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将函数从一个ViewController调用到另一个ViewController

swift4 oop swift ios

-1

sk123 · 技术社区 · 8 年前

我有两个函数,我想在另一个函数中调用 ViewController .我不想在另一个 Viewcontroller .我已尝试创建 视图控制器 对象并调用这两个方法,但不断出现崩溃。我还尝试扩展 UIViewController 但运气不好。我怎么能继续

import UIKit
import WebKit

class PrivacyPolicyController: UIViewController, WKUIDelegate {

    var webView: WKWebView!

    override func loadView() {
        super.loadView()
        createWebView()
    }

    override func viewDidLoad() {
        super.viewDidLoad()
        loadURL(url: "https://www.apple.com")
    }

    func loadWebView() {
        let webConfiguration = WKWebViewConfiguration()
        webView = WKWebView(frame: .zero, configuration: webConfiguration)
        webView.uiDelegate = self
        view = webView

    }

    func loadURL(url: String) {
        guard let myURL = URL(string: url) else { return }
        let myRequest = URLRequest(url: myURL)
        webView.load(myRequest)
    }
}

我想打电话 loadURL loadWebView 在这方面的作用 视图控制器

导入UIKit 导入WebKit

class TermsAndConditionsController: UIViewController{

    override func loadView() {
        super.loadView()
    }

    override func viewDidLoad() {
        super.viewDidLoad()

    }
}

这个 视图控制器 执行操作的位置

import UIKit

class WelcomeViewController: UIViewController {

    @IBAction func termsAndConditionsTapped(_ sender: UIButton) {
        let termsAndConditions = TermsAndConditionsController()
        self.navigationController?.pushViewController(termsAndConditions, animated: true)
    }

    @IBAction func privacyPolicyTapped(_ sender: UIButton) {
        let privacyPolicy = PrivacyPolicyController()
        self.navigationController?.pushViewController(privacyPolicy, animated: true)
    }

}

2 回复 | 直到 8 年前

rodskagg 8 年前

正如我在评论中所写的,对隐私策略和T&使用相同的viewcontroller;C:

import UIKit
import WebKit

class MyWebViewController: UIViewController {

    var webView: WKWebView!
    override func viewDidLoad() {
        super.viewDidLoad()
    }

    func loadWebView() {
        let webConfiguration = WKWebViewConfiguration()
        self.webView = WKWebView(frame: .zero, configuration: webConfiguration)
        self.view.addSubview(self.webView)
        webView.translatesAutoresizingMaskIntoConstraints = false
        webView.leadingAnchor.constraint(equalTo: self.view.leadingAnchor).isActive = true
        webView.topAnchor.constraint(equalTo: self.view.topAnchor).isActive = true
        webView.trailingAnchor.constraint(equalTo: self.view.trailingAnchor).isActive = true
        webView.bottomAnchor.constraint(equalTo: self.view.bottomAnchor).isActive = true
    }

    func loadURL(url: String) {
        guard let myURL = URL(string: url) else { return }
        let myRequest = URLRequest(url: myURL)
        if (self.webView == nil) {
            self.loadWebView()
        }
        self.webView.load(myRequest)
    }

}

然后:

import UIKit

class MakeItHappenViewController: UIViewController {

    @IBAction func termsAndConditionsTapped(_ sender: UIButton) {
        let termsAndConditions = MyWebViewController()
        self.navigationController?.pushViewController(termsAndConditions, animated: true)
        termsAndConditions.loadURL("http://someurl.com")
    }

    @IBAction func privacyPolicyTapped(_ sender: UIButton) {
        let privacyPolicy = MyWebViewController()
        self.navigationController?.pushViewController(privacyPolicy, animated: true)
        privacyPolicy.loadURL("http://someotherurl.com")
    }

}

Kunal_D 8 年前

可以为此创建基类(继承UIViewController),并使两个视图控制器都继承基类。这样,您就可以在两个类中都有这两个方法,并且只需调用它们

    Class BaseClass: UIViewController{
 var webView: WKWebView
 func loadWebView() {
      let webConfiguration = WKWebViewConfiguration()
      webView = WKWebView(frame: .zero, configuration: webConfiguration)
     webView.uiDelegate = self
}

func loadURL(url: String) {
    guard let myURL = URL(string: url) else { return }
    let myRequest = URLRequest(url: myURL)
    webView.load(myRequest)
}}

基类现在拥有为web视图创建、添加和重新加载url所需的所有方法。现在是视图控制器类。

Class PrivacyPolicyController: BaseClass, WKUIDelegate {func methodWhereYouwantToCallWebviewMthods(){
 self.loadWebView()
 self.loadURL()
 self.view = self.webView}}

其他班级也一样

class TermsAndConditionsController: BaseClass{func methodWhereYouwantToCallWebviewMthods(){
 self.loadWebView()
 self.loadURL()
 self.view = self.webView}
override func loadView() {
    super.loadView()
}

override func viewDidLoad() {
    super.viewDidLoad()

}}