将uiimage追加到uiimage数组中

Question

我希望下面的快速代码将显示在每个tableview单元格中的所有图像附加到数组中。在这种情况下，数组是emptyA。我试着在aDDBTn中做这个动作。我收到了一个编译错误

设arrayValues2 = collect.compactMap { UIImage($0.self.image) }

用compactMap。我只想在调用func时将这些图像附加到数组中。

import UIKit

class ViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {
    
    var emptyA = [UIImage]()
    var addBTN = UIButton()
    var tableView = UITableView()
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        setTableVIew()
        aDDBTn()
        
        
    }
    
    
    func setTableVIew(){
        
        
        addBTN.backgroundColor = .orange
        view.addSubview(addBTN)
        addBTN.addTarget(self, action: #selector(aDDBTn), for: .touchDown)
        
        
        let VCframe = view.frame
        let height = VCframe.height * 0.8
        let height2 = VCframe.height * 0.2
        let widthx = VCframe.width
        addBTN.frame = CGRect(x: 0, y: height, width: widthx, height: height2)
        
        tableView.frame = CGRect(x: 10, y: 0, width: widthx - 20, height: height)
        
        tableView.delegate = self
        tableView.dataSource = self
        view.addSubview(tableView)
        
        
        tableView.register(customtv.self, forCellReuseIdentifier: "cell")
    }
    
    
    
    var arr = [1,2,3,4]
    
    
    
    func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat { 118 }
    
    
    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return arr.count
    }
    
    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as! customtv
      
    
        return cell
    }

    @objc func aDDBTn(){

        
        let collect = (0..<arr.count).compactMap { (tableView.cellForRow(at: IndexPath(row: $0, section: 0)) as? customtv)?.lbl }
        let arrayValues2 = collect.compactMap { UIImage($0.self.image) }
        emptyA.append(contentsOf: arrayValues2)
        print("Empty Array" , emptyA)
    }
    
    
}
class customtv: UITableViewCell {
    lazy var backView : UIView = {
        let view = UIView(frame: CGRect(x: 10, y: 6, width: self.frame.width  , height: 110))
        view.backgroundColor = .green
        print(self.frame.width)
        return view
    }()
    
    
    
    override func layoutSubviews() {
        backView.clipsToBounds = true
        backView.frame =  CGRect(x: 0, y: 6, width: bounds.maxX  , height: 110)
        
        
    }
    lazy var lbl : UIImageView = {
        let press = UIImageView(frame: CGRect(x: 0, y: 3, width: 120 , height: 50))
        press.backgroundColor = .yellow
        press.image = UIImage(named: "a2")
        
        return press
    }()
    
    
    

    
    
    override func setSelected(_ selected: Bool, animated: Bool) {
        super.setSelected(animated, animated: true)
        addSubview(backView)
 
        backView.addSubview(lbl)

    }
}

Answer 1

collect的类型是基于以下行的[UIImageView]，因为lbl是UIImageView类型的

let collect = (0..<arr.count).compactMap { (tableView.cellForRow(at: IndexPath(row: $0, section: 0)) as? customtv)?.lbl }

因此，您可以通过image属性直接访问图像。只需更改以下一行

let arrayValues2 = collect.compactMap { UIImage($0.self.image) }

至

let arrayValues2 = collect.compactMap { $0.image }