2014/10/15 下午 10:12:28

iphone Programming Glossary: parallel

iPhone iOS5 CLGeocoder how to geocode a large (200) set of addresses?

http://stackoverflow.com/questions/10619879/iphone-ios5-clgeocoder-how-to-geocode-a-large-200-set-of-addresses

now I'm trying to get coordinates for these addresses using CLGeocoder . My current approach is to create geocoders in parallel and let them do their magic. I noticed that each one of them seems to take a separate thread. so I saw up to 100 threads..

Maximum speed from IOS/iPad/iPhone

http://stackoverflow.com/questions/11219240/maximum-speed-from-ios-ipad-iphone

use Apple's Accelerate framework. It is designed to use the floating point hardware to do calculations on vectors in parallel. I will also address your points one by one 1 This is not because of the CPU it is because as of the armv7 era only 32 bit.. is to use Apple's framework that I mentioned above. It provides sin and cos functions that calculate 4 values in parallel. The algorithms are fine tuned in assembly and NEON so they give the maximum performance while using minimal battery. 4..

What is the basic difference between NSTimer, NSTask, NSThread and NSRunloop?

http://stackoverflow.com/questions/1124207/what-is-the-basic-difference-between-nstimer-nstask-nsthread-and-nsrunloop

runs in at least one thread . You can think of each thread as a separate process of program execution each running parallel to the others. If you have some kind of user interface or other code that needs to listen to events like network ports you..

iPhone app without using Interface Builder

http://stackoverflow.com/questions/2472691/iphone-app-without-using-interface-builder

you'll need to manipulate interfaces programmatically such as for custom views and animations. This code can exist in parallel with Interface Builder without too much confusion. Again it's more of a matter of personal preference at this point but..

Detecting Acceleration in a car (iPhone Accelerometer)

http://stackoverflow.com/questions/2733249/detecting-acceleration-in-a-car-iphone-accelerometer

the same value. But you can't compare gravity in two different locations without a means to carry out what's called parallel transport . This is what a gyro does. Forget the 250 but I think you should give me a beer for the amount of R D time I'm..

iPhone Simulator 3.x not listed after upgrading to XCode 3.2.3 Beta4 with OS 4.0

http://stackoverflow.com/questions/2932129/iphone-simulator-3-x-not-listed-after-upgrading-to-xcode-3-2-3-beta4-with-os-4-0

device dedicated exclusively to iPhone OS 4 beta application development. I would recommend you install the 3.x sdk in parallel to the 4.0. I keep the two Developer directories on my machine Developer for maintaining apps written for 3.0 and 3.1 and..

iPhone — is initWithCoder an exception to the usual designated initializer design pattern?

http://stackoverflow.com/questions/2944823/iphone-is-initwithcoder-an-exception-to-the-usual-designated-initializer-desi

return self That's the simplest case. If super itself supports NSCoding then you usually just end up writing a parallel designated initializer like so id initWithCoder NSCoder decoder if self super initWithCoder decoder id someDecodedValue.. self.anotherRequiredProperty someOtherDecodedValue return self I think in most cases initWithCoder ends up being a parallel designated initializer because it takes care of all initialization just like the designated initializer should. It doesn't..

Are either the IPad or IPhone capable of OpenCL?

http://stackoverflow.com/questions/3258257/are-either-the-ipad-or-iphone-capable-of-opencl

ES 2.0. 2.0 lets you create your own programmable shaders to run on the GPU which would let you do high performance parallel calculations. While not as elegant as OpenCL you might be able to solve many of the same problems. Additionally iOS 4.0..

Not safe to lookup objc runtime data

http://stackoverflow.com/questions/3293523/not-safe-to-lookup-objc-runtime-data

PowerVR SGX535 Shader Performance (OpenGL ES 2.0)

http://stackoverflow.com/questions/3320661/powervr-sgx535-shader-performance-opengl-es-2-0

instructions are generated from GLSL instructions what are the timings of the PowerVR instructions what sort of parallel processing units are in the PowerVR535 and how can they be exploited Thanks Tristan iphone ipad opengl es glsl share..

iOS App Architecture with NSOperations

http://stackoverflow.com/questions/3856598/ios-app-architecture-with-nsoperations

parsing and mapping of the results handling CoreData and so on. Given my application there are scenarios when a lot of parallel tasks are running worst case e.g. the user currently changes his her profile picture while the application sends the users..

Quartz 2D/OpenGLES geometric distortions on images (preferrably using CGImage)

http://stackoverflow.com/questions/459108/quartz-2d-opengles-geometric-distortions-on-images-preferrably-using-cgimage

this bitmap data as a transformation on my CGImage. This isn't an affine transformation since lines are no longer parallel around the area of distortion etc. Is it possible using CGImage or would I need to do this using OpenGLES Thanks iphone..

Choose OpenGL ES 1.1 or OpenGL ES 2.0?

http://stackoverflow.com/questions/4784137/choose-opengl-es-1-1-or-opengl-es-2-0

shading and ambient occlusion lighting as well as letting you do something interesting like offloading massively parallel work to the GPU. If you care to see some examples of what you can do with OpenGL ES 2.0 video for the class I taught on..

Concurrency and serial queues in Grand Central Dispatch

http://stackoverflow.com/questions/5026043/concurrency-and-serial-queues-in-grand-central-dispatch

async. So it will be done concurrently right How can that be if myQueue is serial How can a serial queue do things in parallel or if you will out of order thanks iphone objective c ios grand central dispatch share improve this question dispatch_async..

iOS: Movement Precision in 3D Space

http://stackoverflow.com/questions/5550453/ios-movement-precision-in-3d-space

would enable this degree of accuracy For example the user holds the phone flat so that the bottom of the phone runs parallel with the floor . There is something drawn on screen which doesn't move with the screen as the person walks forward backward..

Two views Multiple UIPickerViews Single outlet

http://stackoverflow.com/questions/6704357/two-views-multiple-uipickerviews-single-outlet

self.landscapePickerView else return self.portraitPickerView However if you have more than one or two subviews having parallel properties like this cluttering your controller could get to be a pain. In that case I'd consider making a custom subclass..

Reading a plist into core data - NSDictionary within NSDictionary

http://stackoverflow.com/questions/6738826/reading-a-plist-into-core-data-nsdictionary-within-nsdictionary

in core data. I deleted most of the things I've tried and failed with so far. Here's my last attempt the obvious and parallel gardenManObj setValue thisGardenDictionary objectForKey @ plants forKey @ plants did not work xCode compiler objected to..

Getting info about bad memory address in LLDB

http://stackoverflow.com/questions/9853100/getting-info-about-bad-memory-address-in-lldb

xxx . Before I would have just used gdb info malloc history xxx to start debugging but I am having trouble finding a parallel command in LLDB . I saw this thread that said to use Instruments but when I do I still get the crash but I can't figure..