先给大家展示下效果图，如果大家感觉还不错，请参考实现代码。

效果图如下所示：

源码

https://github.com/YouXianMing/Swift-Animations

? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 // // MixedColorProgressViewController.swift // Swift-Animations // // Created by YouXianMing on 16/8/21. // Copyright © 2016年 YouXianMing. All rights reserved. // import UIKit class MixedColorProgressViewController: NormalTitleViewController { private var upView : UIView! private var upLabel : UILabel! private var downView : UIView! private var downLabel : UILabel! private var timer : GCDTimer! = GCDTimer(inQueue: GCDQueue.mainQueue) override func setup() { super.setup() downView = UIView(frame: CGRectMake(0, 0, 220, 17)) downView.center = (contentView?.middlePoint)! downView.layer.cornerRadius = 2 downView.backgroundColor = UIColor.whiteColor() downView.layer.masksToBounds = true contentView?.addSubview(downView) downLabel = UILabel(frame: downView.bounds) downLabel.font = UIFont.HelveticaNeueThin(12.0) downLabel.text = "YouXianMing - iOS Programmer" downLabel.textColor = UIColor.redColor() downLabel.textAlignment = .Center downView.layer.borderWidth = 0.5 downView.layer.borderColor = UIColor.redColor().CGColor downView.addSubview(downLabel) upView = UIView(frame: CGRectMake(0, 0, 220, 17)) upView.center = (contentView?.middlePoint)! upView.layer.cornerRadius = 2 upView.backgroundColor = UIColor.redColor() upView.layer.masksToBounds = true contentView?.addSubview(upView) upLabel = UILabel(frame: upView.bounds) upLabel.font = UIFont.HelveticaNeueThin(12.0) upLabel.text = "YouXianMing - iOS Programmer" upLabel.textColor = UIColor.whiteColor() upLabel.textAlignment = .Center upView.addSubview(upLabel) weak var wself = self timer.event({ UIView.animateWithDuration(0.5, delay: 0, usingSpringWithDamping: 3, initialSpringVelocity: 0, options: .CurveEaseInOut, animations: { wself?.upView.width = CGFloat(arc4random() % 220) }, completion: nil) }, timeIntervalWithSeconds: 1, delayWithSeconds: 1) timer.start() } }

以上所述是小编给大家介绍的Swift中通过叠加UILabel实现混合进度条的方法，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对服务器之家网站的支持！

原文链接：http://www.cnblogs.com/YouXianMing/archive/2016/08/21/5793549.html