如何設置顯式CA動畫延遲的最終值

Question

我有一個明確的動畫，我想設置最終值，以便對象停留在終點。但我怎麼能在延遲動畫上實現這一點：這裏是代碼：

CAKeyframeAnimation *moveAnimation = [CAKeyframeAnimation animationWithKeyPath:@"position"]; 
    moveAnimation.duration = 0.3; 
    moveAnimation.cumulative = YES; 
    moveAnimation.repeatCount = 1; 

    // Bounce 
    [moveAnimation setValues:[NSArray arrayWithObjects: 
         [NSValue valueWithCGPoint:[self getCoordinatePointForAnimationWithRadius:0 withIndex:i]], 
         [NSValue valueWithCGPoint:[self getCoordinatePointForAnimationWithRadius:radius + 10 withIndex:i]], 
         [NSValue valueWithCGPoint:[self getCoordinatePointForAnimationWithRadius:radius - 5 withIndex:i]], 
         [NSValue valueWithCGPoint:[self getCoordinatePointForAnimationWithRadius:radius withIndex:i]], nil]]; 

    [moveAnimation setKeyTimes:[NSArray arrayWithObjects: 
          [NSNumber numberWithFloat:0], 
          [NSNumber numberWithFloat:0.5], 
          [NSNumber numberWithFloat:0.75], 
          [NSNumber numberWithFloat:1.0], nil]]; 

    [moveAnimation setTimingFunctions:[NSArray arrayWithObjects: 
             [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseOut], nil]]; 



    moveAnimation.beginTime = CACurrentMediaTime() + 1 + (0.1 * i); 


    [layer addAnimation:opacityAnimation forKey:@"opacityAnimationUp"]; 
    [layer addAnimation:moveAnimation forKey:@"moveAnimationUp"]; 

// That's not working correctly because of the delay 
    [layer setOpacity:1.0]; 
    [layer setPosition:[self getCoordinatePointForAnimationWithRadius:radius withIndex:i]]; 

謝謝！來自德國

最好的問候， 克里斯

Answer 1

看起來缺少的是一個向後填補模式的唯一的事情。這將導致動畫在添加後立即顯示第一個值，即使實際動畫被延遲：

moveAnimation.fillMode = kCAFillModeBackwards;