HorizontalProgress 在swift中动画无法执行..

[ench44]

不知道为什么, 求解....

var horizontalProgressView : HorizontalProgressView!

override func viewDidLoad() {
    super.viewDidLoad()
    horizontalProgressView = HorizontalProgressView()
    
    horizontalProgressView.frame = CGRect(x: 20, y: 40, width: self.view.bounds.width-40, height: 100)
    horizontalProgressView.progressLevelArray = ["Lv1", "Lv2", "Lv3", "Lv4", "Lv5"]
    horizontalProgressView.lineMaxHeight = 4
    horizontalProgressView.pointMaxRadius = 6
    horizontalProgressView.currentLevel = 3
    horizontalProgressView.animationDuration = 3
    horizontalProgressView.textPosition = .bottomPosition
    
    
    self.view.addSubview(horizontalProgressView)
    
    horizontalProgressView.startAnimation()
}

把执行动画的方法放进 viewwillappear 中也不行...