相关疑难解决方法(0)

要将用户推送到iTunes商店以获取所需的项目,我正在使用以下功能:

func openStoreProductWithiTunesItemIdentifier(identifier: String) {

    let storeViewController = SKStoreProductViewController()
    storeViewController.delegate = self

    let parameters = [ SKStoreProductParameterITunesItemIdentifier : identifier, SKStoreProductParameterAffiliateToken : ITUNES_AFFILIATE_ID]
    storeViewController.loadProductWithParameters(parameters) { [weak self] (loaded, error) -> Void in
        if loaded {

            self!.navigationController?.pushViewControllerWithHandler(storeViewController, animated: true) {

                LilithProgressHUD.hide() // custom progress hud
            }
        }
    }
}

extension UINavigationController {

    func pushViewControllerWithHandler(viewController: UIViewController, animated: Bool, completion: Void -> Void) {

        CATransaction.begin()
        CATransaction.setCompletionBlock(completion)
        pushViewController(viewController, animated: animated)
        CATransaction.commit()
    }
}

叫做

let trackID = "thisIsMyTrackID"
openStoreProductWithiTunesItemIdentifier(trackID)

这导致了

如果我不是:

self!.navigationController?.pushViewControllerWithHandler(storeViewController, animated: true) { …