAnimation *)theAnimation finished:(BOOL)flag
{
  animationCompletionBlock theBlock = [theAnimation valueForKey: kAnimationCompletionBlock];
  if (theBlock)
    theBlock();
}

CAAnimation *anim = ...
anim.removedOnCompletion = NO;

[myAnimation1 setValue:@"animation1" forKey:@"animationID"];

[myAnimation2 setValue:@"animation2" forKey:@"animationID"];

- (void)animationDidStop:(CAAnimation *)animation finished:(BOOL)flag
{
    if([[animation valueForKey:@"animationID"] isEqual:@"animation1"]) {
    //animation is animation1

    } else if([[animation valueForKey:@"animationID"] isEqual:@"animation2"]) {
    //animation is animation2

    } else {
    //something else
    }
}

 - (void)animationDidStop:(CAAnimation*)animation finished:(BOOL)flag 

private struct AnimationKeys {
    static let animationType = "animationType"
    static let volumeControl = "volumeControl"
    static let throbUp = "throbUp"
}

volumeControlAnimation.setValue(AnimationKeys.volumeControl, forKey: AnimationKeys.animationType)

throbUpAnimation.setValue(AnimationKeys.throbUp, forKey: AnimationKeys.animationType)

override func animationDidStop(anim: CAAnimation, finished flag: Bool) {
    if let value = anim.valueForKey(AnimationKeys.animationType) as? String {
        if value == AnimationKeys.volumeControl {
            //Do volumeControl handling
        } else if value == AnimationKeys.throbUp {
            //Do throbUp handling
        }
    }
}