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2014/10/15 ¤U¤È 10:14:41
iphone Programming Glossary: synchronousNSManagedObjectContext performBlockAndWait: doesn't execute on background thread? http://stackoverflow.com/questions/11831946/nsmanagedobjectcontext-performblockandwait-doesnt-execute-on-background-thread answer to try an explain why performBlockAndWait will always run in the calling thread. performBlock is completely asynchronous. It will always enqueue the block onto the queue of the receiving MOC and then return immediately. Thus moc performBlock.. moc performBlock ^ Foo moc performBlock ^ Bar will place two blocks on the queue for moc. They will always execute asynchronously. Some unknown thread will pull blocks off of the queue and execute them. In addition those blocks are wrapped within their.. a complete Core Data user event processPendingChanges . performBlockAndWait does NOT use the internal queue. It is a synchronous operation that executes in the context of the calling thread. Of course it will wait until the current operations on the..
Verify receipt for in App purchase http://stackoverflow.com/questions/1298998/verify-receipt-for-in-app-purchase or maybe it's server specific. Readers Advisement welcome on this part There may also be some balking at making this a synchronous request. You may want to post it asynchronously and put up the ol' UIActivityIndicatorView or some other HUD. Case in point.. welcome on this part There may also be some balking at making this a synchronous request. You may want to post it asynchronously and put up the ol' UIActivityIndicatorView or some other HUD. Case in point That initWithData encoding call takes a loooooong..
How can you read a files MIME-type in objective-c http://stackoverflow.com/questions/1363813/how-can-you-read-a-files-mime-type-in-objective-c as well you should use the commented out NSURLRequest. Make sure to perform the request in a thread though since it's synchronous. NSString filePath NSBundle mainBundle pathForResource @ imagename ofType @ jpg NSString fullPath filePath stringByExpandingTildeInPath..
Asynchronous methods in NSOperation http://stackoverflow.com/questions/1596160/asynchronous-methods-in-nsoperation methods in NSOperation I'm fetching some data from Facebook Connect using the FBConnect Objective C 2.0 framework and I'm.. several other operations that run as well and this is one of them. The problem is that all the FBConnect calls are asynchronous. Because of this the main method of the NSOperation quickly finishes and the operation is marked as completed. Is there.. finishes and the operation is marked as completed. Is there some way to overcome this It would appear there are no synchronous options in FBConnect Many thanks Mike iphone asynchronous nsoperation fbconnect share improve this question Dave Dribin..
NSURLConnection and Basic HTTP Authentication http://stackoverflow.com/questions/1973325/nsurlconnection-and-basic-http-authentication no need for a challenge from the server for authorization. First question 1 Does NSURLConnection have to be set as synchronous to do Basic Auth According to the answer on this post it seems that you can't do Basic Auth if you opt for the async route... for an authorized resource from the server . iphone objective c share improve this question I'm using an asynchronous connection with MGTwitterEngine and it sets the authorization in the NSMutableURLRequest theRequest like so NSString authStr..
Pattern for wrapping an Asynchronous JavaScript function to make it synchronous http://stackoverflow.com/questions/214491/pattern-for-wrapping-an-asynchronous-javascript-function-to-make-it-synchronous for wrapping an Asynchronous JavaScript function to make it synchronous I'm working with a JavaScript API where most of the functions are asynchronous... for wrapping an Asynchronous JavaScript function to make it synchronous I'm working with a JavaScript API where most of the functions are asynchronous. The API is the WebKit JavaScript Database.. JavaScript function to make it synchronous I'm working with a JavaScript API where most of the functions are asynchronous. The API is the WebKit JavaScript Database API which is a binding to a subset of functionality to manipulate SQLite3 databases...
How to unit test asynchronous APIs? http://stackoverflow.com/questions/2162213/how-to-unit-test-asynchronous-apis to unit test asynchronous APIs I have installed Google Toolbox for Mac into Xcode and followed the instructions to set up unit testing found here.. Mac into Xcode and followed the instructions to set up unit testing found here . It all works great and I can test my synchronous methods on all my objects absolutely fine. However most of the complex APIs I actually want to test return results asynchronously.. methods on all my objects absolutely fine. However most of the complex APIs I actually want to test return results asynchronously via calling a method on a delegate for example a call to a file download and update system will return immediately and..
Does NSURLConnection block the main thread? http://stackoverflow.com/questions/3364021/does-nsurlconnection-block-the-main-thread iphone multithreading nsurlconnection share improve this question NSURLConnection supports two modes of operation asynchronous and synchronous. Neither uses separate threads at all. They both use just one thread that being whatever thread you run.. nsurlconnection share improve this question NSURLConnection supports two modes of operation asynchronous and synchronous. Neither uses separate threads at all. They both use just one thread that being whatever thread you run them in. In synchronous.. Neither uses separate threads at all. They both use just one thread that being whatever thread you run them in. In synchronous mode NSURLConnection will block whatever thread you run it in. Asynchronous mode uses the run loop to behave from the developer's..
iOS: How can i receive HTTP 401 instead of -1012 NSURLErrorUserCancelledAuthentication http://stackoverflow.com/questions/3912532/ios-how-can-i-receive-http-401-instead-of-1012-nsurlerrorusercancelledauthenti the original 401 http packet iphone http ios nsurlconnection share improve this question Yes. Stop using the synchronous API. If you use the asynchronous delegate based API then you have a lot more control over the connection. With this API.. iphone http ios nsurlconnection share improve this question Yes. Stop using the synchronous API. If you use the asynchronous delegate based API then you have a lot more control over the connection. With this API except in cases where an error is..
How should I architect my iPhone app to talk to my website? http://stackoverflow.com/questions/3943597/how-should-i-architect-my-iphone-app-to-talk-to-my-website the model. Create another class for updating the model fetching the XMLs from web app. Do not even consider using synchronous connections not even from a dedicated thread. Asynchronous connections with delegate is the way to go. Sometimes multiple.. fetching the XMLs from web app. Do not even consider using synchronous connections not even from a dedicated thread. Asynchronous connections with delegate is the way to go. Sometimes multiple requests need to be made to get all required data. You might..
Passing array between view controllers? http://stackoverflow.com/questions/4478511/passing-array-between-view-controllers controller. If you want to get really fancy use an NSOperation to encapsulate the download then you would use the a synchronous variant of NSURLConnection because the operation itself is already executed asynchronously The nice thing would be then.. then you would use the a synchronous variant of NSURLConnection because the operation itself is already executed asynchronously The nice thing would be then if your parsing of the JSON string takes longer also this is performed in the background..
NSURLConnection and grand central dispatch http://stackoverflow.com/questions/5037545/nsurlconnection-and-grand-central-dispatch queue I need to ensure that my connections are not happening on the main thread and the connections need to be asynchronous. I also need several simultaneous requests to go at once. If I go the gcd route I'm not sure which thread the NSUrlConnectionDelegate.. didFailWithError NSError error void connectionDidFinishLoading NSURLConnection connection Should I just call the synchronous versions but wrapped in gcd blocks And if I want to cancel a call use 'dispatch_suspend' dispatch_async queue ^ NSString.. Network Apps for iPhone OS Part 2 The lecturer said Threads Are Evil for network programming and recommended to use asynchronous network programming with RunLoop. Use background thread Grand Central Dispatch Concurrent Queue for thread safe data processing..
iOS: how to perform an HTTP POST request? http://stackoverflow.com/questions/5537297/ios-how-to-perform-an-http-post-request response error NSError error This returns a NSData variable that you can process. IMPORTANT Remember to kick off the synchronous request in a separate thread to avoid blocking the UI. Asynchronously void start Don't forget to set your NSURLConnection's.. can process. IMPORTANT Remember to kick off the synchronous request in a separate thread to avoid blocking the UI. Asynchronously void start Don't forget to set your NSURLConnection's delegate to handle the connection as follows void connection NSURLConnection..
NSURLRequest - encode url for NSURLRequest POST Body (iPhone objective-C) http://stackoverflow.com/questions/787582/nsurlrequest-encode-url-for-nsurlrequest-post-body-iphone-objective-c http share improve this question Consider using Ben Copsey's ASIHTTPRequest framework for generating and sending synchronous and asynchronous HTTTP requests POST and GET ASIFormDataRequest request ASIFormDataRequest alloc initWithURL @ http someSite.com.. this question Consider using Ben Copsey's ASIHTTPRequest framework for generating and sending synchronous and asynchronous HTTTP requests POST and GET ASIFormDataRequest request ASIFormDataRequest alloc initWithURL @ http someSite.com autorelease..
Why does Apple recommend to use dispatch_once for implementing the singleton pattern under ARC? http://stackoverflow.com/questions/9119042/why-does-apple-recommend-to-use-dispatch-once-for-implementing-the-singleton-pat init Do any other initialisation stuff here return sharedInstance Isn't it a bad idea to instantiate the singleton asynchronously in the background I mean what happens if I request that shared instance and rely on it immediately but dispatch_once takes.. iphone objective c ios singleton automatic ref counting share improve this question dispatch_once is absolutely synchronous. Not all GCD methods do things asynchronously case in point dispatch_sync is synchronous . The use of dispatch_once replaces.. ref counting share improve this question dispatch_once is absolutely synchronous. Not all GCD methods do things asynchronously case in point dispatch_sync is synchronous . The use of dispatch_once replaces the following idiom MyClass sharedInstance..
Basic HTTP Authentication on iPhone http://stackoverflow.com/questions/993409/basic-http-authentication-on-iphone authentication share improve this question Two things. Firstly you have to use the async methods rather than the synchronous class method. NSURLRequest theRequest NSURLRequest requestWithURL NSURL URLWithString req cachePolicy NSURLRequestUseProtocolCachePolicy..
what exactly NSUrlConnection ASynchronous means? http://stackoverflow.com/questions/1707253/what-exactly-nsurlconnection-asynchronous-means exactly NSUrlConnection ASynchronous means i am getting confused what is the difference between Synchronous NSUrlConnection and ASynchronous NSUrlConnection.. exactly NSUrlConnection ASynchronous means i am getting confused what is the difference between Synchronous NSUrlConnection and ASynchronous NSUrlConnection is there Synchronous or ASynchronous if we use detachNewThreadSelector.. ASynchronous means i am getting confused what is the difference between Synchronous NSUrlConnection and ASynchronous NSUrlConnection is there Synchronous or ASynchronous if we use detachNewThreadSelector in connectionDidFinishLoading method..
Asynchronous vs Synchronous vs Threading in an iPhone App http://stackoverflow.com/questions/371638/asynchronous-vs-synchronous-vs-threading-in-an-iphone-app vs Synchronous vs Threading in an iPhone App I'm in the design stage for an app which will utilize a REST web service and sort of have..
Implementing Delegate Pattern in Objective-C http://stackoverflow.com/questions/455822/implementing-delegate-pattern-in-objective-c
how to use sendAsynchronousRequest:queue:completionHandler: http://stackoverflow.com/questions/9270447/how-to-use-sendasynchronousrequestqueuecompletionhandler to use sendAsynchronousRequest queue completionHandler Two part question Part one I am trying to create an ASynchronous request to my database. I am currently doing it Synchronously however I want to learn both ways to better my understanding.. Two part question Part one I am trying to create an ASynchronous request to my database. I am currently doing it Synchronously however I want to learn both ways to better my understanding of whats going on. Currently I have set up my Synchronous.. however I want to learn both ways to better my understanding of whats going on. Currently I have set up my Synchronous call like this. IBAction setRequestString NSString string Set database address NSMutableString databaseURL NSMutableString..
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