let rotation = CABasicAnimation.init(keyPath: "transform.rotation")
rotation.toValue = NSNumber(value: value)
let group = CAAnimationGroup()
group.duration = 0.125
group.animations = [rotation]
group.isRemovedOnCompletion = false
group.fillMode = .forwards
// 是否无限循环
group.repeatCount = HUGE
rightImg.layer.add(group, forKey: nil)
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