ios - Swift Progress View 动画使进度条超过 100%

Question

当为 ProgressView 使用动画时，如果我让动画用完它会完全正常工作，但如果我尝试在动画仍在运行时再次运行此代码，它会将 100% 添加到当前栏并继续运行通过酒吧。图片应该以更合乎逻辑的方式解释情况。

进度从 1.0 (100%) 开始:

进度进行到一半:

代码再次运行，导致进度超过 100%，尽管它使用了正确的时间来完成。

这里是使用的代码:

self.progressView.setProgress(1.0, animated: false)
        
DispatchQueue.main.asyncAfter(deadline: .now() + 0.1) {
  UIView.animate(withDuration: 10, delay: 0, options: [.beginFromCurrentState, .allowUserInteraction], animations: { [unowned self] in
    self.progressView.setProgress(0, animated: true)
  })
}

提前致谢!

Answer 1

一些快速研究...

原来 UIProgressView 需要一点特别的努力来停止当前的动画。看看这是否适合您:

    // stop any current animation
    self.progressView.layer.sublayers?.forEach { $0.removeAllAnimations() }

    // reset progressView to 100%
    self.progressView.setProgress(1.0, animated: false)

    DispatchQueue.main.asyncAfter(deadline: .now() + 0.1) {
        // set progressView to 0%, with animated set to false
        self.progressView.setProgress(0.0, animated: false)
        // 10-second animation changing from 100% to 0%
        UIView.animate(withDuration: 10, delay: 0, options: [], animations: { [unowned self] in
            self.progressView.layoutIfNeeded()
        })
    }