Xamarin：发布最新的FB API [英] Xamarin: Issue with latest FB API

问题描述

最新的FB登录API有三个参数

  public unsafe virtual void LogInWithReadPermissions（string [] permissions，UIViewController fromViewController，[BlockProxy （typeof（Trampolines.NIDLoginManagerRequestTokenHandler））] LoginManagerRequestTokenHandler处理程序
  

我正在使用MVVMCross。对于fb登录，我尝试创建了一个我所在的视图的实例，并作为LogInWithReadPermissions（）的参数传递。

VIEWMODEL：

  private async void DoFacebookSignIn（）
 {
 try 
 {
 await facebookService。登录（）; 
 DoAutoLogin（）; 
} 
} 
  

SERVICE： p>

  private readonly string [] permitions = new string [] {email，public_profile}; 
 public async System.Threading.Tasks.Task LogIn（）
 {
 LoginManager.LogInWithReadPermissionsAsync（permitions）; 
 
 LoginManagerLoginResult result = await LogInWithReadPermissionsAsync（）; 
 
 if（result.IsCancelled）
 {
 ServiceFactory.UserMessageService.ShowToast（Facebook登录被取消）; 
} 
} 
 
私人任务< LoginManagerLoginResult> LogInWithReadPermissionsAsync（）
 {
 var tcs = new TaskCompletionSource< LoginManagerLoginResult> （）; 
 LoginManager.LogInWithReadPermissions（permitions，null，（LoginManagerLoginResult result，NSError error）=> 
 {
 if（error.IsNotNull（））
 {
 tcs。 SetException（new IosErrorException（error））; 
} else 
 {
 tcs.SetResult（result）; 
} 
}）; 
 
 return tcs.Task; 
} 
  

但是它的失败，我需要从Viewmodel传递查​​看信息，当我我打电话给这个func？如何从视图模型传递视图实例？有人可以帮忙吗？

更新

服务失败： p>

func LogInWithReadPermissionsAsync（）
line3：（LoginManager.LogInWithReadPermissions ...）

，不会出现任何错误。它刚刚崩溃
Facebook API版本：Xamarin.Facebook.iOSversion =4.13.1

更新
删除未使用的代码。

解决方案

我有解决方案。

代码很好，只需要通过添加

 < key> NSAppTransportSecurity< / key>将Facebook网络请求的白名单 
< dict> 
< key> NSExceptionDomains< / key> 
< dict> 
< key> facebook.com< / key> 
< dict> 
< key> NSIncludesSubdomains< / key> 
< true /> 
< key> NSThirdPartyExceptionRequiresForwardSecrecy< / key> 
< false /> 
< / dict> 
< key> fbcdn.net< / key> 
< dict> 
< key> NSIncludesSubdomains< / key> 
< true /> 
< key> NSThirdPartyExceptionRequiresForwardSecrecy< / key> 
< false /> 
< / dict> 
< key> akamaihd.net< / key> 
< dict> 
< key> NSIncludesSubdomains< / key> 
< true /> 
< key> NSThirdPartyExceptionRequiresForwardSecrecy< / key> 
< false /> 
< / dict> 
< / dict> 
< / dict> 
 
如果您正在使用iOS SDK 9.0重新编译，如果您使用SDK v4.5或更旧的版本，请将以下内容添加到应用程序的plist中：
 
< ;键> LSApplicationQueriesSchemes< /密钥GT; 
< array> 
< string> fbapi< / string> 
< string> fbapi20130214< / string> 
< string> fbapi20130410< / string> 
< string> fbapi20130702< / string> 
< string> fbapi20131010< / string> 
< string> fbapi20131219< / string> 
< string> fbapi20140410< / string> 
< string> fbapi20140116< / string> 
< string> fbapi20150313< / string> 
< string> fbapi20150629< / string> 
< string> fbauth< / string> 
< string> fbauth2< / string> 
< string> fb-messenger-api20140430< / string> 
< / array> 
如果您使用的版本比v4.6版本更早使用Facebook.MessengerShareKit，还可以添加：
 
< string> fb-messenger-platform-20150128< / string> 
< string> fb-messenger-platform-20150218< / string> 
< string> fb-messenger-platform-20150305< / string> 
如果您使用SDK的v4.6.0，则只需要添加：
 
< key> LSApplicationQueriesSchemes< / key> 
< array> 
< string> fbapi< / string> 
< string> fb-messenger-api< / string> 
< string> fbauth2< / string> 
< string> fbshareextension< / string> 
< / array> 
  

如Xamarin Facebook iOS SDK here 。

Latest FB login API has three parameters

public unsafe virtual void LogInWithReadPermissions (string[] permissions, UIViewController fromViewController, [BlockProxy (typeof(Trampolines.NIDLoginManagerRequestTokenHandler))] LoginManagerRequestTokenHandler handler)

I am using MVVMCross. For fb login, I tried created an instance of the view i am in, and pass it as a parameter for LogInWithReadPermissions()

VIEWMODEL:

private async void DoFacebookSignIn()
        {
            try 
            {               
                await facebookService. Login();
                DoAutoLogin();
            }
}

SERVICE:

private readonly string[] permitions = new string[] { "email", "public_profile" };    
public async System.Threading.Tasks.Task LogIn()
            {
    LoginManager.LogInWithReadPermissionsAsync (permitions);

                LoginManagerLoginResult result = await LogInWithReadPermissionsAsync();

                if (result.IsCancelled)
                {
                    ServiceFactory.UserMessageService.ShowToast("Facebook login is canceled");
                }
            }

        private Task<LoginManagerLoginResult> LogInWithReadPermissionsAsync()
            {
                var tcs = new TaskCompletionSource<LoginManagerLoginResult> ();
                LoginManager.LogInWithReadPermissions (permitions,null, (LoginManagerLoginResult result, NSError error) =>
                {
                    if(error.IsNotNull ())
                    {
                        tcs.SetException (new IosErrorException(error));
                    } else 
                    {
                        tcs.SetResult (result);
                    }
                });

                return tcs.Task;
            }

But its failing, Do i need to pass view info from Viewmodel, when I am calling this func? How to pass view instance from view model ? Can anyone help?

UPDATE

It's failing at the service:

func LogInWithReadPermissionsAsync() line3: (LoginManager.LogInWithReadPermissions...)

without giving any error. Its just crashing. The Facebook API version: "Xamarin.Facebook.iOS" version="4.13.1"

UPDATE Removed unused code.

解决方案

I got the solution.

The code was fine I just needed to 'Whitelist Facebook Servers for Network Requests' by adding

<key>NSAppTransportSecurity</key>
<dict>
    <key>NSExceptionDomains</key>
    <dict>
        <key>facebook.com</key>
        <dict>
            <key>NSIncludesSubdomains</key>
            <true/>                
            <key>NSThirdPartyExceptionRequiresForwardSecrecy</key>
            <false/>
        </dict>
        <key>fbcdn.net</key>
        <dict>
            <key>NSIncludesSubdomains</key>
            <true/>
            <key>NSThirdPartyExceptionRequiresForwardSecrecy</key>
            <false/>
        </dict>
        <key>akamaihd.net</key>
        <dict>
            <key>NSIncludesSubdomains</key>
            <true/>
            <key>NSThirdPartyExceptionRequiresForwardSecrecy</key>
            <false/>
        </dict>
    </dict>
</dict>

If you're recompiling with iOS SDK 9.0, add the following to your application's plist if you're using a version of the SDK v4.5 or older:

<key>LSApplicationQueriesSchemes</key>
<array>
    <string>fbapi</string>
    <string>fbapi20130214</string>
    <string>fbapi20130410</string>
    <string>fbapi20130702</string>
    <string>fbapi20131010</string>
    <string>fbapi20131219</string>    
    <string>fbapi20140410</string>
    <string>fbapi20140116</string>
    <string>fbapi20150313</string>
    <string>fbapi20150629</string>
    <string>fbauth</string>
    <string>fbauth2</string>
    <string>fb-messenger-api20140430</string>
</array>
If you're using Facebook.MessengerShareKit from versions older than the v4.6 release, also add:

<string>fb-messenger-platform-20150128</string>
<string>fb-messenger-platform-20150218</string>
<string>fb-messenger-platform-20150305</string>
If you're using v4.6.0 of the SDK, you only need to add:

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

As mentioned in Xamarin Facebook iOS SDK here.

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