blocks|key|4472095|text|你遵循这些步骤了吗？|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4472096|-+(BOOL)application:(UIApplication+*)application+didFinishLaunchingWithOptions:(NSDictionary+*)launchOptions+{
+return+[[FBSDKApplicationDelegate+sharedInstance]+application:application
didFinishLaunchingWithOptions:launchOptions];
}

-+(BOOL)application:(UIApplication+*)application+openURL:(NSURL+*)url+sourceApplication:(NSString+*)sourceApplication+annotation:(id)annotation+{
++return+[[FBSDKApplicationDelegate+sharedInstance]+application:application
openURL:url
sourceApplication:sourceApplication
annotation:annotation
+];
}|code-block|syntax|javascript|4472097|我认为你错过了在应用程序委托中调用应用程序委托的要点。第二个方法很重要，因为它向您的应用程序提供关于用户在safari中完成登录的回调。|4472098|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

Did you follow these steps? 

<pre><code>- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
 return [[FBSDKApplicationDelegate sharedInstance] application:application
didFinishLaunchingWithOptions:launchOptions];
}

- (BOOL)application:(UIApplication *)application openURL:(NSURL *)url sourceApplication:(NSString *)sourceApplication annotation:(id)annotation {
 return [[FBSDKApplicationDelegate sharedInstance] application:application
openURL:url
sourceApplication:sourceApplication
annotation:annotation
 ];
}
</code></pre>

I think you are missing the point where you got to call the applications delegate in App delegate.
The second method is vital coz it gives the callback to your application about the login did finish in safari by the user

blocks|key|4472596|text|事实证明，在iOS+9上，当实现UIApplicationDelegate的application:openURL:options:时，将不会调用application:openURL:sourceApplication:annotation:。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4472597|所以我要做的就是从FBSDKApplicationDelegate的application:openURL:sourceApplication:annotation:调用UIApplicationDelegate的application:openURL:options:|4472598|-+(BOOL)application:(UIApplication+*)app+openURL:(NSURL+*)url+options:(NSDictionary<NSString*,+id>+*)options+{
++++return+[[FBSDKApplicationDelegate+sharedInstance]+application:app
++++++++++++++++++++++++++++++++++++++++++++++++++++++openURL:url
++++++++++++++++++++++++++++++++++++++++++++sourceApplication:options[UIApplicationOpenURLOptionsSourceApplicationKey]
+++++++++++++++++++++++++++++++++++++++++++++++++++annotation:options[UIApplicationOpenURLOptionsAnnotationKey]];
}|code-block|syntax|javascript|4472599|entityMap^0|G|L|12|S|21|1D|0|9|O|Y|1D|2D|L|2Z|S|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]|$9|R|A|S|B|C]|$9|T|A|U|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|V|8|@$9|W|A|X|B|C]|$9|Y|A|Z|B|C]|$9|10|A|11|B|C]|$9|12|A|13|B|C]]|D|@]|E|$]]|$1|H|3|I|5|J|7|14|8|@]|D|@]|E|$K|L]]|$1|M|3|-4|5|6|7|15|8|@]|D|@]|E|$]]]|N|$]]

Turns out that on iOS 9 when <code>UIApplicationDelegate</code>'s <code>application:openURL:options:</code> is implemented, <code>application:openURL:sourceApplication:annotation:</code> will not get called.

So what I had to do is call <code>FBSDKApplicationDelegate</code>'s <code>application:openURL:sourceApplication:annotation:</code> from <code>UIApplicationDelegate</code>'s <code>application:openURL:options:</code>

<pre><code>- (BOOL)application:(UIApplication *)app openURL:(NSURL *)url options:(NSDictionary&lt;NSString*, id&gt; *)options {
 return [[FBSDKApplicationDelegate sharedInstance] application:app
 openURL:url
 sourceApplication:options[UIApplicationOpenURLOptionsSourceApplicationKey]
 annotation:options[UIApplicationOpenURLOptionsAnnotationKey]];
}
</code></pre>

blocks|key|4472609|text|对于任何在这个问题上寻求Swift帮助的人来说，下面的方法对我很有效。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4472610|func+application(app:+UIApplication,+openURL+url:+NSURL,+options:+[String+:+AnyObject])+->+Bool+{
++++++++return+FBSDKApplicationDelegate.sharedInstance().application(app,+openURL:+url,+sourceApplication:+UIApplicationOpenURLOptionsSourceApplicationKey,+annotation:+UIApplicationOpenURLOptionsAnnotationKey)
++++}|code-block|syntax|javascript|4472611|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

For anyone looking for Swift assistance on this very issue the following worked for me. 

<pre><code>func application(app: UIApplication, openURL url: NSURL, options: [String : AnyObject]) -&gt; Bool {
 return FBSDKApplicationDelegate.sharedInstance().application(app, openURL: url, sourceApplication: UIApplicationOpenURLOptionsSourceApplicationKey, annotation: UIApplicationOpenURLOptionsAnnotationKey)
 }
</code></pre>

blocks|key|4472635|text|对于Swift来说，这对我很有效(在AppDelegate.swift中添加它)：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4472636|@available(iOS+9.0,+*)
func+application(application:+UIApplication,openURL+url:+NSURL,+options:+[String:+AnyObject])+->+Bool+{
return+FBSDKApplicationDelegate.sharedInstance().application(application,+
+++++openURL:+url,+
+++++sourceApplication:+options[UIApplicationOpenURLOptionsSourceApplicationKey]+as!+String,
+++++annotation:+options+[UIApplicationOpenURLOptionsAnnotationKey])
}|code-block|syntax|javascript|4472637|和|4472638|@available(iOS,+introduced=8.0,+deprecated=9.0)
func+application(application:+UIApplication,openURL+url:+NSURL,+sourceApplication:+String?,+annotation:+AnyObject)+->+Bool+{++
return+FBSDKApplicationDelegate.sharedInstance().application(application,
+++++openURL:+url,
+++++sourceApplication:+sourceApplication!,
+++++annotation:+annotation)
}|4472639|在每种情况下，请记住将import+FBSDKCoreKit与其他import语句一起添加。|offset|length|style|CODE|4472640|这基本上就是谷歌SignIn所使用的。如果它仍然不能工作，您需要按照FaceBook文档中指定的方式设置委托和info.plist。我希望这能帮到你!|4472641|entityMap^0|0|0|0|0|B|J|X|6|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|W|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|X|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|Y|8|@$M|Z|N|10|O|P]|$M|11|N|12|O|P]]|9|@]|A|$]]|$1|Q|3|R|5|6|7|13|8|@]|9|@]|A|$]]|$1|S|3|-4|5|6|7|14|8|@]|9|@]|A|$]]]|T|$]]

For Swift this was working for me (add it in AppDelegate.swift):

<pre><code>@available(iOS 9.0, *)
func application(application: UIApplication,openURL url: NSURL, options: [String: AnyObject]) -&gt; Bool {
return FBSDKApplicationDelegate.sharedInstance().application(application, 
 openURL: url, 
 sourceApplication: options[UIApplicationOpenURLOptionsSourceApplicationKey] as! String,
 annotation: options [UIApplicationOpenURLOptionsAnnotationKey])
}
</code></pre>

and 

<pre><code>@available(iOS, introduced=8.0, deprecated=9.0)
func application(application: UIApplication,openURL url: NSURL, sourceApplication: String?, annotation: AnyObject) -&gt; Bool { 
return FBSDKApplicationDelegate.sharedInstance().application(application,
 openURL: url,
 sourceApplication: sourceApplication!,
 annotation: annotation)
}
</code></pre>

In each case remember to add <code>import FBSDKCoreKit</code> with the other <code>import</code> statements.

Its basically what Google SignIn uses. If its still not working you need to set the delegates and your info.plist like it is specified in the FaceBook Docs. I hope this helps!

blocks|key|4472277|text|对于那些使用iOS10遇到同样问题的人，我添加了以下内容：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4472278|@available(iOS+9.0,+*)
func+application(_+application:+UIApplication,+openURL+url:+URL,+sourceApplication:+String?,+annotation:+AnyObject)+->+Bool+{
++++return+FBSDKApplicationDelegate.sharedInstance().application(application,+open:+url,+sourceApplication:+sourceApplication,+annotation:+annotation)
}|code-block|syntax|javascript|4472279|这应该是可行的，但目前这只是一种变通方法|4472280|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

For those of you experiencing this same issue with iOS10 I added this:

<pre><code>@available(iOS 9.0, *)
func application(_ application: UIApplication, openURL url: URL, sourceApplication: String?, annotation: AnyObject) -&gt; Bool {
 return FBSDKApplicationDelegate.sharedInstance().application(application, open: url, sourceApplication: sourceApplication, annotation: annotation)
}
</code></pre>

This should work but as for now its just a workaround

blocks|key|4472336|text|对于Swift+3和Facebook+SDK+4.16.0：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4472337|将以下代码添加到AppDelegate.swift|4472338|func+application(_+application:+UIApplication,+open+url:+URL,+sourceApplication:+String?,+annotation:+Any)+->+Bool+{
++++return+FBSDKApplicationDelegate.sharedInstance().application(application,+open:+url,+sourceApplication:+sourceApplication,+annotation:+annotation)
}|code-block|syntax|javascript|4472339|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|L|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|M|8|@]|9|@]|A|$G|H]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

For Swift 3 &amp; Facebook SDK 4.16.0:

Add the following code to AppDelegate.swift

<pre><code>func application(_ application: UIApplication, open url: URL, sourceApplication: String?, annotation: Any) -&gt; Bool {
 return FBSDKApplicationDelegate.sharedInstance().application(application, open: url, sourceApplication: sourceApplication, annotation: annotation)
}
</code></pre>

blocks|key|4472877|text|对于像我这样的新手来说，问题是application()方法的另一个实现：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4472878|工作版本：|4472879|+func+application(_+application:+UIApplication,+open+url:+URL,+sourceApplication:+String?,+annotation:+Any)+->+Bool+{
++++return+FBSDKApplicationDelegate.sharedInstance().application(
++++++++application,
++++++++open:+url,
++++++++sourceApplication:+sourceApplication,
++++++++annotation:+annotation)
}|code-block|syntax|javascript|4472880|非工作版本(从某处复制)|4472881|func+application(application:+UIApplication,+openURL+url:+URL,+sourceApplication:+String?,+annotation:+Any)+->+Bool+{
++++return+FBSDKApplicationDelegate.sharedInstance().application(
++++++++application,
++++++++open:+url,
++++++++sourceApplication:+sourceApplication,
++++++++annotation:+annotation)
}|4472882|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|Q|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|R|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|S|8|@]|9|@]|A|$G|H]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

For total swift newbies like myself, the problem was an alternate implementation of the application() method:

Working version:

<pre><code> func application(_ application: UIApplication, open url: URL, sourceApplication: String?, annotation: Any) -&gt; Bool {
 return FBSDKApplicationDelegate.sharedInstance().application(
 application,
 open: url,
 sourceApplication: sourceApplication,
 annotation: annotation)
}
</code></pre>

Non working version (Copied from somewhere )

<pre><code>func application(application: UIApplication, openURL url: URL, sourceApplication: String?, annotation: Any) -&gt; Bool {
 return FBSDKApplicationDelegate.sharedInstance().application(
 application,
 open: url,
 sourceApplication: sourceApplication,
 annotation: annotation)
}
</code></pre>

blocks|key|4472463|text|我刚刚遇到这个问题，感谢@Hesham的修复。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4472464|以下是Swift3的修复：|4472465|func+application(_+app:+UIApplication,+open+url:+URL,+options:+[UIApplicationOpenURLOptionsKey+:+Any])+->+Bool+{
++++return+FBSDKApplicationDelegate.sharedInstance().application(
++++++++app,
++++++++open:+url,
++++++++sourceApplication:+options[UIApplicationOpenURLOptionsKey.sourceApplication]+as!+String,
++++++++annotation:+options[UIApplicationOpenURLOptionsKey.annotation])
}|code-block|syntax|javascript|4472466|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|L|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|M|8|@]|9|@]|A|$G|H]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

I have just come across this issue, thanks @Hesham for the fix.

Here is the Swift3 fix:

<pre><code>func application(_ app: UIApplication, open url: URL, options: [UIApplicationOpenURLOptionsKey : Any]) -&gt; Bool {
 return FBSDKApplicationDelegate.sharedInstance().application(
 app,
 open: url,
 sourceApplication: options[UIApplicationOpenURLOptionsKey.sourceApplication] as! String,
 annotation: options[UIApplicationOpenURLOptionsKey.annotation])
}
</code></pre>

blocks|key|4472990|text|对于xamarin用户：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4472991|public+override+bool+OpenUrl(UIApplication+application,+NSUrl+url,+string+sourceApplication,+NSObject+annotation)
++++++++{

++++++++++++OnUrlProtocolDetected(url.ToString());
++++++++++++if+(url.AbsoluteString.StartsWith("fb"))
++++++++++++{
++++++++++++++++return+ApplicationDelegate.SharedInstance.OpenUrl(application,+url,+sourceApplication,+annotation);
++++++++++++}

}|code-block|syntax|javascript|4472992|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

for xamarin users :

<pre><code>public override bool OpenUrl(UIApplication application, NSUrl url, string sourceApplication, NSObject annotation)
 {

 OnUrlProtocolDetected(url.ToString());
 if (url.AbsoluteString.StartsWith("fb"))
 {
 return ApplicationDelegate.SharedInstance.OpenUrl(application, url, sourceApplication, annotation);
 }

}
</code></pre>

I've followed <a href="https://developers.facebook.com/docs/ios/ios9" rel="noreferrer">this</a> guide to update my application to use Facebook SDK 4.6 to work properly when built with the iOS 9 SDK.

When I tap the login button now, a Safari view controller gets presented (shouldn't it redirect to the Facebook app?), but after accepting permission the Safari view controller is never dismissed. It loads a new blank page and sits there doing nothing. If I tap the Done button, the returned <code>FBSDKLoginManagerLoginResult</code>'s <code>isCancelled</code> is true.

Is it normal that the SDK is choosing the Safari view controller over the Facebook app? And why am I not getting callbacks after login is complete?

Facebook SDK login never calls back my application on iOS 9

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我已经按照指南更新了我的应用程序，当使用iOS 9SDK构建时，可以使用Facebook SDK4.6正常工作。现在，当我点击登录按钮时，会出现一个Safari视图控制器(不是应该重定向到Facebook应用程序吗？)，但在接受许可后，Safari视图控制器永远不会被关闭。它加载一个新的空白页面，然后坐在那里什么也不做...

问Facebook SDK登录从不回调我在iOS 9上的应用程序
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