CAAnimation確定哪個動畫是

Question

我有每一個不同的路徑給它3 CAShapeLayer，但三個層的施加了相同的動畫，那就是：

[self animateToLineLayer:self.leftDottedLine_ withKey:@"leftLineAnimated"]; 

    - (void) animateToLineLayer:(CAShapeLayer *) line withKey:(NSString *) key 
    { 
     CABasicAnimation *pathAnimation = [CABasicAnimation animationWithKeyPath:@"strokeEnd"]; 
     [pathAnimation setFromValue:[NSNumber numberWithFloat:0.0f]]; 
     [pathAnimation setToValue:[NSNumber numberWithFloat:1.0f]]; 
     [pathAnimation setDuration:10.0]; 
     [pathAnimation setDelegate:self]; 
     [pathAnimation setFillMode:kCAFillModeForwards]; 
     [line addAnimation:pathAnimation forKey:key]; 
    } 

    then I try to find this animation back by doing: 

    - (void)animationDidStop:(CAAnimation *)animation finished:(BOOL)flag 
    { 
     if (animation == [self.leftDottedLine_ animationForKey:@"strokeEnd"]) { 
      NSLog(@"DONE"); 
     } 

     if (![self.leftDottedLine_ isNotNull]){ 
      NSLog(@"NIL"); 
     } 

     NSLog(@"JUST DONE"); 
    } 

但問題是，它從未打印完成！爲什麼是這樣？

Answer 1

你可能想在這裏看看關於如何在animationDidStop委託鑑定的動畫提示： How to identify CAAnimation within the animationDidStop delegate?

你確定你自己設定的委託？另外，也許==不起作用。嘗試使用isEqualTo：或上述鏈接中所述的字符串比較。