swift spritekit Facebook分享按钮

Question

嘿，我的应用程序几乎准备好发布，但我想添加一个Facebook共享按钮。 事情是我不知道场景和viewcontroler之间的通信是如何工作的。 我做了我的研究，但只在obj-c中找到了像这样的代码

- (void)lkFaceBookShare {
    NSString *serviceType = SLServiceTypeFacebook;
    if (![SLComposeViewController isAvailableForServiceType:serviceType])
    {
        [self showUnavailableAlertForServiceType:serviceType];
    }
    else
    {
        SLComposeViewController *composeViewController = [SLComposeViewController composeViewControllerForServiceType:serviceType];
        UIWindow *keyWindow = [[UIApplication sharedApplication] keyWindow];
        CGRect rect = [keyWindow bounds];
        UIGraphicsBeginImageContextWithOptions(self.view.bounds.size, NO, 0.5f);
        [self.view drawViewHierarchyInRect:rect afterScreenUpdates:YES];
        UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();
        UIGraphicsEndImageContext();

        [composeViewController addImage:viewImage];
        NSString *initalTextString = [NSString stringWithFormat:@"Let's join together in the form of underground catch word go along with me!! Link: https://itunes.apple.com/us/app/uoi-hinh-bat-chu-gioi-duoi/id907330926?ls=1&mt=8"];
        [composeViewController setInitialText:initalTextString];
        UIViewController *vc = self.view.window.rootViewController;
        [vc presentViewController:composeViewController animated:YES completion:nil];
    }
}

- (void)showUnavailableAlertForServiceType:(NSString *)serviceType
{
    NSString *serviceName = @"";

    if (serviceType == SLServiceTypeFacebook)
    {
        serviceName = @"Facebook";
    }
    else if (serviceType == SLServiceTypeSinaWeibo)
    {
        serviceName = @"Sina Weibo";
    }
    else if (serviceType == SLServiceTypeTwitter)
    {
        serviceName = @"Twitter";
    }

    UIAlertView *alertView = [[UIAlertView alloc]
                              initWithTitle:@"Account"
                              message:[NSString stringWithFormat:@"Please go to the device settings and add a %@ account in order to share through that service", serviceName]
                              delegate:nil
                              cancelButtonTitle:@"Dismiss"
                              otherButtonTitles:nil];
    [alertView show];
}

我的经验和知识太低，太快​​，所以我需要一些帮助这个D：

谢谢

Answer 1

这是我之前为twitter做的一些代码，它仍然可以在swift中运行。 我将向您展示如何将其转换为Facebook。 把这个你的viewController：

func showTweetSheet() {
    let tweetSheet = SLComposeViewController(forServiceType: SLServiceTypeTwitter)
    tweetSheet.completionHandler = {
        result in
        switch result {
        case SLComposeViewControllerResult.Cancelled:
            //Add code to deal with it being cancelled
            break

        case SLComposeViewControllerResult.Done:
            //Add code here to deal with it being completed
            //Remember that dimissing the view is done for you, and sending the tweet to social media is automatic too. You could use this to give in game rewards?
            break
        }
    }

    tweetSheet.setInitialText("Test Twitter") //The default text in the tweet 
    tweetSheet.addImage(UIImage(named: "TestImage.png")) //Add an image if you like?
    tweetSheet.addURL(NSURL(string: "http://twitter.com")) //A url which takes you into safari if tapped on

    self.presentViewController(tweetSheet, animated: false, completion: {
        //Optional completion statement
        })
}

要将其转换为Facebook，只需将SLServiceTypeTwitter交换为SLServiceTypeFacebook并重命名变量以提高可读性。 如果要从SKScene调用此方法，则必须以某种方式警告viewController您希望它调用方法。

我首选的方法是使用NSNotificationCenter，以便我从场景发布一个警报，并由viewController接收它，以便它触发一个方法。 这也非常容易设置。 在场景中，您需要将这行代码放在您想要调用Facebook弹出窗口的任何位置：

NSNotificationCenter.defaultCenter().postNotificationName("WhateverYouWantToCallTheNotification", object: nil)

这会发出一个带有名称的通知。 现在，在viewController中，您需要通过将以下代码放在viewDidLoad，viewDidAppear或类似内容中来订阅此警报。

NSNotificationCenter.defaultCenter().addObserver(self, selector: "ThisIsTheMethodName", name: "WhateverYouCalledTheAlertInTheOtherLineOfCode", object: nil)

现在场景将与viewController进行通信，您将能够显示Facebook表格。 请记住用相对于项目的字符串替换我的字符串。 希望这会有所帮助 - 对不起，这是一个很长的答案！

Answer 2

func lkFaceBookShare() {
    var serviceType: String = SLServiceTypeFacebook
    if !SLComposeViewController.isAvailableForServiceType(serviceType) {
        self.showUnavailableAlertForServiceType(serviceType)
    }
    else {
        var composeViewController: SLComposeViewController = SLComposeViewController.composeViewControllerForServiceType(serviceType)
        var keyWindow: UIWindow = UIApplication.sharedApplication().keyWindow
        var rect: CGRect = keyWindow.bounds
        UIGraphicsBeginImageContextWithOptions(self.view.bounds.size, false, 0.5)
        self.view!.drawViewHierarchyInRect(rect, afterScreenUpdates: true)
        var viewImage: UIImage = UIGraphicsGetImageFromCurrentImageContext()
        UIGraphicsEndImageContext()
        composeViewController.addImage(viewImage)
        var initalTextString: String = String(format: "Let's join together in the form of underground catch word go along with me!! Link: https://itunes.apple.com/us/app/uoi-hinh-bat-chu-gioi-duoi/id907330926?ls=1&mt=8")
        composeViewController.initialText = initalTextString
        var vc: UIViewController = self.view.window.rootViewController
        vc.presentViewController(composeViewController, animated: true, completion: { _ in })
    }
}

func showUnavailableAlertForServiceType(serviceType: String) {
    var serviceName: String = ""
    if serviceType == SLServiceTypeFacebook {
        serviceName = "Facebook"
    }
    else if serviceType == SLServiceTypeSinaWeibo {
        serviceName = "Sina Weibo"
    }
    else if serviceType == SLServiceTypeTwitter {
        serviceName = "Twitter"
    }

    var alertView: UIAlertView = UIAlertView(title: "Account", message: "Please go to the device settings and add a \(serviceName) account in order to share through that service", delegate: nil, cancelButtonTitle: "Dismiss", otherButtonTitles: "")
    alertView.show()
}

Swift转换的Obj-C答案由一个非常有帮助的用户发布...... 原帖