从iOS 9开发人员种子2开始，您不再需要为通用链接签名apple-app-site-association文件.网络上的大多数地方仍然像官方Apple Docs一样提到需要对文件签名.这是WWDC会话，宣布您不再需要对该文件签名. https://developer.apple.com/videos/play/wwdc2015-509/转到〜14分钟观看视频，他们宣布了这一点和限制(与iOS 8向后兼容).

As of iOS 9 developer seed 2, you no longer need to sign the apple-app-site-association file for Universal links. Most places on the web still reference the need to sign the file as do the official Apple Docs. Here's the WWDC session where it was announced that you no longer need to sign the file. https://developer.apple.com/videos/play/wwdc2015-509/ goto ~14 mins in to the video where they announce this and the limitations (not backwards compatible with iOS 8).

我已验证通用链接在iOS 9官方发行版中可以处理未签名的文件.

I have verified that Universal Links work with unsigned files on the official iOS 9 release.