前言
应用内跳转到 AppStore 的文章很多,一般都是用 SKStoreProductViewController 来实现的,不知道有没有在意一个问题:打开很慢!!怎么忍?!
声明
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正文
一般网上的文章的代码:
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) }
实现的效果很好,就是很慢,点击按钮调用 openAppStore 要很久才能显示出界面,就算加一个转圈效果也很差。原因是因为要去 linkmaker.itunes.apple.com 根据 identifier 查找链接,仔细看代码我们会发现 presentViewController 是在查找到结果才被调用,其实我们可以不用让界面现出来,虽然时间是一样的,但是用户体验会很好,修改后代码如下:
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) }
代码说明:
不等 loadProductWithParameters 返回直接 presentViewController ,解析失败再尝试用 openURL 的方式打开。
参考:
http://*.com/questions/17871920/odd-behavior-with-skstoreproductviewcontroller
结束
很早之前写过这个功能,由于用户体验不好代码直接被 revert 掉了,今天又搜了一下找到了办法。
转载:http://www.cnblogs.com/over140/p/4923740.html