Question

我想使用Singleton来展示广告，但效果不佳。当我不使用Singleton并且只使用ViewController时，它运行良好。（可以通过“vampLoadStart”和“vampDidReceive”）

我该如何解决？

模式1：当我使用Singleton时（无法加载并显示广告）

VAMPAdReward.swift

import Foundation
import UIKit
import VAMP

class VAMPAdReward: NSObject,VAMPDelegate{

    static let sharedInstance = VAMPAdReward()

    var adReward:VAMP!

    override init() {
        super.init()

    }

    func loadAdReward(parentViewController: UIViewController) {
        adReward = VAMP()
        adReward.setPlacementId("26812") //test ID
        adReward.delegate = self
        adReward.setRootViewController(self)

    }

    func showAdReward(){
        if adReward.isReady() {
            print("show ad")
            adReward.show()
        }else{
            print("couldn't show ad")
        }
    }

    func vampLoadStart(_ placementId: String!, adnwName: String!) {
        print("start loading")
    }

    func vampDidReceive(_ placementId: String!, adnwName: String!) {
        print("finished loading")
    }
}

的ViewController

import UIKit

class ViewController: UIViewController {

    var adReward: VAMPAdReward!

    override func viewDidLoad() {
        super.viewDidLoad()

        self.view.backgroundColor = UIColor.white

        VAMPAdReward.sharedInstance.loadAdReward(parentViewController: self)

    }

    override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {


    super.touchesBegan(touches, with: event)

        //when touch screen, show Ad
        VAMPAdReward.sharedInstance.showAdReward()

    }
}

模式2：当我不使用Singleton时（可以加载和显示广告）

import UIKit
import VAMP

class ViewController: UIViewController, VAMPDelegate {

    var ad: VAMP!

    override func viewDidLoad() {
        super.viewDidLoad()

        self.view.backgroundColor = UIColor.white

        //load ad
        ad = VAMP()
        ad.setPlacementId("59755") //test ID
        ad.delegate = self
        ad.setRootViewController(self)
        ad.load()

    }

    override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
        super.touchesBegan(touches, with: event)

        ad.show()

    }

    func vampLoadStart(_ placementId: String!, adnwName: String!) {
        print("start loading") //through
    }

    func vampDidReceive(_ placementId: String!, adnwName: String!) {
        print("finished loading") //through
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

}

Answer 1

按照以下步骤完成单件类

// MARK: - Singleton

final class Singleton {

    // Can't init is singleton
    private init() { }

    // MARK: Shared Instance

    static let shared = Singleton()

    // MARK: Local Variable

    var emptyStringArray : [String] = []

}

Answer 2

单身的正确方法

func loadAdReward(parentViewController: UIViewController) {
    adReward = VAMP()
    adReward.setPlacementId("26812") //test ID
    adReward.delegate = self
    adReward.setRootViewController(parentViewController)
    adReward.load()
}

如何在Swift中制作Singleton

2 个答案: