iPad：无法在UIWebview中加载Facebook页面墙 [英] iPad: Cannot load facebook page wall in UIWebview

问题描述

我已经太久了，我在努力解决这个问题。搜索很多，我决定在这里发布一个问题。

我的应用程序的作用

1. 拍摄照片


2. 将照片上传到网页墙壁上


3. 在facebook上显示Facebook页面墙 UIWebview 上传完成

一切都按预期工作4几天后:)突然出现问题：（

代码

  NSString * facebookPageURL = @https://m.facebook.com/pages/<myPageName>/<myPageID>?v=wall
 UIWebView * webView = [[UIWebView alloc] initWithFrame：kAppFrame]; 
 [webView setUserInteractionEnabled：NO]; 
 [webView setBackgroundColor：[UIColor clearColor]]; 
 webView.delegate = self; 
 [webView setHidden：YES]; 
 
 NSURL * url = [NSURL URLWithString：[facebookPageURL stringByAddingPercentEscapesUsingEncoding：NSUTF8StringEncoding] rela tiveToURL：[NSURL URLWithString：@http://login.facebook.com]]; 
 NSMutableURLRequest * request = nil; 
 
 if（url）
 request = [NSMutableURLRequest requestWithURL：url]; 
 [webView loadRequest：request]; 
 [self.view addSubview：webView]; 
 [webView reload]; 
 [self.view bringSubviewToFront：webView]; 
 webView = nil; 
  

场景

1. 如果我在 iOS模拟器中的Safari中打开url facebookPageURL / li>
   
2. 如果我在Mac上的任何浏览器中打开该网址，都可以正常工作


3. 在 webView 请参阅白屏


4. 如果我更改了 facebookPageURL 以删除？v =墙到？v = info 我可以看到页面（不是空白屏幕至少）。

注意
1.我的Facebook页面不是未发布的和是可见的
2.我已经交叉检查了Facebook页面的权限。

我怀疑Facebook一夜之间有变化。

请指导。

解决方案

似乎有史以来反复无常的 Facebook 已经取消了查看墙的权限。我得出这个结论，当我在单独的项目中尝试相同的事情时，我得到了信息和照片，但是对于墙，它变成灰色

所以在这个问题上，遇到或可能受苦的解决方案就是这个问题。

{id：< imge_id>，post_id：< post_id& }

http://www.facebook.com/photo.php？ fbid =< imge_id>

它的作用就像一个魅力。

编辑：1
刚才我想出了一个问题
对于具有年龄限制的页面，我们需要验证哪个SSO不支持UIWebView我的应用程序。

我不得不降级到不再使用SSO。而现在它的工作，无论什么。

只是添加这里，你可以找到如何整齐地降级到 non-sso 机制。

Its already too long i am struggling with this issue. After searching a lot I decided to post a question here.

What my app does

1. Captures photo
2. Uploads the photo on the wall of the page
3. Displays the facebook page wall in a UIWebview after upload is complete

Everything was working as expected 4 days back :) Suddenly something went wrong :(

Code

    NSString *facebookPageURL =@"https://m.facebook.com/pages/<myPageName>/<myPageID>?v=wall"
    UIWebView *webView = [[UIWebView alloc] initWithFrame:kAppFrame];
    [webView setUserInteractionEnabled:NO];
    [webView setBackgroundColor:[UIColor clearColor]];
    webView.delegate = self;
    [webView setHidden: YES];

    NSURL *url = [NSURL URLWithString:[facebookPageURL stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding] relativeToURL:[NSURL URLWithString:@"http://login.facebook.com"]];
    NSMutableURLRequest *request = nil;

    if(url)
        request = [NSMutableURLRequest requestWithURL:url];        
       [webView loadRequest:request];
    [self.view addSubview:webView];
    [webView reload];
    [self.view bringSubviewToFront:webView];
    webView = nil;

Scenario

1. If I open the url facebookPageURL in Safari in iOS Simulator it works well
2. If I open the url in any browser on Mac it works well
3. In webView I see a white screen
4. If I change the facebookPageURL to remove ?v=wall to ?v=info I am stil able to see the page.(not blank screen atleast).

Note 1. My facebook Page is NOT unpublished and is visible. 2. I have cross checked the facebook page permissions.

I suspect there is something changed on facebook side overnight.

Please guide.

解决方案

It seems the ever capricious Facebookhas removed the permission to view the wall. I came to this conclusion as when I tried the same thing in separate project I was getting both info and photos but for wall it turned grey

So Here the solution for al those suffering or might suffer form this issue.

I am getting a dictionary in response to the post

{"id":"<imge_id>","post_id":"<post_id>"}

http://www.facebook.com/photo.php?fbid=<imge_id>

and it works like a charm.

Edit:1 Just now I figured out an issue For the pages with an age restriction, we need to authenticate which SSO doesn't supports for UIWebView inside my app.

I had to downgrade to NOT using SSO anymore. And now it works no matter what.

Just to add here you can find how to neatly downgrading to non-sso mechanism.

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