前言

When you support universal links, iOS users can tap a link to your website and get seamlessly redirected to your installed app without going through Safari. If your app isn’t installed, tapping a link to your website opens your website in Safari.

https://developer.apple.com/library/archive/documentation/General/Conceptual/AppSearch/UniversalLinks.html

在wap中唤起app最广泛使用的方式并不是Universal Link，而是直接Schema跳转

location.href = 'schema://公众号：iOS逆向'

在 iOS9 之前，要在浏览器中唤醒 App，我们通常使用 scheme。这种方式需要提前判断系统中是否安装了能够响应此scheme的App，并且这种方式在微信被禁用。

- (BOOL)application:(UIApplication *)application openURL:(NSURL *)url sourceApplication:(nullable NSString *)sourceApplication annotation:(id)annotation API_DEPRECATED_WITH_REPLACEMENT("application:openURL:options:", ios(4.2, 9.0)) API_UNAVAILABLE(tvos){
    if ([[url absoluteString] hasPrefix:@"schema://"]) {
        [[xxx sharedInstance] operationFromRouteURL:[url absoluteString]];//路由
        return YES;
    }
}

Universal Links 可以链接到您应用中的内容并安全地共享数据。

Universal Links 是标准 HTTP 或 HTTPS 链接，因此既适用于网站，也适用于应用程序。

1. 如果未安装您的应用程序，则系统会在 Safari 中打开URL，以使您的网站能够处理它。浏览器可以正常跳转，因此在没装App的时候，不会像schema出现网页无效的框.
2. 当用户安装您的应用程序时，iOS 会检查存储在Web服务器上的文件，以验证您的网站是否允许您的应用程序代表其处理URL

I 、Adding support for universal links

1. Create an apple-app-site-association file that contains JSON data about the URLs that your app can handle.
   
2. Upload the apple-app-site-association file to your HTTPS web server. You can place the file at the root of your server or in the .well-known subdirectory.
   
3. Prepare your app to handle universal links.
   

1.1 Creating and Uploading the Association File

https://developer.apple.com/library/archive/documentation/General/Conceptual/AppSearch/UniversalLinks.html

{
    "applinks": {
        "apps": [],
        "details": [
            {
                "appID": "9JA89QQLNQ.com.apple.wwdc",
                "paths": [ "/wwdc/news/", "/videos/wwdc/2015/*"]
            },
            {
                "appID": "ABCD1234.com.apple.wwdc",
                "paths": [ "*" ]
            }
        ]
    }
}

文件为json保存为文本即可

你的域名必须支持Https

域名根目录下放这个文件apple-app-association，不带任何后缀

官方测试地址：https://search.developer.apple.com/appsearch-validation-tool/

https://oia.zhihu.com/apple-app-associationhttps://oia.zhihu.com/apple-app-site-association

{
  "applinks": {
    "apps": [
    ],
    "details": {
      "8J52SRPW6X.com.zhihu.ios": {
        "paths": [
          "*"
        ]
      },
      "886PYH8YW5.com.zhihu.ios": {
        "paths": [
          "*"
        ]
      },
      "B6MTNRMU2Y.com.zhihu.ios": {
        "paths": [
          "*"
        ]
      },
      "B6MTNRMU2Y.com.zhihu.ios-dev": {
        "paths": [
          "*"
        ]
      }
    }
  },
  "webcredentials": {
    "apps": [
      "8J52SRPW6X.com.zhihu.ios",
      "886PYH8YW5.com.zhihu.ios",
      "B6MTNRMU2Y.com.zhihu.ios",
      "B6MTNRMU2Y.com.zhihu.ios-dev"
    ]
  },
  "activitycontinuation": {
    "apps": [
      "8J52SRPW6X.com.zhihu.ios",
      "886PYH8YW5.com.zhihu.ios",
      "B6MTNRMU2Y.com.zhihu.ios",
      "B6MTNRMU2Y.com.zhihu.ios-dev"
    ]
  }
}

1.2 Preparing Your App to Handle Universal Links

1. 工程配置Associated Domains

2. 编写App被唤醒后的处理逻辑

- (BOOL)application:(UIApplication *)application continueUserActivity:(NSUserActivity *)userActivity restorationHandler:(void (^)(NSArray * _Nullable))restorationHandler {
    if ([userActivity.activityType isEqualToString:NSUserActivityTypeBrowsingWeb]) {
        NSURL *webUrl = userActivity.webpageURL;
        [self handleUniversalLink:webUrl]; // 转化为App路由
    }
    return YES;
}

- (void)handleUniversalLink:(NSURL*)webUrl{
        NSString *host = webpageURL.host;
        if ([host isEqualToString:@"apple..com"]) {
            //进行我们需要的处理
        }
        else {
            [[UIApplication sharedApplication]openURL:webpageURL];
        }
}

II、注意事项

2.1 跨域

1. iOS 9.2 之前，不用跨域都可以跳转， iOS 9.2 之后，必须跨域才能进行跳转到原生 App 上。
2. iOS只会在 App 第一次启动时请求一次 apple-app-site-association 文件，服务器上该文件的更新不会让 iOS 本地的文件同步更新。

例子：为了解决苹果强制要求跨域才生效的问题，Universal Link就不能配置在主域名下，于是知乎才会准备一个oia.zhihu.com域名，专为Universal Link使用，

2.2 多业务线共用同一个 apple-app-association

多业务线共可以简单的把json file 进行merge， 共用同一个 apple-app-association

2.3 iOS拉取apple-app-association的时机

1. 每次App安装后的第一次Launch，会拉取apple-app-association
2. 除此之外在Appstore每次App的版本更新后的第一次Launch，也会拉取apple-app-association。

也就是说，让新的apple-app-association生效的方式是可以将App再发一个版本

III、iOS防止在WKWebView中打开Universal Link

Prevent universal links from opening in WKWebView

iOS防止在WKWebView中打开Universal Link

———————————————— 版权声明：本文为CSDN博主「#公众号：iOS逆向」的原创文章，遵循CC 4.0 BY-SA版权>协议，转载请附上原文出处链接及本声明。原文链接：https://blog.csdn.net/z929118967/article/details/119813220

see also