Twitter iOS Streaming API：未收到任何数据 [英] Twitter iOS Streaming API: no data being received
问题描述
我正在尝试修改Apple的示例代码以使用Twitter API，以便我可以使用流API来过滤推文。我正在尝试实施针对此问题建议的方法：
I'm trying to modify Apple's sample code for using the Twitter API so that I can use the streaming API to filter tweets. I am attempting to implement the method suggested in response to this question:
我创建了签名的NSURLRequest和NSURLConnection对象如建议的那样，并设置连接对象的委托。选择有效的Twitter帐户并用于对URL进行签名。问题是委托连接：didReceiveData：方法永远不会被调用。
I have created the signed NSURLRequest and NSURLConnection objects as suggested, and set the delegate for the connection object. A valid twitter account is selected and used to sign the url. The problem is that the delegates connection:didReceiveData: method is never being called.
这是我的代码：
@implementation Twitter
-(id)init{
if (self=[super init]) {
NSLog(@"Twitter init");
// Tell the notification centre to inform the app if the twitter account changes
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(twitterAccountChanged)
name:ACAccountStoreDidChangeNotification object:nil];
// Create an account store object.
ACAccountStore *accountStore = [[ACAccountStore alloc] init];
// Create an account type that ensures Twitter accounts are retrieved.
ACAccountType *accountType = [accountStore accountTypeWithAccountTypeIdentifier:ACAccountTypeIdentifierTwitter];
// Request access from the user to use their Twitter accounts.
[accountStore requestAccessToAccountsWithType:accountType withCompletionHandler:^(BOOL granted, NSError *error) {
if(granted) {
NSLog(@"Twitter: Access to twitter accounts granted");
// Get the list of Twitter accounts.
NSArray *accountsArray = [accountStore accountsWithAccountType:accountType];
// Pick the twitter account to use
if ([accountsArray count] > 0) {
// Grab the initial Twitter account to tweet from.
ACAccount *twitterAccount = [accountsArray objectAtIndex:0];
// This is for a status filter
NSURL *url=[NSURL URLWithString:@"https://stream.twitter.com/1/statuses/filter.json"];
// Create the parameters dictionary
NSDictionary *dictionary=[NSDictionary dictionaryWithObjectsAndKeys:@"twitter", @"track", nil];
// Create TWRequest object
TWRequest *req=[[TWRequest alloc] initWithURL:url parameters:dictionary requestMethod:TWRequestMethodPOST];
// Set the account
[req setAccount:twitterAccount];
// Get a signed URL request
NSURLRequest *signedRequest=[req signedURLRequest];
// Initate the connection
[NSURLConnection connectionWithRequest:signedRequest delegate:self];
} else {
NSLog(@"Twitter: No twitter accounts to access");
}
} else {
NSLog(@"Twitter: Access to twitter accounts denied");
}
}];
return self;
}
return nil;
}
-(void)twitterAccountChanged{
NSLog(@"Twitter twitterAccountChanged");
}
-(void) connection:(NSURLConnection *)connection didReceiveData:(NSData *)data{
NSLog(@"data received");
}
该计划的输出是：
2012-07-24 09:50:03.668 TwitterAPITest[36722:10403] Twitter init
2012-07-24 09:50:03.836 TwitterAPITest[36722:11d03] Twitter: Access to twitter accounts granted
如你所见，一切似乎都正常，唯一的问题是委托方法永远不会被调用，我目前不知道为什么。
As you can see, everything appears to work OK, the only problem is that the delegate method is never called and I currently have no idea why.
任何帮助都会非常感激......
Any help would be much appreciated...
迈克
推荐答案
我花了一些时间来启动并运行，所以我我以为我要为别人发布我的代码。在我的情况下，我试图让推文接近某个位置，所以你会看到我使用 locations 参数和我在范围内的位置结构。你可以在params字典中添加你想要的任何参数。
It took me a bit of time to get this up and running, So I thought I aught to post my code for others. In my case I was trying to get tweets close to a certain location, so you will see that I used a locations parameter and a location struct I had in scope. You can add whatever params you want to the params dictionary.
另请注意，这很简单，您需要做一些事情，例如通知用户未找到帐户，并允许用户选择Twitter帐户他们想使用多个账户。
Also note that this is bare bones, and you will want to do things such as notify the user that an account was not found and allow the user to select the twitter account they would like to use if multiple accounts exist.
快乐流媒体！
//First, we need to obtain the account instance for the user's Twitter account
ACAccountStore *store = [[ACAccountStore alloc] init];
ACAccountType *twitterAccountType = [store accountTypeWithAccountTypeIdentifier:ACAccountTypeIdentifierTwitter];
// Request permission from the user to access the available Twitter accounts
[store requestAccessToAccountsWithType:twitterAccountType
withCompletionHandler:^(BOOL granted, NSError *error) {
if (!granted) {
// The user rejected your request
NSLog(@"User rejected access to the account.");
}
else {
// Grab the available accounts
NSArray *twitterAccounts = [store accountsWithAccountType:twitterAccountType];
if ([twitterAccounts count] > 0) {
// Use the first account for simplicity
ACAccount *account = [twitterAccounts objectAtIndex:0];
NSMutableDictionary *params = [[NSMutableDictionary alloc] init];
[params setObject:@"1" forKey:@"include_entities"];
[params setObject:location forKey:@"locations"];
[params setObject:@"true" forKey:@"stall_warnings"];
//set any other criteria to track
//params setObject:@"words, to, track" forKey@"track"];
// The endpoint that we wish to call
NSURL *url = [NSURL URLWithString:@"https://stream.twitter.com/1.1/statuses/filter.json"];
// Build the request with our parameter
TWRequest *request = [[TWRequest alloc] initWithURL:url
parameters:params
requestMethod:TWRequestMethodPOST];
// Attach the account object to this request
[request setAccount:account];
NSURLRequest *signedReq = request.signedURLRequest;
// make the connection, ensuring that it is made on the main runloop
self.twitterConnection = [[NSURLConnection alloc] initWithRequest:signedReq delegate:self startImmediately: NO];
[self.twitterConnection scheduleInRunLoop:[NSRunLoop mainRunLoop]
forMode:NSDefaultRunLoopMode];
[self.twitterConnection start];
} // if ([twitterAccounts count] > 0)
} // if (granted)
}];
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