Question

我有三个CAShapeLayer，每个都有不同的路径，但是这三个层应用了相同的动画，即：

 [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");
    }

但问题是它永远不会打印完成！这是为什么？

Answer 1

您可能需要查看有关如何在animationDidStop委托中识别动画的提示： How to identify CAAnimation within the animationDidStop delegate?

您确定将自己设为代表吗？此外，也许==不起作用。尝试isEqualTo：或上面链接中所述的字符串比较。

CAAnimation确定哪个动画是哪个

1 个答案: