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2014/10/15 ¤U¤È 10:04:58
iphone Programming Glossary: centralWhy should I use Core Data for my iPhone app? http://stackoverflow.com/questions/1883879/why-should-i-use-core-data-for-my-iphone-app can't clearly explain why. Please excuse the following obfuscation .. the app needs to retrieve a list of foos from a central server. Users can then add a bar from a list of bars to the foos then add a baz from a list of bazes to the bar then add.. baz. Once the user is happy with their bar and baz work they then hit a sync button to upload their data back to the central server. As you can see it's a simple data driven drill down app but I'm still not sure I can justify using Core Data with..
Writing an app to stream video to iPhone http://stackoverflow.com/questions/2978405/writing-an-app-to-stream-video-to-iphone an app to stream video to iPhone I'm interested in creating an iPhone app that can stream video from a central server YouTube style. I was wondering if anyone has ever tried to do this before what is the path of least resistant existing..
NSThread vs. NSOperationQueue vs. ??? on the iPhone http://stackoverflow.com/questions/3041837/nsthread-vs-nsoperationqueue-vs-on-the-iphone and my tests clean organized and happily asynchronous. A Would subclass again iphone nsthread nsoperationqueue grand central dispatch share improve this question In general you'll get better mileage with NSOperationQueue . Three specific reasons..
UITextView with Syntax Highlighting [duplicate] http://stackoverflow.com/questions/3642540/uitextview-with-syntax-highlighting only badly documented. No text selection etc see above . So here we are. Two fully functional components that lack a central function and two partial solutions that lack the missing link. Here are all viable approaches I can come up with Have the..
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 built to be paired with a public facing web application that is already built in PHP. I'd like the web platform to be central data is housed in a mySQL database and have the iPhone clients talk to it and use REST'ful methods to perform the functions..
How do you trigger a block after a delay, like -performSelector:withObject:afterDelay:? http://stackoverflow.com/questions/4139219/how-do-you-trigger-a-block-after-a-delay-like-performselectorwithobjectafter withObject afterDelay but with an argument like int double float iphone objective c objective c blocks grand central dispatch share improve this question I think you're looking for dispatch_after . It requires your block to accept no..
Do you need to create an NSAutoreleasePool within a block in GCD? http://stackoverflow.com/questions/4141123/do-you-need-to-create-an-nsautoreleasepool-within-a-block-in-gcd on this so I was wondering if someone could point out where this is stated. iphone objective c cocoa osx grand central dispatch share improve this question Does the same rule apply to a block that is placed within a Grand Central Dispatch.. do you need to create an NSAutoreleasePool within each block you dispatch to anything other than the main queue Grand central dispatch will manage an autorelease pool per queue automatically. However there are no guarantees as to when the pool will..
Grand Central Dispatch (GCD) with CoreData http://stackoverflow.com/questions/4264540/grand-central-dispatch-gcd-with-coredata that update the NSManagedObject might take 2 3 seconds. Please advise. iphone core data objective c blocks grand central dispatch share improve this question As you probably know or have noticed you must perform UI operations on the main..
NSURLConnection and grand central dispatch http://stackoverflow.com/questions/5037545/nsurlconnection-and-grand-central-dispatch and grand central dispatch Is it advisable to wrap up NSUrlConnection in a gcd style blocks and run it on a low_priority queue I need to.. self mySynchronousHttp someURLToInvoke If I need to cancel dispatch_suspend queue iphone nsurlconnection grand central dispatch share improve this question I recommend you to see WWDC Sessions about network application in iPhone OS. WWDC..
Grand Central Dispatch (GCD) vs. performSelector - need a better explanation http://stackoverflow.com/questions/5225130/grand-central-dispatch-gcd-vs-performselector-need-a-better-explanation a lot of documentation on them but have yet to see a definitive answer. iphone objective c multithreading ios grand central dispatch share improve this question performSelectorOnMainThread does not use GCD to send messages to objects on the..
Can you use cancel/isCancelled with GCD/dispatch_async? http://stackoverflow.com/questions/5449469/can-you-use-cancel-iscancelled-with-gcd-dispatch-async open when you break out of the BG process. Hope it helps someone sometime iphone multithreading ios nsoperation grand central dispatch share improve this question GCD does not have built in support for cancellation if it's important to be able..
Am I abusing UIViewController Subclassing? http://stackoverflow.com/questions/5691226/am-i-abusing-uiviewcontroller-subclassing root view of a much larger view hierarchy that is also managed by the view controller. The view controller acts as the central coordinating agent for the view hierarchy handling exchanges between its views and any relevant controller or data objects...
What is the AppDelegate for and how do I know when to use it? http://stackoverflow.com/questions/652460/what-is-the-appdelegate-for-and-how-do-i-know-when-to-use-it the term heart of your application . What I mean by this is that I think you should avoid lumping too many things in a central location good program design normally involves separating functionality by area of concern . A delegate object is an object.. their AppDelegate because they are lazy or they think the AppDelegate controls the whole program. You should avoid centralizing in your AppDelegate since it muddies the areas of concern in the app and doesn't scale. share improve this answer..
Core Data and threads / Grand Central Dispatch http://stackoverflow.com/questions/7540801/core-data-and-threads-grand-central-dispatch and update the UI without blocking the UI while saving the 40.000 objects iphone ios multithreading core data grand central dispatch share improve this question Here's a good example for you to try. Feel free to come back if you have any questions..
Last In-First Out Stack with GCD? http://stackoverflow.com/questions/7567827/last-in-first-out-stack-with-gcd original question as well as the best solution I ended up implementing... iphone objective c ios uitableview grand central dispatch share improve this question Because of the memory constraints of the device you should load the images on demand..
Correct Singleton Pattern Objective C (iOS)? http://stackoverflow.com/questions/7598820/correct-singleton-pattern-objective-c-ios me if I've missing something or doing something completely wrong Cheers Stefan iphone objective c ios singleton grand central dispatch share improve this question Keep it simple id sharedInstance static dispatch_once_t pred static MyClass sharedInstance..
iOS background application network access http://stackoverflow.com/questions/9613357/ios-background-application-network-access accessory that needs to deliver updates on a regular schedule through the External Accessory framework. bluetooth central ”The app works with a Bluetooth accessory that needs to deliver updates on a regular schedule through the CoreBluetooth framework...
NSURLRequest : Post data and read the posted page http://stackoverflow.com/questions/10300353/nsurlrequest-post-data-and-read-the-posted-page Assume lowercase if responeString isEqualToString @ true Deal with true return Deal with an error Method 2 Grand Central Dispatch async function .m IBAction dispatchButtonPushed id sender NSURL url NSURL URLWithString @ http www.apple.com NSDictionary..
Common multithreading mistakes beginners make on iPhone http://stackoverflow.com/questions/1357108/common-multithreading-mistakes-beginners-make-on-iphone highly recommend reading the new Concurrency Programming Guide however ignore the blocks and dispatch queues as Grand Central Dispatch is not yet available on iPhone OS iOS 4.0 just added blocks and GCD because it makes a strong case for using structures..
NSThread vs. NSOperationQueue vs. ??? on the iPhone http://stackoverflow.com/questions/3041837/nsthread-vs-nsoperationqueue-vs-on-the-iphone most the work is already done for you. NSOperationQueue is free to switch to a smarter implementation like Grand Central Dispatch now or in the future. NSThread is more likely to always be just an operating system thread. Bonus NSOperationQueue..
iphone ios running in separate thread http://stackoverflow.com/questions/3869217/iphone-ios-running-in-separate-thread ios thread safety share improve this question In my opinion the best way is with libdispatch aka Grand Central Dispatch GCD . It limits you to iOS 4 and greater but it's just so simple and easy to use. The code to do some processing..
Do you need to create an NSAutoreleasePool within a block in GCD? http://stackoverflow.com/questions/4141123/do-you-need-to-create-an-nsautoreleasepool-within-a-block-in-gcd thread or operation because none exists by default. Does the same rule apply to a block that is placed within a Grand Central Dispatch queue and will be run on a non main thread That is do you need to create an NSAutoreleasePool within each block.. central dispatch share improve this question Does the same rule apply to a block that is placed within a Grand Central Dispatch queue and will be run on a non main thread That is do you need to create an NSAutoreleasePool within each block..
Grand Central Dispatch (GCD) with CoreData http://stackoverflow.com/questions/4264540/grand-central-dispatch-gcd-with-coredata Central Dispatch GCD with CoreData I'm using Grand Central Dispatch GCD in my application to do some heavy lifting. The application.. Central Dispatch GCD with CoreData I'm using Grand Central Dispatch GCD in my application to do some heavy lifting. The application is using Core Data for data storage purposes. Here's..
NSURLConnection and grand central dispatch http://stackoverflow.com/questions/5037545/nsurlconnection-and-grand-central-dispatch network programming and recommended to use asynchronous network programming with RunLoop. Use background thread Grand Central Dispatch Concurrent Queue for thread safe data processing not for network programming. By the way Blocks and Grand Central.. Dispatch Concurrent Queue for thread safe data processing not for network programming. By the way Blocks and Grand Central Dispatch sessions are also worth to see. WWDC 2010 Session 206 Introducing Blocks and Grand Central Dispatch on iPhone WWDC.. Blocks and Grand Central Dispatch sessions are also worth to see. WWDC 2010 Session 206 Introducing Blocks and Grand Central Dispatch on iPhone WWDC 2010 Session 211 Simplifying iPhone App Development with Grand Central Dispatch I wrote a wrapper..
How to make ui responsive all the time and do background updating? http://stackoverflow.com/questions/5133731/how-to-make-ui-responsive-all-the-time-and-do-background-updating of the grid of thumbnails. TIA Praveen S iphone objective c cocoa asynchronous share improve this question Grand Central Dispatch is easy to use for background loading. But GCD is only for after iOS4. If you have to support iOS3 performSelectorInBackground..
Grand Central Dispatch (GCD) vs. performSelector - need a better explanation http://stackoverflow.com/questions/5225130/grand-central-dispatch-gcd-vs-performselector-need-a-better-explanation Central Dispatch GCD vs. performSelector need a better explanation I've used both GCD and performSelectorOnMainThread waitUntilDone..
CADisplayLink OpenGL rendering breaks UIScrollView behaviour http://stackoverflow.com/questions/5944050/cadisplaylink-opengl-rendering-breaks-uiscrollview-behaviour One way around this is to perform your OpenGL ES rendering actions on a background thread by using a Grand Central Dispatch serial queue. I did this in my recent update to Molecules source code for which can be found at that link and in..
Core Data and threads / Grand Central Dispatch http://stackoverflow.com/questions/7540801/core-data-and-threads-grand-central-dispatch Data and threads Grand Central Dispatch I'm a beginner with Grand Central Dispatch GCD and Core Data and I need your help to use Core Data with CGD so.. Data and threads Grand Central Dispatch I'm a beginner with Grand Central Dispatch GCD and Core Data and I need your help to use Core Data with CGD so that the UI is not locked while I add 40.000..
Last In-First Out Stack with GCD? http://stackoverflow.com/questions/7567827/last-in-first-out-stack-with-gcd to be updated and then the others that are currently off screen would be updated. Is such a thing possible with Grand Central Dispatch Or not too onerous to implement some other way Note by the way that I am using Core Data with a SQLite store and.. contact.image theCell setNeedsLayout return cell The WWDC2010 conference video Introducing Blocks and Grand Central Dispatch shows an example using the nested dispatch_async as well. another potential optimization could be to start downloading..
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 Christmas to create my object It doesn't return immediately right At least that seems to be the whole point of Grand Central Dispatch. So why are they doing this iphone objective c ios singleton automatic ref counting share improve this question..
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