条件绑定的初始值设定项必须具有可选类型，而不是"动态链接"

Question

我在构建iOS应用程序时收到此错误。

我在这里加粗的行上显示错误

这是我的代码

@available(iOS 8.0, *)
func application(_ application: UIApplication, continue userActivity: NSUserActivity, restorationHandler: @escaping ([Any]?) -> Void) -> Bool {
**guard let dynamicLinks = DynamicLinks.dynamicLinks() else {**
return false
}
let handled = dynamicLinks.handleUniversalLink(userActivity.webpageURL!) { (dynamiclink, error) in
self.openURL(url: userActivity.webpageURL!)
}
if !handled {
if let url = userActivity.webpageURL?.absoluteString {
self.openURL(url: URL(string: url)!)
}
}
return handled
}

Answer 1

显然DynamicLinks.dynamicLinks()不会产生可选结果。将您的代码更改为以下内容：

func application(_ application: UIApplication, continue userActivity: NSUserActivity, restorationHandler: @escaping ([Any]?) -> Void) -> Bool {
let dl = DynamicLinks.dynamicLinks()
let handled = dl.handleUniversalLink(userActivity.webpageURL!) { (dynamiclink, error) in
self.openURL(url: userActivity.webpageURL!)
}
if !handled {
if let url = userActivity.webpageURL?.absoluteString {
self.openURL(url: URL(string: url)!)
}
}
return handled
}