我在简单登录iOS快速入门中遇到了以下问题:
由于一个设备可能有多个Twitter帐户，您将需要提供一个块，可用于确定登录哪个帐户。将下面的"[yourApp selectUserName:usernames]"替换为您自己的代码，从用户名列表中选择。
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
}
}];
一个UIActionSheet允许用户选择使用哪个帐户是最好的吗?如何做到这一点呢?
#import <Twitter/Twitter.h>
#import <Accounts/Accounts.h>
ACAccountStore *accountStore = [[ACAccountStore alloc] init];
// Create an account type that ensures Twitter accounts are retrieved.
ACAccountType *accountType = [accountStore accountTypeWithAccountTypeIdentifier:ACAccountTypeIdentifierTwitter];
[accountStore requestAccessToAccountsWithType:accountType options:nil completion:^(BOOL granted, NSError *error) {
// Request access from the user to use their Twitter accounts.
// [accountStore requestAccessToAccountsWithType:accountType withCompletionHandler:^(BOOL granted, NSError *error) {
//NSLog(@"%@",error);
if(granted) {
// Get the list of Twitter accounts.
NSArray *accountsArray = [accountStore accountsWithAccountType:accountType];
//NSLog(@"%@",accountsArray);
twitterAccountsArray=[accountsArray mutableCopy];
if ([twitterAccountsArray count] > 0){
sheet = [[UIActionSheet alloc] initWithTitle:@"Choose an Account" delegate:self cancelButtonTitle:nil destructiveButtonTitle:nil otherButtonTitles:nil];
for (ACAccount *acct in twitterAccountsArray) {
[sheet addButtonWithTitle:acct.username];
}
}
}
else{
dispatch_async(dispatch_get_main_queue(), ^{
//NSLog(@"%@",error);
if (![error.localizedDescription isEqual:[NSNull null]] &&[error.localizedDescription isEqualToString:@"No access plugin was found that supports the account type com.apple.twitter"]) {
}
else
[Utility showAlertWithString:@"We could not find any Twitter account on the device"];
});
}
}];
它将打开一个操作表，显示您的设备所拥有的帐户列表。
发帖:
必须在您的iPhone设备上添加至少一个有效的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，如何用Awesome Chat的代码做到这一点。它使用了一个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];
}
}];
}