Swift - 进度条(UIProgressView)的用法
1,创建进度条
2,设置进度,同时有动画效果
3,改变进度条颜色
let progressView = UIProgressView(progressViewStyle: .default) progressView.center = self.view.center progressView.progress = 0.5 //默认进度50% self.view.addSubview(progressView)

progressView.setProgress(0.8, animated:true)
progressView.progressTintColor = UIColor.green //已有进度颜色 progressView.trackTintColor = UIColor.blue //剩余进度颜色(即进度槽颜色)
航哥,为什么会报错:Expected declaration
UIProgressView不能调节宽高吗?难道只能重新写?