我有一个记录“apache2 / mods-available”。我想列出'mods-available'中的元素，但只列出以'a'开头的文件，文件扩展名为'.conf'，每行列出一个文件。
我试过这样：
user$ ls *a && *.conf ./apache2/mods-available
它不起作用..任何想法？
答案 0 :(得分：0)
像这样：
import UIKit
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
self.view.backgroundColor = .darkGray
let size:CGFloat = 300.0
let centerPoint:CGFloat = 200.0
let valueLabel = UITextField()
valueLabel.isUserInteractionEnabled = false
valueLabel.contentVerticalAlignment = .center
valueLabel.textAlignment = .center
valueLabel.text = "300"
valueLabel.textColor = .black
valueLabel.font = UIFont.init(name: "HelveticaNeue-Medium", size: 100)
valueLabel.bounds = CGRect(x:0.0, y:0.0, width:size, height:size)
valueLabel.center = CGPoint(x:centerPoint, y:centerPoint)
let redCircle:CAShapeLayer = CAShapeLayer()
redCircle.path = UIBezierPath(ovalIn: valueLabel.bounds).cgPath
redCircle.fillColor = UIColor.red.cgColor
redCircle.strokeColor = UIColor.white.cgColor
redCircle.lineWidth = 10
valueLabel.layer.addSublayer(redCircle)
let whiteCircle:CAShapeLayer = CAShapeLayer()
let tmpRect = CGRect(x:valueLabel.bounds.origin.x,y:valueLabel.bounds.origin.x,width:valueLabel.bounds.width-80.0,height:valueLabel.bounds.height-80.0)
whiteCircle.path = UIBezierPath(ovalIn: tmpRect).cgPath
whiteCircle.fillColor = UIColor.white.cgColor
whiteCircle.strokeColor = UIColor.white.cgColor
whiteCircle.lineWidth = 10
let posX = valueLabel.bounds.midX - (size-80.0)/2.0
let posY = valueLabel.bounds.midY - (size-80.0)/2.0
whiteCircle.position = CGPoint(x:posX, y:posY)
valueLabel.layer.addSublayer(whiteCircle)
self.view.addSubview(valueLabel)
}
}