2014/10/15 下午 10:11:10

iphone Programming Glossary: locking

Optimized Image Loading in a UIScrollView

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

main thread. Secondly I'd be looking for details surrounding the NSOperation setup and execution that might be causing locking and syncing issues which could interrupt the main thread and therefore impact scrolling. A few items to consider Try loading.. operates in its own thread s make sure that none of your code executing within the NSOperation is syncing or locking to the main thread. This would eliminate all of the advantages of using the NSOperationQueue. Make sure your unload operation..

Common multithreading mistakes beginners make on iPhone

http://stackoverflow.com/questions/1357108/common-multithreading-mistakes-beginners-make-on-iphone

as pointed out by Colin Wheeler so you might want to use NSLock to protect access to your shared resources. However locking of any sort can be expensive which is why I've been migrating my applications over to using single wide NSOperationQueues..

CGImage/UIImage lazily loading on UI thread causes stutter

http://stackoverflow.com/questions/1815476/cgimage-uiimage-lazily-loading-on-ui-thread-causes-stutter

works almost fine except there is a stutter as each image becomes visible. At first I thought my background worker was locking something in the UI thread. I spent a lot of time looking at it and eventually realized that the UIImage is doing some extra..

Allow horizontal scrolling only in the core-plot barchart?

http://stackoverflow.com/questions/1892544/allow-horizontal-scrolling-only-in-the-core-plot-barchart

any direction you can set the allowsUserInteraction property of the plot space to YES. We currently have no means of locking that movement to one direction. The scrolling action takes place in the pointingDeviceDraggedAtPoint method on CPXYPlotSpace..

What happens to an iPhone app when iPhone goes into stand-by mode?

http://stackoverflow.com/questions/411436/what-happens-to-an-iphone-app-when-iphone-goes-into-stand-by-mode

property which can be turned on to prevent the screen from turning off while the app is running is about locking the screen after user inactivity. It's not directly related to system sleep it's indirectly related in that the system may..

Temporarily Lock or Disable iphone home button

http://stackoverflow.com/questions/4190169/temporarily-lock-or-disable-iphone-home-button

and the home button to be disabled. I tried googling but haven't been able to find a solution. Temporary or timed locking Lock for 5 10 mins. would also do. The app. should work on non jailbroken phones hence going around apple won't work. Appreciate..

iPhone GPS Development - Tips + Tricks [closed]

http://stackoverflow.com/questions/488088/iphone-gps-development-tips-tricks

could avoid this in your application by listening for UIApplicationWillResignActiveNotification to detect the screen locking and UIApplicationDidBecomeActiveNotification to detect unlock. Higher precision results will take more time to acquire because..

NSMutableString as retain/copy

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

not use the default synthesized implementation. instead you should write your own void setStr1 NSMutableString arg locking observing undo etc omitted NSMutableString copy arg mutableCopy NSMutableString prev str1 str1 copy prev release NSMutableString.. etc omitted NSMutableString copy arg mutableCopy NSMutableString prev str1 str1 copy prev release NSMutableString str1 locking observing etc omitted don't return something the clients thinks they may possibly modify and don't return something you.. copy NSString str1 @end @implementation MONThing no need for clients to create a mutableCopy void setStr1 NSString arg locking observing undo etc omitted NSMutableString copy arg mutableCopy NSMutableString prev str1 str1 copy prev release the result..

Turning an iPhone or iPod into a wireless webcam

http://stackoverflow.com/questions/5258696/turning-an-iphone-or-ipod-into-a-wireless-webcam

four problems Get the camera feed. Convert encode this to the right format. Stream the data. Prevent the phone from locking itself and going into deep sleep. The first one is fairly simple and Apple has as always provided good documentation and..

Locking the Fields in MFMailComposeViewController

http://stackoverflow.com/questions/6284599/locking-the-fields-in-mfmailcomposeviewcontroller

its not a massive problem if the fields can't be locked but any help would be greatly appreciated. iphone ios email locking mfmailcomposeviewcontroll share improve this question Download the framework from the link below. Then I have put together..

NSNumber vs Int

http://stackoverflow.com/questions/6662730/nsnumber-vs-int

and fast pathed cfnumber integers in . Where this can be used it saves you from slow operations like allocations locking and ref count ops. Nevertheless tagged pointers are incapable of representing every number and it introduces overhead so..

How do I use NSConditionLock? Or NSCondition

http://stackoverflow.com/questions/6704072/how-do-i-use-nsconditionlock-or-nscondition

could show me a decent tutorial or example to explain NSConditionLock or possibly suggest a better method. iphone ios locking condition share improve this question EDIT as @Bonshington commented this answer refers to NSCondition as opposed to..

Lock Unlock events iphone

http://stackoverflow.com/questions/706344/lock-unlock-events-iphone

By lock events I mean showing or hiding the Lock Screen which might need a password to unlock or not . iphone ios api locking share improve this question Round about answer Application will resign active gets called in all sorts of scenarios.....

How do I enable directional lock for a UIScrollView?

http://stackoverflow.com/questions/861986/how-do-i-enable-directional-lock-for-a-uiscrollview

a UIView inside. I want to lock the x axis so that the view is only scrolled vertically. How do I enable directional locking iphone uiscrollview share improve this question First set the UIScrollView's contentSize to have a width that is equal..

UINavigationController Force Rotate

http://stackoverflow.com/questions/9826920/uinavigationcontroller-force-rotate

it is shown in portrait. The user can then rotate their phone and it displays in landscape as I want it to locking to landscape . The user then progresses onwards to a portrait UIViewController and the same happens it start in landscape.. in landscape then they rotate their phone and it becomes portrait again and locks to portrait . It seems orientation locking is allowed between UIViewControllers however auto rotation programmatically changing the orientation is somehow blocked...