Twitter上有Firebase iOS简单登录示例吗？

我很难从简单的登录iOS中找到以下问题的解决方案：

由于一台设备可能连接多个Twitter帐户，因此您需要提供一个块，该块可用于确定登录哪个帐户。将下面的“[yourApp selectUserName:UserName]”替换为您自己的代码，以便从用户名列表中进行选择

这是提供的代码：

[authClient loginToTwitterAppWithId:@"YOUR_CONSUMER_KEY"
multipleAccountsHandler:^int(NSArray *usernames) {

// If you do not wish to authenticate with any of these usernames, return NSNotFound.
return [yourApp selectUserName:usernames];
} withCompletionBlock:^(NSError *error, FAUser *user) {
    if (error != nil) {
        // There was an error authenticating
    } else {
        // We have an authenticated Twitter user
    }
}];

允许用户选择使用哪个帐户的UIActionSheet是最好的吗？那怎么办

#import <Twitter/Twitter.h>
#import <Accounts/Accounts.h>

它将打开一个操作表，显示设备拥有的帐户列表

投寄：

您的iPhone设备上必须至少添加一个有效的twitter帐户

if ([SLComposeViewController isAvailableForServiceType:SLServiceTypeTwitter])
{

  NSString *initialText=@"Text to be posted";


    SLComposeViewController *tweetSheet = [SLComposeViewController composeViewControllerForServiceType:SLServiceTypeTwitter];

    tweetSheet.completionHandler = ^(SLComposeViewControllerResult result) {


        switch(result) {
                //  This means the user cancelled without sending the Tweet
        case SLComposeViewControllerResultCancelled:{

        }
        break;

        case SLComposeViewControllerResultDone:{



    }
                break;
    }

    };
    [tweetSheet setInitialText:initialText];
    if (initialText) {


        [self presentViewController:tweetSheet animated:YES completion:nil];

    }

}

---

我发现了一个很好的例子，说明了如何使用的代码实现这一点。它使用UIActionSheet，就像我尝试的那样

//-------------------------------------------------------------------------------------------------------------------------------------------------
- (IBAction)actionTwitter:(id)sender
//-------------------------------------------------------------------------------------------------------------------------------------------------
{
    [ProgressHUD show:@"In progress..." Interaction:NO];
    //---------------------------------------------------------------------------------------------------------------------------------------------
    selected = 0;
    //---------------------------------------------------------------------------------------------------------------------------------------------
    ACAccountStore *account = [[ACAccountStore alloc] init];
    ACAccountType *accountType = [account accountTypeWithAccountTypeIdentifier:ACAccountTypeIdentifierTwitter];
    //---------------------------------------------------------------------------------------------------------------------------------------------
    [account requestAccessToAccountsWithType:accountType options:nil completion:^(BOOL granted, NSError *error)
    {
        if (granted)
        {
            accounts = [account accountsWithAccountType:accountType];
            //-------------------------------------------------------------------------------------------------------------------------------------
            if ([accounts count] == 0)
                [self performSelectorOnMainThread:@selector(showError:) withObject:@"No Twitter account was found" waitUntilDone:NO];
            //-------------------------------------------------------------------------------------------------------------------------------------
            if ([accounts count] == 1)  [self performSelectorOnMainThread:@selector(loginTwitter) withObject:nil waitUntilDone:NO];
            if ([accounts count] >= 2)  [self performSelectorOnMainThread:@selector(selectTwitter) withObject:nil waitUntilDone:NO];
        }
        else [self performSelectorOnMainThread:@selector(showError:) withObject:@"Access to Twitter account was not granted" waitUntilDone:NO];
    }];
}

//-------------------------------------------------------------------------------------------------------------------------------------------------
- (void)selectTwitter
//-------------------------------------------------------------------------------------------------------------------------------------------------
{
    UIActionSheet *action = [[UIActionSheet alloc] initWithTitle:@"Choose Twitter account" delegate:self cancelButtonTitle:nil
                                          destructiveButtonTitle:nil otherButtonTitles:nil];
    //---------------------------------------------------------------------------------------------------------------------------------------------
    for (NSInteger i=0; i<[accounts count]; i++)
    {
        ACAccount *account = [accounts objectAtIndex:i];
        [action addButtonWithTitle:account.username];
    }
    //---------------------------------------------------------------------------------------------------------------------------------------------
    [action addButtonWithTitle:@"Cancel"];
    action.cancelButtonIndex = accounts.count;
    [action showInView:self.view];
}

//-------------------------------------------------------------------------------------------------------------------------------------------------
- (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex
//-------------------------------------------------------------------------------------------------------------------------------------------------
{
    if (buttonIndex != actionSheet.cancelButtonIndex)
    {
        selected = buttonIndex;
        [self loginTwitter];
    }
    else [ProgressHUD dismiss];
}

//-------------------------------------------------------------------------------------------------------------------------------------------------
- (void)loginTwitter
//-------------------------------------------------------------------------------------------------------------------------------------------------
{
    Firebase *ref = [[Firebase alloc] initWithUrl:FIREBASE];
    FirebaseSimpleLogin *authClient = [[FirebaseSimpleLogin alloc] initWithRef:ref];
    //---------------------------------------------------------------------------------------------------------------------------------------------
    [authClient loginToTwitterAppWithId:TWITTER_KEY multipleAccountsHandler:^int(NSArray *usernames)
    {
        return (int) selected;
    }
    withCompletionBlock:^(NSError *error, FAUser *user)
    {
        if (error == nil)
        {
            if (user != nil) [delegate didFinishLogin:ParseUserData(user.thirdPartyUserData)];
            [self dismissViewControllerAnimated:YES completion:^{ [ProgressHUD dismiss]; }];
        }
        else
        {
            NSString *message = [error.userInfo valueForKey:@"NSLocalizedDescription"];
            [self performSelectorOnMainThread:@selector(showError:) withObject:message waitUntilDone:NO];
        }
    }];
}

//-------------------------------------------------------------------------------------------------------------------------------------------------
-（iAction）actionTwitter:（id）发件人
//-------------------------------------------------------------------------------------------------------------------------------------------------
{
[ProgressHUD show:@“正在进行…”交互：否]；
//---------------------------------------------------------------------------------------------------------------------------------------------
所选=0；
//---------------------------------------------------------------------------------------------------------------------------------------------
ACAccountStore*account=[[ACAccountStore alloc]init]；
ACAccountType*accountType=[帐户类型WithAccountTypeIdentifier:ACAccountTypeIdentifierWitter]；
//---------------------------------------------------------------------------------------------------------------------------------------------
[account requestAccessToAccountsWithType:accountType选项：无完成：^（已授予BOOL，N错误*错误）
{
如果（授予）
{
accounts=[accounts accountsWithAccountType:accountType]；
//-------------------------------------------------------------------------------------------------------------------------------------
如果（[帐户计数]==0）
[self-performSelectorOnMainThread:@selector（淋浴错误：）with object:@“未找到Twitter帐户”waitUntilDone:No]；
//-------------------------------------------------------------------------------------------------------------------------------------
如果（[accounts count]==1）[自执行SelectorOnMainThread:@selector（LoginWitter），对象为nil waitUntilDone:NO]；
如果（[accounts count]>=2）[自执行SelectorOnMainThread:@selector（selectTwitter）with object:nil waitUntilDone:NO]；
}
else[self-performSelectorOnMainThread:@selector（淋浴错误：）with object:@“未授予对Twitter帐户的访问权”waitUntilDone:NO]；
}];
}
//-------------------------------------------------------------------------------------------------------------------------------------------------
-（无效）选择Twitter
//-------------------------------------------------------------------------------------------------------------------------------------------------
{
UIActionSheet*action=[[UIActionSheet alloc]initWithTitle:@“选择Twitter帐户”委托：自我取消按钮：nil
破坏性按钮：无其他按钮：无]；
//---------------------------------------------------------------------------------------------------------------------------------------------
对于（NSInteger i=0；i），最新的iOS 8 beta版似乎无法实现此功能。苹果公司已弃用UIActionSheet，转而支持UIAlertViewController。
//-------------------------------------------------------------------------------------------------------------------------------------------------
- (IBAction)actionTwitter:(id)sender
//-------------------------------------------------------------------------------------------------------------------------------------------------
{
    [ProgressHUD show:@"In progress..." Interaction:NO];
    //---------------------------------------------------------------------------------------------------------------------------------------------
    selected = 0;
    //---------------------------------------------------------------------------------------------------------------------------------------------
    ACAccountStore *account = [[ACAccountStore alloc] init];
    ACAccountType *accountType = [account accountTypeWithAccountTypeIdentifier:ACAccountTypeIdentifierTwitter];
    //---------------------------------------------------------------------------------------------------------------------------------------------
    [account requestAccessToAccountsWithType:accountType options:nil completion:^(BOOL granted, NSError *error)
    {
        if (granted)
        {
            accounts = [account accountsWithAccountType:accountType];
            //-------------------------------------------------------------------------------------------------------------------------------------
            if ([accounts count] == 0)
                [self performSelectorOnMainThread:@selector(showError:) withObject:@"No Twitter account was found" waitUntilDone:NO];
            //-------------------------------------------------------------------------------------------------------------------------------------
            if ([accounts count] == 1)  [self performSelectorOnMainThread:@selector(loginTwitter) withObject:nil waitUntilDone:NO];
            if ([accounts count] >= 2)  [self performSelectorOnMainThread:@selector(selectTwitter) withObject:nil waitUntilDone:NO];
        }
        else [self performSelectorOnMainThread:@selector(showError:) withObject:@"Access to Twitter account was not granted" waitUntilDone:NO];
    }];
}

//-------------------------------------------------------------------------------------------------------------------------------------------------
- (void)selectTwitter
//-------------------------------------------------------------------------------------------------------------------------------------------------
{
    UIActionSheet *action = [[UIActionSheet alloc] initWithTitle:@"Choose Twitter account" delegate:self cancelButtonTitle:nil
                                          destructiveButtonTitle:nil otherButtonTitles:nil];
    //---------------------------------------------------------------------------------------------------------------------------------------------
    for (NSInteger i=0; i<[accounts count]; i++)
    {
        ACAccount *account = [accounts objectAtIndex:i];
        [action addButtonWithTitle:account.username];
    }
    //---------------------------------------------------------------------------------------------------------------------------------------------
    [action addButtonWithTitle:@"Cancel"];
    action.cancelButtonIndex = accounts.count;
    [action showInView:self.view];
}

//-------------------------------------------------------------------------------------------------------------------------------------------------
- (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex
//-------------------------------------------------------------------------------------------------------------------------------------------------
{
    if (buttonIndex != actionSheet.cancelButtonIndex)
    {
        selected = buttonIndex;
        [self loginTwitter];
    }
    else [ProgressHUD dismiss];
}

//-------------------------------------------------------------------------------------------------------------------------------------------------
- (void)loginTwitter
//-------------------------------------------------------------------------------------------------------------------------------------------------
{
    Firebase *ref = [[Firebase alloc] initWithUrl:FIREBASE];
    FirebaseSimpleLogin *authClient = [[FirebaseSimpleLogin alloc] initWithRef:ref];
    //---------------------------------------------------------------------------------------------------------------------------------------------
    [authClient loginToTwitterAppWithId:TWITTER_KEY multipleAccountsHandler:^int(NSArray *usernames)
    {
        return (int) selected;
    }
    withCompletionBlock:^(NSError *error, FAUser *user)
    {
        if (error == nil)
        {
            if (user != nil) [delegate didFinishLogin:ParseUserData(user.thirdPartyUserData)];
            [self dismissViewControllerAnimated:YES completion:^{ [ProgressHUD dismiss]; }];
        }
        else
        {
            NSString *message = [error.userInfo valueForKey:@"NSLocalizedDescription"];
            [self performSelectorOnMainThread:@selector(showError:) withObject:message waitUntilDone:NO];
        }
    }];
}