使用循環訪問多個子視圖（swift4）

Question

我下面的代碼聲明了var，然后將它們添加到views子視圖中，還聲明了約束。 我想看看是否仍然可以將這段代碼寫得更短。 使用view.addSubview（imageA）和imageA.translatesAutoresizingMaskIntoConstraints = false我想看看是否我可以添加所有的變量，所以像imageA，text，textBackward.addSubview（theName）

var imageA = UIImageView()
var text = UILabel()
var theName = UILabel()
var textForward = UIButton()
var textBackward = UIButton()
var map = UIButton()
var settings = UIButton()

override func viewDidLoad() {     
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.

    view.addSubview(imageA)
    view.addSubview(text)

    view.addSubview(theName)
    view.addSubview(textForward)
    view.addSubview(textBackward)
    view.addSubview(map)
     view.addSubview(settings)

    imageA.translatesAutoresizingMaskIntoConstraints = false
    text.translatesAutoresizingMaskIntoConstraints = false
    textBackward.translatesAutoresizingMaskIntoConstraints = false
    settings.translatesAutoresizingMaskIntoConstraints = false
    theName.translatesAutoresizingMaskIntoConstraints = false
    map.translatesAutoresizingMaskIntoConstraints = false

    textForward.translatesAutoresizingMaskIntoConstraints = false
  }

Answer 1

對我來說，我喜歡將所有屬性都放到Array中，並為每個閉包使用以在閉包內設置調用同一函數。

    var imageA = UIImageView()
    var text = UILabel()
    var theName = UILabel()
    var textForward = UIButton()
    var textBackward = UIButton()
    var map = UIButton()
    var settings = UIButton()

    lazy var collection = [imageA, text, theName, textForward, textBackward, map, settings]

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.

        collection.forEach { (view) in
            self.view.addSubview(view)
            view.translatesAutoresizingMaskIntoConstraints = false
        }
    }

如果有人使用情節提要和插座，還可以添加插座集合並鏈接所需的所有視圖。 出口集合

Answer 2

您可以在數組中添加所有子視圖並像這樣迭代

[imageA,text,theName,textForward,textBackward,map,settings].forEach({
            $0.translatesAutoresizingMaskIntoConstraints = false
            self.view.addSubview($0)
        })