Question

以下代码应该要求访问权限，然后检索用户的Twitter帐户，以便将该帐户与iOS应用程序同步。我想要做的代码如下。

- (IBAction)connectToTwitter:(id)sender {
    // borrowed from: http://eflorenzano.com/blog/2012/04/18/using-twitter-ios5-integration-single-sign-on/
 ACAccountStore *store = [[ACAccountStore alloc] init];
 ACAccountType *twitterType = [store accountTypeWithAccountTypeIdentifier:ACAccountTypeIdentifierTwitter];
[store requestAccessToAccountsWithType:twitterType options:nil completion:^(BOOL granted, NSError *error) 
{
if(granted) {
// Access has been granted, now we can access the accounts
// Remember that twitterType was instantiated above
NSArray *twitterAccounts = [store accountsWithAccountType:twitterType];

// If there are no accounts, we need to pop up an alert
if(twitterAccounts != nil && [twitterAccounts count] == 0)
 {
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"No Twitter Accounts"
                                                                message:@"There are no Twitter accounts configured. You must add or create a Twitter separately."
                                                               delegate:nil
                                                      cancelButtonTitle:@"OK"
                                                      otherButtonTitles:nil];
                [alert show];
} else {
ACAccount *account = [twitterAccounts objectAtIndex:0];
// Do something with their Twitter account
NSURL *url = [NSURL URLWithString:@"http://api.twitter.com/1/account/verify_credentials.json"];
                SLRequest *req = [SLRequest requestForServiceType:SLServiceTypeTwitter
                                                    requestMethod:SLRequestMethodPOST
                                                              URL:url
                                                       parameters:nil];
// Important: attach the user's Twitter ACAccount object to the request
req.account = account;
[req performRequestWithHandler:^(NSData *responseData,
                                                 NSHTTPURLResponse *urlResponse,
                                                 NSError *error) 
{
 // If there was an error making the request, display a message to the user
if(error != nil) {
  UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Twitter Error"
                                                                        message:@"There was an error talking to Twitter. Please try again later."
                                                                       delegate:nil
                                                              cancelButtonTitle:@"OK"
                                                              otherButtonTitles:nil];
                        [alert show];
                        return;
}
 // Parse the JSON response
 NSError *jsonError = nil;
                    id resp = [NSJSONSerialization JSONObjectWithData:responseData
                                                              options:0
                                                                error:&jsonError];
// If there was an error decoding the JSON, display a message to the user
 if(jsonError != nil)
 {
 UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Twitter Error"
                                                                        message:@"Twitter is not acting properly right now. Please try again later."
                                                                       delegate:nil
                                                              cancelButtonTitle:@"OK"
                                                              otherButtonTitles:nil];
                        [alert show];
                        return;
 }

NSString *screenName = [resp objectForKey:@"screen_name"];
self.twitterHandle = screenName;
PFUser *currentUser = [PFUser currentUser];
PFQuery *query = [PFQuery queryWithClassName:@"_User"];
[query whereKey:@"username" equalTo:currentUser.username];
[query findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
if (!error) {
// Do something with the found objects
for (PFObject *object in objects)
 {
object[@"TwitterHandle"] = self.twitterHandle;
[object saveInBackground];
}
} else {
// Log details of the failure
NSLog(@"Error: %@ %@", error, [error userInfo]);
}
}];
}];
}
}
}];
}

目前，此代码在模拟器中有效，因为它检测到没有Twitter个帐户可供同步。但是，在实际设备上，当Twitter帐户登录手机上的Twitter应用程序时，应用程序会在用户允许访问后崩溃。我不知道代码的问题在哪里。这很困难，因为它在模拟器中运行良好，但你无法下载Twitter以在模拟器上放置帐户。

首先，我的代码有什么问题，我该如何解决？其次，我如何在模拟器中对此进行测试，以便每次进行简单的更改并想要测试时，我都不必将应用程序重新下载到我的设备上？

Answer 1

iOS默认检查iOS设置中的Twitter帐户，而不是Twitter应用程序。检查那里

enter image description here

您可以添加例外断点以找出崩溃的位置。在这里查看我的答案，找到崩溃位置。 Crash that not able to get

编辑：好的，我只是把你的代码自己测试一下。代码中的所有内容都可以检索到此行的信息。

NSString *screenName = [resp objectForKey:@"screen_name"];
self.twitterHandle = screenName;

这就是twitter正确返回数据并且我记录了屏幕名称，我得到了它。

但只有一个小改动verifyCredentials服务是一个GET方法，只需将SLRequest requestMethod更改为SLRequestMethodGET

你已经创建了一个名为PFUser的对象和PFQuery我无法得到那个可能你应该检查

在iOS中访问用户的Twitter帐户

1 个答案: