TableViewCell提供了種種定製的可能,包括textLabel,detailLabel,各種訪問附件等。但是需要死記硬背,何必呢,反正一個繼承了UITableViewCell的子類,然後在其內加入自己的定製View其實並不複雜,並且使用了同樣的加入subView的方案。因此,我常常更加傾向於使用這樣的類。因為更加通用,並且更加靈活,因為,你想要的任何檢視和它們自己組合的佈局,都是可以自由定義的。
如下案例,就是一個使用繼承子類方案的TableView:
import UIKit
@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
var window: UIWindow?
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
self.window = UIWindow(frame: UIScreen.main.bounds)
let page = Page()
page.view.backgroundColor = .blue
self.window!.rootViewController = page
self.window?.makeKeyAndVisible()
return true
}
}
class Table: UITableView,UITableViewDataSource{
let arr = ["Long text Long text
Long text Long text Long text Long text Long text Long text Long text ","delphi"]
let MyIdentifier = "cell"
override init(frame: CGRect, style: UITableViewStyle) {
super.init(frame:frame,style:style)
self.dataSource = self
self.register(Cell.self, forCellReuseIdentifier: MyIdentifier)
}
required init?(coder aDecoder: NSCoder) {
super.init(coder:aDecoder)
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return arr.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let a = tableView.dequeueReusableCell(withIdentifier: MyIdentifier) as! Cell
a.view1.text = String(arr[indexPath.row])
return a
}
}
class Cell : UITableViewCell{
var view1 = UILabel()
override func layoutSubviews() {
self.contentView.addSubview(view1)
self.contentView.translatesAutoresizingMaskIntoConstraints = false
view1.translatesAutoresizingMaskIntoConstraints = false
let views = ["view1":view1]
let hConstraint=NSLayoutConstraint.constraints(withVisualFormat: "H:|-[view1]-|", options: NSLayoutFormatOptions(rawValue: 0), metrics: nil, views: views)
self.contentView.addConstraints(hConstraint)
let vConstraint=NSLayoutConstraint.constraints(withVisualFormat: "V:|-[view1]-|", options: NSLayoutFormatOptions(rawValue: 0), metrics: nil, views: views)
self.contentView.addConstraints(vConstraint)
}
}
class Page: UIViewController {
var a : Table!
override func viewDidLoad() {
super.viewDidLoad()
a = Table()
a.frame = CGRect(x: 0,y: 30,width: 300,height: 400)
self.view.addSubview(a)
a.estimatedRowHeight = 44.0
a.rowHeight = UITableViewAutomaticDimension
}
}複製程式碼