Swift练习小demo tableView 自定义cell 简单实用

import UIKit
class ViewController: UIViewController , UITableViewDataSource, UITableViewDelegate {
    var tableView : UITableView!
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        tableView = UITableView(frame: CGRect(x: 0, y: 30, width: self.view.bounds.size.width, height: self.view.bounds.size.height), style: UITableViewStyle.plain)
        
        tableView.delegate = self
        tableView.dataSource = self
        
        self.view .addSubview(tableView)
        
        tableView .register(GoodsTableViewCell.classForCoder(), forCellReuseIdentifier: "cell")
        
    }
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
    
    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return 20
    }
    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell1:GoodsTableViewCell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as! GoodsTableViewCell
        
        cell1.titleLable.text = String(indexPath.row)
        
        
        return cell1
        
    }
    func  tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
        print("\(indexPath.row)")
        
    }
    
}

import UIKit

class GoodsTableViewCell: UITableViewCell {
//    var titleLable : UILabel?
    
    
    override init(style: UITableViewCellStyle, reuseIdentifier: String?){
        
        super . init(style: style, reuseIdentifier: reuseIdentifier)
        
        self.contentView .addSubview(self.titleLable)
    }
    
    //懒加载label
        lazy var  titleLable:UILabel = {
            let  titleLable =  UILabel(frame:CGRect.init(x: 100, y: 0, width: 100, height: 30))
            print("----------888")
            titleLable.backgroundColor = .green
            titleLable.textAlignment = NSTextAlignment.center
            return titleLable
        
    }( )
    
    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    
    
    
    
    override func awakeFromNib() {
        super.awakeFromNib()
        // Initialization code
    }

    override func setSelected(_ selected: Bool, animated: Bool) {
        super.setSelected(selected, animated: animated)

        // Configure the view for the selected state
    }

}