options[UIApplicationOpenURLOptionsKey.sourceApplication] as! String

[AlasKuNull]

application(_ app: UIApplication, open url: URL, options: [UIApplicationOpenURLOptionsKey : Any] = [:])

方法中的:

urlKey:String = options[UIApplicationOpenURLOptionsKey.sourceApplication] as! String

在iOS13中会闪退
原因是空对象强制解包.
解决方法:

    func application(_ app: UIApplication, open url: URL, options: [UIApplicationOpenURLOptionsKey : Any] = [:]) -> Bool {
        if let urlKey:String = options[UIApplicationOpenURLOptionsKey.sourceApplication] as? String {
        
        if urlKey == "com.tencent.xin"
        {
            // 微信 的回调
            return LDWechatShare.handle(url)
        } else if urlKey == "com.tencent.mqq"
        {
            
            // QQ 的回调
            return LDTencentShare.handle(url)
        } else if urlKey == "com.sina.weibo"
        {
            // 新浪微博 的回调
            return LDSinaShare.handle(url)
        }
        }
        if url.absoluteString.hasPrefix("tencentxxxxxxxxx") { // qq
            return LDTencentShare.handle(url)

        }else if url.absoluteString.hasPrefix("wbxxxxxxx") { // weibo
            return LDSinaShare.handle(url)

        }else if url.absoluteString.hasPrefix("wxxxxxxxxxx") { // wexin
            return LDWechatShare.handle(url)

        }
        return true
    }