【Swift】 應用內顯示 AppStore 某個應用的詳情


 

 

前言

  應用內跳轉到 AppStore 的文章很多,一般都是用 SKStoreProductViewController 來實現的,不知道有沒有在意一個問題:打開很慢!!怎么忍?!

 

聲明
  歡迎轉載,但請保留文章原始出處:)
  博客園:http://www.cnblogs.com
  農民伯伯: http://over140.cnblogs.com

 

正文

  一般網上的文章的代碼:

    func openAppStore(url: String){
        if let number = url.rangeOfString("[0-9]{9}", options: NSStringCompareOptions.RegularExpressionSearch) {
            let appId = url.substringWithRange(number)
            let productView = SKStoreProductViewController()
            productView.delegate = self
            productView.loadProductWithParameters([SKStoreProductParameterITunesItemIdentifier : appId], completionBlock: { [weak self](result: Bool, error: NSError?) -> Void in
                if result {
                    self?.presentViewController(productView, animated: true, completion: nil)
                } else {
                    self?.openAppUrl(url)
                }
            })
        } else {
            openAppUrl(url)
        }
    }
    
    private func openAppUrl(url: String) {
        let nativeURL = url.stringByReplacingOccurrencesOfString("https:", withString: "itms-apps:")
        if UIApplication.sharedApplication().canOpenURL(NSURL(string:nativeURL)!) {
            UIApplication.sharedApplication().openURL(NSURL(string:url)!)
        }
    }
    
    func productViewControllerDidFinish(viewController: SKStoreProductViewController) {
        viewController.dismissViewControllerAnimated(true, completion: nil)
    }

    實現的效果很好,就是很慢,點擊按鈕調用 openAppStore 要很久才能顯示出界面,就算加一個轉圈效果也很差。原因是因為要去  linkmaker.itunes.apple.com 根據 identifier 查找鏈接,仔細看代碼我們會發現 presentViewController 是在查找到結果才被調用,其實我們可以不用讓界面現出來,雖然時間是一樣的,但是用戶體驗會很好,修改后代碼如下:

    func openAppStore(url: String){
        if let number = url.rangeOfString("[0-9]{9}", options: NSStringCompareOptions.RegularExpressionSearch) {
            let appId = url.substringWithRange(number)
            let productView = SKStoreProductViewController()
            productView.delegate = self
            productView.loadProductWithParameters([SKStoreProductParameterITunesItemIdentifier : appId], completionBlock: { [weak self](result: Bool, error: NSError?) -> Void in
                if !result {
                    productView.dismissViewControllerAnimated(true, completion: nil)
                    self?.openAppUrl(url)
                }
            })
            self.presentViewController(productView, animated: true, completion: nil)
        } else {
            openAppUrl(url)
        }
    }
    
    private func openAppUrl(url: String) {
        let nativeURL = url.stringByReplacingOccurrencesOfString("https:", withString: "itms-apps:")
        if UIApplication.sharedApplication().canOpenURL(NSURL(string:nativeURL)!) {
            UIApplication.sharedApplication().openURL(NSURL(string:url)!)
        }
    }
    
    func productViewControllerDidFinish(viewController: SKStoreProductViewController) {
        viewController.dismissViewControllerAnimated(true, completion: nil)
    }

    代碼說明:

      不等 loadProductWithParameters 返回直接 presentViewController ,解析失敗再嘗試用 openURL 的方式打開。

 

  參考:

    http://stackoverflow.com/questions/17871920/odd-behavior-with-skstoreproductviewcontroller

 

結束

  很早之前寫過這個功能,由於用戶體驗不好代碼直接被 revert 掉了,今天又搜了一下找到了辦法。


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