ios - CAKeyFrameAnimation 在重复之前延迟

Question

我有一个围绕路径设置动画的球图像。动画设置为永远重复，但为什么重复之间有延迟？

这是我的代码:

CGPathRef aPath;
aPath = CGPathCreateWithEllipseInRect(CGRectMake(0, 0, SIZE, SIZE), NULL);

[CATransaction begin];

arcAnimation = [CAKeyframeAnimation animationWithKeyPath: @"position"];
[arcAnimation setBeginTime:CACurrentMediaTime()];
[arcAnimation setDuration: 1.5];
[arcAnimation setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionLinear]];
[arcAnimation setAutoreverses: NO];
[arcAnimation setRepeatCount:HUGE_VALF];
arcAnimation.removedOnCompletion = NO;
arcAnimation.fillMode = kCAFillModeRemoved;
[arcAnimation setPath: aPath];
[ball.layer addAnimation: arcAnimation forKey: @"position"];
[CATransaction commit];
CFRelease(aPath);

Answer 1

试试这个:

[animation setCalculationMode:kCAAnimationPaced]