Question

我有2个按钮button1和button2 当按下button1时，我必须获取url1，而当按下button2时，则在以下函数中获取url2

           func fetchXMLData() {
    XMLParserFactory.fetchData(url: "https://brwterrgn.ergwgw.com/etwtt.cms") { (listOfXMLVM, error) in

        print("Fetch xml data")
        if error == nil {
            self.listOfNewsVM = listOfXMLVM!
            self.tableView.reloadData()
        }
        else {
            print(error?.localizedDescription ?? "Error")
        }
    }
}
}

Answer 1

您可以尝试将url作为参数并将其从调用者位置更改

override func viewDidLoad() {
    super.viewDidLoad()

    // Do any additional setup after loading the view.

    fetchXMLData(url: "https://value.com/etwtt.cms")
}

func buttonAct(_ sender: UIButton) {
    fetchXMLData(url: "https://brwterrgn.ergwgw.com/etwtt.cms")
} 
func fetchXMLData(url:String) {
    XMLParserFactory.fetchData(url:url) { (listOfXMLVM, error) in

        print("Fetch xml data")
        if error == nil {
            self.listOfNewsVM = listOfXMLVM!
            self.tableView.reloadData()
        }
        else {
            print(error?.localizedDescription ?? "Error")
        }
    }
}

修改

class FirstVC: UIViewController {

    func showSecond(_ sender: UIButton) {

        let sec = //
        sec.delegate = self
        present/push(sec)

    }

    func fetchXMLData(url:String) { 
        XMLParserFactory.fetchData(url:url) { (listOfXMLVM, error) in

            print("Fetch xml data")
            if error == nil {
                self.listOfNewsVM = listOfXMLVM!
                self.tableView.reloadData()
            }
            else {
                print(error?.localizedDescription ?? "Error")
            }
        }
}


class SecondVC: UIViewController {

    weak var delegate:FirstVC?

    func buttonAct(_ sender: UIButton) {
        delegate?.fetchXMLData(url: "https://brwterrgn.ergwgw.com/etwtt.cms")
    }

}

Answer 2

向此fetchXMLData函数添加参数

func fetchXMLData(withUrl url: String)

还用此url变量替换

XMLParserFactory.fetchData(url: url)

现在，在每个IBAction调用中，此函数都将不同的url作为此方法的参数传递给

@IBAction func button1pressed(_ sender: UIButton) {
    fetchXMLData(withUrl: "url1.com")
}

@IBAction func button2pressed(_ sender: UIButton) {
    fetchXMLData(withUrl: "url2.com")
}

快速按下按钮时如何更改URL

2 个答案: