2014/10/15 下午 10:05:31

iphone Programming Glossary: contexts

How to use OpenGL ES on a separate thread on iphone?

http://stackoverflow.com/questions/1253145/how-to-use-opengl-es-on-a-separate-thread-on-iphone

es share improve this question You need to create an EAGLSharegroup . Check out this thread on sharing OpenGL contexts between threads. UPDATE Previous to iOS5 I shared OpenGL contexts between threads to allow asynchronous loading of textures.. . Check out this thread on sharing OpenGL contexts between threads. UPDATE Previous to iOS5 I shared OpenGL contexts between threads to allow asynchronous loading of textures from disk. But iOS5's CVOpenGLESTextureCaches essentially make..

Get to UIViewController from UIView on iPhone?

http://stackoverflow.com/questions/1340434/get-to-uiviewcontroller-from-uiview-on-iphone

controller directly. The view should instead be independent of the view controller and be able to work in different contexts. Should you need the view to interface in a way with the view controller the recommended way and what Apple does across..

Can I encode a subclass of NSManagedObject?

http://stackoverflow.com/questions/1371749/can-i-encode-a-subclass-of-nsmanagedobject

bother trying to do the NSCoding dances required to directly serialize and deserialize an NSManagedObject between two contexts you can do this see below . Instead I would create a dictionary with the appropriate attribute key values you can get the..

Rounded UIView using CALayers - only some corners - How?

http://stackoverflow.com/questions/2264083/rounded-uiview-using-calayers-only-some-corners-how

myView super viewDidLoad MyView is just a UIImageView subclass @interface MyView UIImageView I'd never used graphics contexts before but I managed to hobble together this code. It's missing the code for two of the corners. If you read the code you..

How to Deal with Temporary NSManagedObject instances?

http://stackoverflow.com/questions/3256195/how-to-deal-with-temporary-nsmanagedobject-instances

objects don't get to the data which I fetch from the common to both stores context Or do I have to create separate contexts for such a task UPD Now I'm thinking about making separate context for in memory store. How do I move objects from one context..

Cocoa Touch - Comparing Images

http://stackoverflow.com/questions/3400707/cocoa-touch-comparing-images

two UIImages you should get their CGImageRef quartz representations from those objects. Then create two new bitmap contexts backed by a memory buffer that you create and pass in one for each of the images. Then use CGContextDrawImage to draw the.. that you create and pass in one for each of the images. Then use CGContextDrawImage to draw the images into the bitmap contexts. Now the bytes of the images are in the buffers. You can then loop through manually or memcmp to check for differences... manually or memcmp to check for differences. Apple's own detailed explanation and sample code around creating bitmap contexts and drawing into them is here http developer.apple.com iphone library documentation GraphicsImaging Conceptual drawingwithquartz2d..

Fast and Lean PDF Viewer for iPhone / iPad / iOs - tips and hints?

http://stackoverflow.com/questions/3889634/fast-and-lean-pdf-viewer-for-iphone-ipad-ios-tips-and-hints

into a singleton. Cancel needless NSOperations When you can especially if they will be using memory beware of leaving contexts open though Recycle page objects by doing pointer swaps or destroy unused views Close any open Contexts as soon as you don't..

NSMutableString as retain/copy

http://stackoverflow.com/questions/4995254/nsmutablestring-as-retain-copy

objects. tightly coupled objects are those which are basically co dependent and not generally reusable in other contexts. that concept's fine you may just be using a private class for several reasons. in either case copy write semantics to external..

Building openears compatible language model

http://stackoverflow.com/questions/5220661/building-openears-compatible-language-model

that you don't need one enormous model but can get by with multiple smaller ones that you can switch in in different contexts or to use a network based API that can do large vocabulary recognition on a server or make your own API that uses Sphinx4..

Recreate recipient bubble behaviour in Mail.app / Three20

http://stackoverflow.com/questions/5247072/recreate-recipient-bubble-behaviour-in-mail-app-three20

Can you use cancel/isCancelled with GCD/dispatch_async?

http://stackoverflow.com/questions/5449469/can-you-use-cancel-iscancelled-with-gcd-dispatch-async

^ ... void actuallyProcedurallyBuildInBackground we are actually in the BG here... self setUpHere set up any variables contexts etc you need right here DO NOT open any variables contexts etc in buildGuts when you return back here after buildGuts CLEAN.. in the BG here... self setUpHere set up any variables contexts etc you need right here DO NOT open any variables contexts etc in buildGuts when you return back here after buildGuts CLEAN UP those variables contexts etc at this level. using this.. DO NOT open any variables contexts etc in buildGuts when you return back here after buildGuts CLEAN UP those variables contexts etc at this level. using this system you can nest as deep as you want and the one CHECKER pseudocall will always take you..

Core Data and threads / Grand Central Dispatch

http://stackoverflow.com/questions/7540801/core-data-and-threads-grand-central-dispatch

to Core Data. I know that CD is not thread safe so I have to use another context and then save the data and merge contexts as far as I was able to understand from some articles. What I couldn't do yet is put the pieces together. So in my code..