ios - 将项目插入数组时基于更新 UIimage

Question

我有 4 个 ImageView 。当我在 for, 数组中添加颜色时，第一个 ImageView 背景将根据内容发生变化。我的目标是每当我添加颜色时， ImageView 背景颜色都会改变。当我添加第一种颜色时，第一个 ImageView 会改变，第二个颜色，第二个 ImageView 会改变等等。
我怎么能做到呢？
通过创建 ImageView 的集合来实现它是可能的。

import UIKit

class ViewController: UIViewController {

    @IBOutlet weak var image1: UIImageView!
    @IBOutlet weak var image2: UIImageView!
    @IBOutlet weak var image3: UIImageView!
    @IBOutlet weak var image4: UIImageView!
    @IBOutlet var images: [UIImageView]!
    
    var colors = ["Green","Red"]
    var forms = [String]()
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view.
    }


    @IBAction func buttonPressed(_ sender: UIButton) {
        if let randomColor = colors.randomElement() {
            forms.append(randomColor)
            
                switch forms.last {
                case "Green":
                    image1.backgroundColor = #colorLiteral(red: 0.1960784346, green: 0.3411764801, blue: 0.1019607857, alpha: 1)
                    
                case "L":
                    
                    image1.backgroundColor = #colorLiteral(red: 0.521568656, green: 0.1098039225, blue: 0.05098039284, alpha: 1)
                default:
                    print("Unknow")
                
            }
            
        }
        
    }
    
}

Answer 1

下一张图片的索引是forms.count-1 .而不是将颜色分配给 image1 ，尝试设置images[forms.count-1]的颜色:

@IBAction func buttonPressed(_ sender: UIButton) {
    if let randomColor = colors.randomElement() {
        forms.append(randomColor)
        let index = forms.count - 1
        guard index < images.count else {
            // index out of bounds
            return
        }
        switch forms.last {
        case "Green":
            images[index].backgroundColor = #colorLiteral(red: 0.1960784346, green: 0.3411764801, blue: 0.1019607857, alpha: 1)    
        case "Red":
            images[index].backgroundColor = #colorLiteral(red: 0.521568656, green: 0.1098039225, blue: 0.05098039284, alpha: 1)
        default:
            print("Unknow")
            
        }
    }
}

更新:
要显示最后 4 项，请尝试以下代码片段:

@IBAction func buttonPressed(_ sender: UIButton) {
    if let randomColor = colors.randomElement() {
        forms.append(randomColor)
        if forms.count > images.count {
            forms.removeFirst()
        }
        for i in 0..<forms.count {
            switch forms[i] {
            case "Green":
                images[i].backgroundColor = #colorLiteral(red: 0.1960784346, green: 0.3411764801, blue: 0.1019607857, alpha: 1)
                
            case "Red":
                
                images[i].backgroundColor = #colorLiteral(red: 0.521568656, green: 0.1098039225, blue: 0.05098039284, alpha: 1)
            default:
                print("Unknow")
                
            }
        }
    }
}