将子视图添加到堆栈视图以设置背景颜色的函数或类

Posted 2023-02-27

【中文标题】将子视图添加到堆栈视图以设置背景颜色的函数或类

【英文标题】：Function or class to add subview to Stack view to set background color

【发布时间】：2017-10-15 13:00:13

【问题描述】：

我正在创建一个输入表单，每个输入行（标签和文本字段）都是通过使用堆栈视图排列的。我试图为特定的堆栈视图添加白色背景颜色。我已经实现了，但是努力将其创建为一个函数或类，以便更轻松地控制哪些堆栈视图来获取背景。

关于将其转换为我可以在整个项目中使用的函数或类的任何提示？ （注意：当前的解决方案，只为最后一个堆栈视图添加背景色，而不是全部......尚未修复......）

 import UIKit
 import Firebase

class createActivityVC: UIViewController 

override func viewDidLoad() 
    super.viewDidLoad()

    // runs the functions to add backgrounds to the stackviews

    pinBackground(backgroundView, to: nameStackView)
    pinBackground(backgroundView, to: typeStackView)
    pinBackground(backgroundView, to: weaponStackView)
    pinBackground(backgroundView, to: killStackView)
    pinBackground(backgroundView, to: sightingsStackView)
    pinBackground(backgroundView, to: noteStackView)

    // Do any additional setup after loading the view.


// Outlets used to set bacground color
@IBOutlet weak var nameStackView: UIStackView!
@IBOutlet weak var typeStackView: UIStackView!
@IBOutlet weak var weaponStackView: UIStackView!
@IBOutlet weak var killStackView: UIStackView!
@IBOutlet weak var sightingsStackView: UIStackView!
@IBOutlet weak var noteStackView: UIStackView!

// Normal outlets
@IBOutlet weak var name: UITextField! // required
@IBOutlet weak var type: UITextField! // required - type of hunt
@IBOutlet weak var weapon: UITextField! // required - weapon name
@IBOutlet weak var kills: UITextField! // optional (eg. 1)
@IBOutlet weak var sightings: UITextField! // optional (eg. 2)
@IBOutlet weak var note: UITextField! // optional short description of the hunt

@IBOutlet weak var saveBtn: UIButton!
@IBOutlet weak var cancelBtn: UIButton!



@IBAction func saveBtnWasPressed(_ sender: Any) 
    if name.text != nil && type.text != nil && weapon.text != nil 
        saveBtn.isEnabled = false // disabled the btn while uploading data - this ensure that user can't send the form twice

        DataService.instance.uploadPost(uid: (Auth.auth().currentUser?.uid)!, name: name.text!, type: type.text!, weapon: weapon.text!, kills: kills.text!, sightings: sightings.text!, note: note.text!,  withGroupKey: nil, sendComplete: 
            (isComplete) in
        if isComplete 
            self.saveBtn.isEnabled = true
            self.dismiss(animated: true, completion: nil)

         else 
            self.saveBtn.isEnabled = true
            print("There was an error with uploading the activity")
        

        )


    


@IBAction func cancelBtnWasPressed(_ sender: Any) 
    self.dismiss(animated: true, completion: nil)



private lazy var backgroundView: UIView = 
    let view = UIView()
    view.backgroundColor = .white
    return view
()

private func pinBackground(_ view: UIView, to stackView: UIStackView) 
    view.translatesAutoresizingMaskIntoConstraints = false
    stackView.insertSubview(view, at: 0)
    view.pin(to: stackView)




public extension UIView 
public func pin(to view: UIView) 
    NSLayoutConstraint.activate([
        leadingAnchor.constraint(equalTo: view.leadingAnchor),
        trailingAnchor.constraint(equalTo: view.trailingAnchor),
        topAnchor.constraint(equalTo: view.topAnchor),
        bottomAnchor.constraint(equalTo: view.bottomAnchor)
        ])

这就是现在的样子..

【参考方案1】：

这里是代码。您可以将背景颜色添加到任何堆栈视图。 您可以向 stackview 添加颜色，如

typeStackView.addBackground(color:.white)
    
extension UIStackView 
        func addBackground(color: UIColor) 
        let subView = UIView(frame: bounds)
        subView.backgroundColor = color
        subView.autoresizingMask = [.flexibleWidth, .flexibleHeight]
        insertSubview(subView, at: 0)
    

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