Facebook API 对话框页面在第二次及之后显示错误 [英] Facebook API dialog page showing error in second time and after that

问题描述

我想分享我的应用程序详细信息.我只是按照 facebook 教程中的说明做了.当用户登录和对话框页面出现时，我发布了我的 msg.它只在第一次正常工作.当用户点击按钮时再次分享，出现对话框并显示错误页面

I want to share my app details.I just done as same given in facebook tutorial.When user loggen in and dialog page appears and i posted my msg.and it worked fine for first time only.when user tapped a button to share again,the dialog appears and showing error page

'Your_APP_NAME'出现错误.请稍后再试."

我按照这里下面的 facebook 链接中的教程进行操作.https://developers.facebook.com/docs/mobile/ios/build/

I followed the tutorial in the facebook link below here. https://developers.facebook.com/docs/mobile/ios/build/

这是我的代码.

-(void)buttonPressed:(id)sender{
facebook = [[Facebook alloc] initWithAppId:@"YOUR_APP_ID" andDelegate:self];

 NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
        if ([defaults objectForKey:@"FBAccessTokenKey"] && [defaults objectForKey:@"FBExpirationDateKey"]) {
            facebook.accessToken = [defaults objectForKey:@"FBAccessTokenKey"];
            facebook.expirationDate = [defaults objectForKey:@"FBExpirationDateKey"];
        }
if (![facebook isSessionValid]) {
    [facebook authorize:nil];
}else{
[self postWall];
}
// Pre 4.2 support
- (BOOL)application:(UIApplication *)application handleOpenURL:(NSURL *)url {
    return [facebook handleOpenURL:url]; 
}
- (void)fbDidLogin {
    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
    [defaults setObject:[facebook accessToken] forKey:@"FBAccessTokenKey"];
    [defaults setObject:[facebook expirationDate] forKey:@"FBExpirationDateKey"];
    [defaults synchronize];
    [self postWall];
}
-(void)postWall{

    NSMutableDictionary* params = [NSMutableDictionary dictionaryWithObjectsAndKeys:
                                   kAppId,@"app_id",
                                   @"https://developers.facebook.com/docs/reference/dialogs/",@"link",
                                   @"http://fbrell.com/f8.jpg",@"picture",
                                   @"Facebook Dialogs",@"name",
                                   @"Reference Documentation",@"caption",
                                   @"Using Dialogs to interact with users.",@"description",
                                   @"Facebook Dialogs are so easy!",@"message",
                                   nil];

    [[self facebook] dialog:@"feed" andParams:params andDelegate:self];

}

我在我的视图控制器文件中执行所有这些代码(不在应用程序委托中).我只想在按下按钮时打开 facebook..所以我将这些代码放在我的按钮按下方法中.

I do all this code in my viewcontroller file(Not in app delegate).I want to open facebook only when i press the button..So i put these codings in my buttonpressed method.

推荐答案

尝试删除

kAppId,@"app_id"

来自您的 NSMutableDictionary 参数

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