这是我参与8月更文挑战的第18天，活动详情查看： 8月更文挑战” juejin.cn/post/698796… ”

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.

developer.apple.com/library/arc…

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'

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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;
    }

}

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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。

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.

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

在这里插入图片描述

I 、Adding support for universal links

Create an apple-app-site-association file that contains JSON data about the URLs that your app can handle.
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.
Prepare your app to handle universal links.

1.1 Creating and Uploading the Association File

developer.apple.com/library/arc…

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

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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：search.developer.apple.com/appsearch-v…

oia.zhihu.com/apple-app-a…
oia.zhihu.com/apple-app-s…

{
  "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"
    ]
  }
}
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注意事项：

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。

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。

1.2 Preparing Your App to Handle Universal Links

工程配置Associated Domains

在这里插入图片描述

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;
}

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- (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];
        }
}
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