iOS requestAccessToAccountsWithType未显示权限提示/ NSAlert

Question

这是我的理解，当我调用[ACAccountStore requestAccessToAccountsWithType:options:completion]时，用户应该看到一个UIAlert，询问他们是否授予我的应用程序权限。

当我运行这段代码时，从来没有提示符，granted变量总是"false"

-(void)myfunction { 
if (!_accountStore) _accountStore = [[ACAccountStore alloc] init];
    ACAccountType *fbActType = [_accountStore accountTypeWithAccountTypeIdentifier:ACAccountTypeIdentifierFacebook];

    NSDictionary *options = [[NSDictionary alloc] initWithObjectsAndKeys:
                             (NSString *)ACFacebookAppIdKey, @"##########",  
                             (NSString *)ACFacebookPermissionsKey, [NSArray arrayWithObject:@"email"],  
                             nil];

    [_accountStore requestAccessToAccountsWithType:fbActType options:options completion:^(BOOL granted, NSError *error) {
                                                NSLog(@"Home.m - getFBDetails - Check 2");
                                                if (granted == YES) {
                                                    NSLog(@"Success");
                                                    NSArray *accounts = [_accountStore accountsWithAccountType:fbActType];
                                                    _facebookAccount = [accounts lastObject];                                                    
                                                    [self me];
                                               } else {
                                                    NSLog(@"ERR: %@ ",error);
                                                    // Fail gracefully...
                                              }
            }
     ];
}

我得到错误:ERR: Error Domain=com.apple.accounts Code=8 "The operation couldn’t be completed. (com.apple.accounts error 8.)"

更新:我做了一些测试，如果我使用ACAccountTypeIdentifierTwitter运行，我得到连接到我的Twitter帐户的提示，所以我假设这是我的Facebook设置…

Answer 1

您的选项字典中有反向对象和键:

NSDictionary *options = [[NSDictionary alloc] initWithObjectsAndKeys:
                         @"##########",  ACFacebookAppIdKey,
                         [NSArray arrayWithObject:@"email"], ACFacebookPermissionsKey,
                         nil];

Answer 2

您实际上缺少一个键:ACFacebookAudienceKey。你可以这样修改:

NSDictionary *options = [[NSDictionary alloc] initWithObjectsAndKeys:
                                 (NSString *)ACFacebookAppIdKey, @"##########",  
                                 (NSString *)ACFacebookPermissionsKey, [NSArray arrayWithObject:@"email"],
                                 (NSString *)ACFacebookAudienceKey, ACFacebookAudienceEveryone,
                                 nil];

顺便说一下，当你使用Twitter时，选项必须是nil。