1没有注册
importUIKit
classViewController:UIViewController,UITableViewDelegate,UITableViewDataSource{
varnameArr = ["嘿嘿嘿","哈哈哈","啦啦啦","哈哈哈","啦啦啦","哈哈哈","啦啦啦","哈哈哈","啦啦啦","哈哈哈","啦啦啦","哈哈哈","啦啦啦","哈哈哈","啦啦啦","哈哈哈","啦啦啦"]
overridefuncviewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
let rectOne =CGRect(x:0, y:0, width:320, height:500)
lettableView =UITableView(frame: rectOne, style: .plain)
view.addSubview(tableView)
tableView.delegate=self
tableView.dataSource=self
}
functableView(_tableView:UITableView, numberOfRowsInSection section:Int) ->Int{
returnnameArr.count
}
functableView(_tableView:UITableView, cellForRowAt indexPath:IndexPath) ->UITableViewCell{
varcell =
tableView.dequeueReusableCell(withIdentifier:"reuse")as?TableViewCellOne
ifcell ==nil{
cell =TableViewCellOne(style: .default, reuseIdentifier:"reuse")
}
cell?.appNameLabel?.text=nameArr[indexPath.row]
returncell!
}
functableView(_tableView:UITableView, heightForRowAt indexPath:IndexPath) ->CGFloat{
return200
}
overridefuncdidReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
2.有注册
importUIKit
classViewController:UIViewController,UITableViewDelegate,UITableViewDataSource{
varnameArr = ["嘿嘿嘿","哈哈哈","啦啦啦","哈哈哈","啦啦啦","哈哈哈","啦啦啦","哈哈哈","啦啦啦","哈哈哈","啦啦啦","哈哈哈","啦啦啦","哈哈哈","啦啦啦","哈哈哈","啦啦啦"]
overridefuncviewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
letrectOne =CGRect(x:0, y:0, width:320, height:500)
lettableView =UITableView(frame: rectOne, style: .plain)
view.addSubview(tableView)
tableView.delegate=self
tableView.dataSource=self
tableView.register(TableViewCellOne.self, forCellReuseIdentifier:"reuse")
}
functableView(_tableView:UITableView, numberOfRowsInSection section:Int) ->Int{
returnnameArr.count
}
functableView(_tableView:UITableView, cellForRowAt indexPath:IndexPath) ->UITableViewCell{
letcell =
tableView.dequeueReusableCell(withIdentifier:"reuse")as!TableViewCellOne
cell.appNameLabel?.text=nameArr[indexPath.row]
returncell
}
functableView(_tableView:UITableView, heightForRowAt indexPath:IndexPath) ->CGFloat{
return200
}
overridefuncdidReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.}
}
总结:区别就是有注册的时候多这句代码tableView.register(TableViewCellOne.self, forCellReuseIdentifier:"reuse”),并且在cell方法里用letcell =
tableView.dequeueReusableCell(withIdentifier:"reuse")as!TableViewCellOne
cell.appNameLabel?.text=nameArr[indexPath.row]
returncell
as后是!号,第二句cell后不加?号,第三句cell后没有!
再看cell类里
importUIKit
classTableViewCellOne:UITableViewCell{
varpictureImageView:UIImageView?
varappNameLabel:UILabel?
requiredinit?(coder aDecoder:NSCoder) {
super.init(coder: aDecoder)!
}
overrideinit(style:UITableViewCellStyle, reuseIdentifier:String?) {
super.init(style: style, reuseIdentifier: reuseIdentifier)
//overrideinit后没有代码提示,是手打,super.init后有代码提示
createVeiw()
//创建视图
}
funccreateVeiw() {
appNameLabel=UILabel.init()
appNameLabel?.backgroundColor=UIColor.cyan
appNameLabel?.frame=CGRect(x:20, y:0, width:self.frame.size.width-40, height:30)
self.addSubview(appNameLabel!)
pictureImageView=UIImageView()
pictureImageView?.frame=CGRect(x:10, y:40, width:self.frame.size.width-20, height:150)
pictureImageView?.image=UIImage.init(named:"33.jpg")
self.contentView.addSubview(pictureImageView!)
}
// override func layoutSubviews() {
// super.layoutSubviews()
//
// }
overridefuncawakeFromNib() {
super.awakeFromNib()
// Initialization code
}
overridefuncsetSelected(_selected:Bool, animated:Bool) {
super.setSelected(selected, animated: animated)
// Configure the view for the selected state
}
}
