从 iOS 应用打开 Facebook 页面的链接

Open link to Facebook page from iOS app

提问by medvedNick

I want to redirect user to my App's Facebook page, so I have the following code:

我想将用户重定向到我的应用程序的 Facebook 页面，所以我有以下代码：

[[UIApplication sharedApplication] openURL:
    [NSURL URLWithString: @"https://facebook.com/myAppsPage"]];

this works great, if there is no Facebook app on device. Then the link opens in Safari.

如果设备上没有 Facebook 应用程序，这很好用。然后链接在 Safari 中打开。

If there is Facebook app installed on device, then after executing above code Facebook app opens, but it is showing users timeline, not my app's page. I tried to change link to @"fb://pages/myAppsPage"and to @"fb://profile/myAppsPage, but this again opened users timeline.

如果设备上安装了 Facebook 应用程序，则在执行上述代码后 Facebook 应用程序打开，但它显示的是用户时间线，而不是我的应用程序页面。我试图将链接更改为@"fb://pages/myAppsPage"和@"fb://profile/myAppsPage，但这再次打开了用户时间线。

So, my question is: how can I open my apps page in safari, if there is no Facebook app, or in Facebook app, if the one is installed.

所以，我的问题是：如果没有 Facebook 应用程序或 Facebook 应用程序（如果安装了），我如何在 safari 中打开我的应用程序页面。

回答by Sean Kladek

You have to use the facebook ID for the given page rather than the vanity URL. To get the pages ID, enter your page's vanity name at the following URL and copy the value for "id":

您必须使用给定页面的 facebook ID 而不是虚 URL。要获取页面 ID，请在以下 URL 中输入页面的虚名并复制“id”的值：

https://graph.facebook.com/yourappspage

https://graph.facebook.com/yourappspage

Once you have the id, you can set up the method to check if FB is installed using the canOpenURL method and serve the appropriate content for both states:

获得 id 后，您可以设置方法以检查是否使用 canOpenURL 方法安装了 FB 并为两种状态提供适当的内容：

NSURL *facebookURL = [NSURL URLWithString:@"fb://profile/113810631976867"];
if ([[UIApplication sharedApplication] canOpenURL:facebookURL]) {
    [[UIApplication sharedApplication] openURL:facebookURL];
} else {
    [[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"http://facebook.com"]];
}

回答by ambientlight

It seems that since the last answer Facebook have changed the scheme for pages (profile is same as before)

似乎自上次回答以来 Facebook 已经更改了页面方案（配置文件与以前相同）

the page_idis now the part of URL query. So in order to redirect to fb app, the url has to be in the format:

在page_id现在是URL查询的一部分。因此，为了重定向到 fb 应用程序，网址必须采用以下格式：

fb://page/?id=your_page_numeric_id

Also make sure to whitelist fbscheme in your apps Info.plist

还要确保fb在您的应用程序中将方案列入白名单Info.plist

<key>LSApplicationQueriesSchemes</key>
<array>
    <string>fb</string>
</array>

In case there will be any further modifications or you don't know your facebook page's page_id, you can extract the precise iOS fbURL from your Facebook web page source.

如果将有任何进一步的修改或您不知道您的 Facebook 页面的page_id，您可以fb从您的 Facebook 网页源中提取准确的 iOS URL。

1. Open your Facebook page in Safari
2. Right click -> Inspect Element
3. Search for al:ios:url

1. 在 Safari 中打开您的 Facebook 页面
2. 右键单击 -> 检查元素
3. 搜索 al:ios:url

You should be able to find:

您应该能够找到：

<meta property="al:ios:url" content="fb://page/?id='your_page_numeric_id'">

Copying this URL into your app and then calling:

将此 URL 复制到您的应用程序中，然后调用：

guard let facebookURL = NSURL(string: "fb://page/?id=your_page_numeric_id") else {
    return
}

if (UIApplication.sharedApplication().canOpenURL(facebookURL)) {
    UIApplication.sharedApplication().openURL(facebookURL)
} else {

    guard let webpageURL = NSURL(string: "http://facebook.com/yourPage/") else {
        return
    }

    UIApplication.sharedApplication().openURL(webpageURL)
}

should do the job...

应该做这个工作...

回答by Nycen

I was happy to find skladek's answer, so here's my contribution: Swift + other social networks.

我很高兴找到 skladek 的答案，所以这是我的贡献：Swift + 其他社交网络。

I found that I needed 3 forward slashes for twitter, and only 2 for Facebook and Google+, I didn't investigate more than that…

我发现 Twitter 需要 3 个正斜杠，而 Facebook 和 Google+ 只需要 2 个，我没有调查更多……

// Go to https://graph.facebook.com/PageName to get your page id
func openFacebookPage() {
    let facebookURL = NSURL(string: "fb://profile/PageId")!
    if UIApplication.sharedApplication().canOpenURL(facebookURL) {
        UIApplication.sharedApplication().openURL(facebookURL)
    } else {
        UIApplication.sharedApplication().openURL(NSURL(string: "https://www.facebook.com/PageName")!)
    }
}

func openTwitterProfile() {
    let twitterURL = NSURL(string: "twitter:///user?screen_name=USERNAME")!
    if UIApplication.sharedApplication().canOpenURL(twitterURL) {
        UIApplication.sharedApplication().openURL(twitterURL)
    } else {
        UIApplication.sharedApplication().openURL(NSURL(string: "https://twitter.com/USERNAME")!)
    }
}

func openGooglePlusPage() {
    let googlePlusURL = NSURL(string: "gplus://plus.google.com/u/0/PageId")!
    if UIApplication.sharedApplication().canOpenURL(googlePlusURL) {
        UIApplication.sharedApplication().openURL(googlePlusURL)
    } else {
        UIApplication.sharedApplication().openURL(NSURL(string: "https://plus.google.com/PageId")!)
    }
}

An attempt at refactoring:

重构的尝试：

struct SocialNetworkUrl {
    let scheme: String
    let page: String

    func openPage() {
        let schemeUrl = NSURL(string: scheme)!
        if UIApplication.sharedApplication().canOpenURL(schemeUrl) {
            UIApplication.sharedApplication().openURL(schemeUrl)
        } else {
            UIApplication.sharedApplication().openURL(NSURL(string: page)!)
        } 
    }
}

enum SocialNetwork {
    case Facebook, GooglePlus, Twitter, Instagram
    func url() -> SocialNetworkUrl {
        switch self {
        case .Facebook: return SocialNetworkUrl(scheme: "fb://profile/PageId", page: "https://www.facebook.com/PageName")
        case .Twitter: return SocialNetworkUrl(scheme: "twitter:///user?screen_name=USERNAME", page: "https://twitter.com/USERNAME")
        case .GooglePlus: return SocialNetworkUrl(scheme: "gplus://plus.google.com/u/0/PageId", page: "https://plus.google.com/PageId")
        case .Instagram: return SocialNetworkUrl(scheme: "instagram://user?username=USERNAME", page:"https://www.instagram.com/USERNAME")
        }
    }
    func openPage() {
        self.url().openPage()
    }
}

Now you can call:

现在你可以调用：

SocialNetwork.Twitter.openPage()

回答by Emre

For iOS 9, You must whitelist the url's that your app will call out to using the LSApplicationQueriesSchemes key in your Info.plist.

对于 iOS 9，您必须将应用程序将使用 Info.plist 中的 LSApplicationQueriesSchemes 键调用的 URL 列入白名单。

Check here.

检查这里。

<key>LSApplicationQueriesSchemes</key>
    <array>
     <string>fb</string>
     <string>fbapi</string>
     <string>fbauth2</string>
     <string>fbshareextension</string>
     <string>fb-messenger-api</string>
     <string>twitter</string>
     <string>whatsapp</string>
     <string>wechat</string>
     <string>line</string>
     <string>instagram</string>
     <string>kakaotalk</string>
     <string>mqq</string>
     <string>vk</string>
     <string>comgooglemaps</string>
    </array>

回答by Javier Amor Penas

After much testing I have found one of the most effective solutions:

经过多次测试，我找到了最有效的解决方案之一：

NSString *facebookID = @"XXXXXXXXXX";
NSString *facebookURL = @"www.facebook.com/XXXXXXXX";
NSURL *urlModal = [NSURL URLWithString:[NSString stringWithFormat:@"fb://facewebmodal/f?href=%@", facebookURL]];
NSURL *urlWithID = [NSURL URLWithString:[NSString stringWithFormat:@"fb://page/%@", facebookID]]; // or "fb://profile/%@" or another type of ID
NSURL *url = [NSURL URLWithString:facebook_url];


if(facebookID && !facebookID.isEmpty && [[UIApplication sharedApplication] canOpenURL:urlWithID]) {
    // open facebook app with facebookID
    [[UIApplication sharedApplication] openURL:urlWithID];
} else if (facebookURL && !facebookURL.isEmpty && [[UIApplication sharedApplication] canOpenURL:urlModal]) {
    // open facebook app with facebookUrl
    [[UIApplication sharedApplication] openURL:urlModal];
} else if (![[UIApplication sharedApplication] openURL:url]) {
    // somehow open
    NSLog(@"%@%@",@"Failed to open url:",[url description]);
}

Order of sentences "if else" vary to your liking ...

“if else”的句子顺序因您的喜好而异......

Enjoy it!! :-)

好好享受！！:-)

回答by Cristian Mora

Swift 2.3

斯威夫特 2.3

For code you can use this example:

对于代码，您可以使用此示例：

Note: If you can't find the facebook profile id can you use the follow site to do it (https://findmyfbid.com/)

注意：如果您找不到 facebook 个人资料 ID，您可以使用以下网站来完成 ( https://findmyfbid.com/)

func goFacebook() {
    let profileID = "" //Here put profile id Example:'62260589592'
    let facebookURL = NSURL(string: "fb://profile/\(profileID)")!

    if UIApplication.sharedApplication().canOpenURL(facebookURL) {
        UIApplication.sharedApplication().openURL(facebookURL)
    } else {
        UIApplication.sharedApplication().openURL(NSURL(string: "https://www.facebook.com/PageName")!)
    }
}

For Info.plist you need set the follow parameters:

对于 Info.plist，您需要设置以下参数：

Note: For open the Info.plist on Source Mode

注意：用于在源模式下打开 Info.plist

-Go to Info.plist file and click right

- 转到 Info.plist 文件并单击右键

-Select "Open As"

- 选择“打开为”

-Select "Source Code"

- 选择“源代码”

-Put code above of another

- 把代码放在另一个上面

<key>LSApplicationQueriesSchemes</key>
<array>
 <string>fb</string>
 <string>fbapi</string>
 <string>fbauth2</string>
 <string>fbshareextension</string>
 <string>fb-messenger-api</string>
</array>