我按照微信官方文档（https://developers.weixin.qq.com/doc/oplatform/Mobile_App/Access_Guide/iOS.html） 接入IOS登录 问题：报错出现很多libWeChatSDK.a 文件中的 Undefined symbols 该如何解决？ 错误信息： "_OBJC_CLASS_$_UIPasteboard", referenced from:       objc-class-ref in libWeChatSDK.a(AppCommunicate.o)   "_OBJC_CLASS_$_UIDevice", referenced from:       objc-class-ref in libWeChatSDK.a(WeChatApiUtil.o)   "_OBJC_CLASS_$_UIScreen", referenced from:       objc-class-ref in AppDelegate.o       objc-class-ref in libWeChatSDK.a(WapAuthHandler.o)       objc-class-ref in libWeChatSDK.a(WeChatApiUtil.o)   "_OBJC_CLASS_$_UIApplication", referenced from:       objc-class-ref in libWeChatSDK.a(WapAuthHandler.o)       objc-class-ref in libWeChatSDK.a(WeChatApiUtil.o)       objc-class-ref in libWeChatSDK.a(WXApi.o)   "_UIImageJPEGRepresentation", referenced from:       -[WXMediaMessage setThumbImage:] in libWeChatSDK.a(WXApiObject.o)   "_OBJC_CLASS_$_UINavigationController", referenced from:       objc-class-ref in libWeChatSDK.a(WapAuthHandler.o)   "_OBJC_CLASS_$_UIWindow", referenced from:       objc-class-ref in AppDelegate.o   "_OBJC_CLASS_$_UIBarButtonItem", referenced from:       objc-class-ref in libWeChatSDK.a(WapAuthHandler.o)   "_OBJC_METACLASS_$_UIViewController", referenced from:       _OBJC_METACLASS_$_WXWebViewController in libWeChatSDK.a(WapAuthHandler.o)   "_OBJC_CLASS_$_UIImage", referenced from:       objc-class-ref in libWeChatSDK.a(WechatAuthSDK.o)       objc-class-ref in libWeChatSDK.a(AppCommunicateData.o)   "_UIApplicationOpenURLOptionUniversalLinksOnly", referenced from:       +[WXApi launchApplicationWithUrl:completion:] in libWeChatSDK.a(WXApi.o)   "_OBJC_CLASS_$_UIAlertAction", referenced from:       objc-class-ref in libWeChatSDK.a(WapAuthHandler.o)   "_OBJC_CLASS_$_UIAlertController", referenced from:       objc-class-ref in libWeChatSDK.a(WapAuthHandler.o)   "_OBJC_CLASS_$_UIResponder", referenced from:       _OBJC_CLASS_$_AppDelegate in AppDelegate.o   "_OBJC_CLASS_$_UIViewController", referenced from:       _OBJC_CLASS_$_WXWebViewController in libWeChatSDK.a(WapAuthHandler.o)   "_OBJC_METACLASS_$_UIResponder", referenced from:       _OBJC_METACLASS_$_AppDelegate in AppDelegate.o ld: symbol(s) not found for architecture arm64 ViewController", referenced from:\       _OBJC_METACLASS_$_WXWebViewController in libWeChatSDK.a(WapAuthHandler.o)\   "_OBJC_CLASS_$_UIImage", referenced from:\       objc-class-ref in libWeChatSDK.a(WechatAuthSDK.o)\       objc-class-ref in libWeChatSDK.a(AppCommunicateData.o)\   "_UIApplicationOpenURLOptionUniversalLinksOnly", referenced from:\       +[WXApi launchApplicationWithUrl:completion:] in libWeChatSDK.a(WXApi.o)\   "_OBJC_CLASS_$_UIAlertAction", referenced from:\       objc-class-ref in libWeChatSDK.a(WapAuthHandler.o)\   "_OBJC_CLASS_$_UIAlertController", referenced from:\       objc-class-ref in libWeChatSDK.a(WapAuthHandler.o)\   "_OBJC_CLASS_$_UIResponder", referenced from:\       _OBJC_CLASS_$_AppDelegate in AppDelegate.o\   "_OBJC_CLASS_$_UIViewController", referenced from:\       _OBJC_CLASS_$_WXWebViewController in libWeChatSDK.a(WapAuthHandler.o)\   "_OBJC_METACLASS_$_UIResponder", referenced from:\       _OBJC_METACLASS_$_AppDelegate in AppDelegate.o\ ld: symbol(s) not found for architecture arm64\ } 如下图： [图片] 接入版本：1.8.7.1 xcode版本：11.5 Build Setting 部分设置： [图片] Build Phases部分设置： [图片] 其他项均按文档设置

我点击了转发按钮，调用onShareAppMessage(),应该说会马上弹出分享窗口的。但是，我想延迟1～2s后弹出分享窗口。总之，我的需求是：点击转发按钮，延迟1～2s后弹出分享窗口。这该如何实现呢？