请考虑以下动画:
CABasicAnimation *pathAnimation = [CABasicAnimation animationWithKeyPath:@"strokeEnd"];
pathAnimation.duration = 1.0;
pathAnimation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseOut];
pathAnimation.fromValue = [NSNumber numberWithFloat:0.0f];
pathAnimation.toValue = [NSNumber numberWithFloat:1.0f];
pathAnimation.removedOnCompletion = NO;
pathAnimation.delegate = self;
这将基本上为从一端到下一端的图层绘制动画.问题是,一旦动画完成,该strokeEnd属性将重置为0(最初设置的位置).如何使最终值"坚持"？
我试图在animationDidStop委托方法中更改它.这大部分都有效,但strokeEnd即使放入CATransaction以禁用动画,也可能会暂时导致0 闪烁.我也玩过additive和cumulative属性无济于事.有什么建议？