2014/10/15 下午 10:12:55

iphone Programming Glossary: priority

Optimized Image Loading in a UIScrollView

http://stackoverflow.com/questions/1098234/optimized-image-loading-in-a-uiscrollview

This would eliminate all of the advantages of using the NSOperationQueue. Make sure your unload operation has a lower priority than your load operation since the priority is the user experience first memory conservation second. Make sure you keep.. of using the NSOperationQueue. Make sure your unload operation has a lower priority than your load operation since the priority is the user experience first memory conservation second. Make sure you keep enough thumbnails for at least a page or two..

Background threads consuming 100% CPU on iPhone 3GS causes latent main thread

http://stackoverflow.com/questions/1940903/background-threads-consuming-100-cpu-on-iphone-3gs-causes-latent-main-thread

MyApp 33.8 DTMobileIS 12.2 ... While the user interacts with the screen or the table is scrolling the main thread's priority becomes 1.0 the highest possible and its run loop mode becomes UIEventTrackingMode. Each of the operation's threads are.. 1.0 the highest possible and its run loop mode becomes UIEventTrackingMode. Each of the operation's threads are 0.5 priority by default and the asynchronous connections run in the NSDefaultRunLoopMode. Due to my limited understanding of how threads..

Keyboard Animation Issues When Calling becomeFirstResponder within a Modal View Controller

http://stackoverflow.com/questions/2512502/keyboard-animation-issues-when-calling-becomefirstresponder-within-a-modal-view

most likely the run time of the keyboard transition animation. I am fairly certain the the keyboard animation seizes priority from other animations so that it can drive the rearrangement of the UI e.g. scrolling a table so that the keyboard does..

Can't add a corner radius and a shadow

http://stackoverflow.com/questions/3316424/cant-add-a-corner-radius-and-a-shadow

to achieve the effect of displaying both a corner radius and a shadow at the same time. If performance is your priority though use a path. UPDATE 2 Since people seem to be having trouble getting this to work in some instances I'll post a more..

Using iAd as default ad network, and AdMob if iAd fails

http://stackoverflow.com/questions/3632032/using-iad-as-default-ad-network-and-admob-if-iad-fails

improve this question Why not use Adwhirl. Its great sdk that enables you to do exactly what you need. You can set priority settings for different ad networks which can be changed on the fly if you find one network performing better than others.. network performing better than others etc. It handles all the logic for which ad to show based on request failure or priority without you needing to worry about it. All you do is create an adwhirl view and request an ad. Adwhirl does the rest including..

What's the best way to handle longtap and double-tap events on mobile devices using jQuery?

http://stackoverflow.com/questions/5507638/whats-the-best-way-to-handle-longtap-and-double-tap-events-on-mobile-devices-us

It has been reported to jQuery as a bug but as doubletapping isn't the same as doubleclicking it does not have a high priority. However mastermind Raul Sanchez coded a jquery solution for doubletap which you can probably use Here's the link works..

UIScrollView pauses NSTimer until scrolling finishes

http://stackoverflow.com/questions/605027/uiscrollview-pauses-nstimer-until-scrolling-finishes

all the NSTimers that are running get paused until the scroll is finished. Is there a way to get around this Threads A priority setting Anything iphone uiscrollview nstimer share improve this question You have to run another thread and another..

Unhiding a view is very slow in CTCallCenter callEventHandler

http://stackoverflow.com/questions/6274642/unhiding-a-view-is-very-slow-in-ctcallcenter-calleventhandler

NSDefaultRunLoopMode vs NSRunLoopCommonModes

http://stackoverflow.com/questions/7222449/nsdefaultrunloopmode-vs-nsrunloopcommonmodes

terminates and the run loop set to default mode again obviously this is a choice made by the OS architects to give priority to user events instead of background events. If you decide to change the run loop mode for your NSURLConnection thread by..

Last In-First Out Stack with GCD?

http://stackoverflow.com/questions/7567827/last-in-first-out-stack-with-gcd

the nested dispatch_async as well. another potential optimization could be to start downloading the images on a low priority background queue when the app launches. i.e. in the ApplicationDidFinishLaunchingWithOptions method dispatch in on the main.. comes online . A trick mentioned by Apple at WWDC dispatch_async dispatch_get_main_queue ^ dispatch to background priority queue as soon as we get onto the main queue so as not to block the main queue and therefore the UI dispatch_queue_t lowPriorityQueue.. objectAtIndex idx setImage renderedImage With this nested dispatch we are rendering the images on an extremely low priority queue. Putting the image rendering on the background priority queue will allow the images being rendered from the cellForRowAtIndexPath..

What's the difference between the “global queue” and the “main queue” in GCD?

http://stackoverflow.com/questions/9602042/whats-the-difference-between-the-global-queue-and-the-main-queue-in-gcd

blocks as soon as threads become available non FIFO completion order . The global concurrent queues represent three priority bands DISPATCH_QUEUE_PRIORITY_HIGH DISPATCH_QUEUE_PRIORITY_DEFAULT DISPATCH_QUEUE_PRIORITY_LOW Blocks submitted to the high.. DISPATCH_QUEUE_PRIORITY_HIGH DISPATCH_QUEUE_PRIORITY_DEFAULT DISPATCH_QUEUE_PRIORITY_LOW Blocks submitted to the high priority global queue will be invoked before those submitted to the default or low priority global queues. Blocks submitted to the.. Blocks submitted to the high priority global queue will be invoked before those submitted to the default or low priority global queues. Blocks submitted to the low priority global queue will only be invoked if no blocks are pending on the default..