Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
541 views
in Technique[技术] by (71.8m points)

ios - Conform to protocol in ViewController, in Swift

Trying to conform to UITableViewDataSource and UITableViewDelegate inside a Swift UIViewController subclass.

class GameList: UIViewController {

    var aTableView:UITableView = UITableView()

    override func viewDidLoad() {
        super.viewDidLoad()
        aTableView.delegate = self
        aTableView.dataSource = self
        self.view.addSubview(aTableView)
        //errors on both lines for not conforming
    }

}

Docs say you should conform on the class line after the : but that's usually where the superclass goes. Another : doesn't work. Using a comma separated list after the superclass also doesn't work

EDIT:

Also must adopt all required methods of each protocol, which I wasn't initially doing.

See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Reply

0 votes
by (71.8m points)

You use a comma:

class GameList: UIViewController, UITableViewDelegate, UITableViewDataSource {
    // ...
}

But realize that the super class must be the first item in the comma separated list.

If you do not adopt all of the required methods of the protocol there will be a compiler error. You must get all of the required methods!


与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
OGeek|极客中国-欢迎来到极客的世界,一个免费开放的程序员编程交流平台!开放,进步,分享!让技术改变生活,让极客改变未来! Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...