2014/10/15 下午 10:10:34

iphone Programming Glossary: invalidate

Getting user location every n minutes after app goes to background

http://stackoverflow.com/questions/10235203/getting-user-location-every-n-minutes-after-app-goes-to-background

sharedApplication double remaining app.backgroundTimeRemaining if remaining 580.0 remaining 570.0 self.timer invalidate self.timer nil self.locationManager startUpdatingLocation self.locationManager stopUpdatingLocation DbgLog @ Checking for..

NSTimer doesn't stop

http://stackoverflow.com/questions/1031554/nstimer-doesnt-stop

doesn't stop I've got a timer which fires when the viewWillAppear method is being called and invalidates when the viewDidDisappear method is being called. But after a certain amount of switching between views the timer continues.. is being called. But after a certain amount of switching between views the timer continues firing even after it was invalidated. What's the problem Here is my code NSTimer timer void viewWillAppear BOOL animated super viewWillAppear animated timer.. timerAction userInfo nil repeats YES void viewDidDisappear BOOL animated super viewDidDisappear animated timer invalidate timer nil void timerAction NSLog @ timerAction iphone cocoa touch timer share improve this question I should have..

Detect when home button is pressed iOS

http://stackoverflow.com/questions/10324596/detect-when-home-button-is-pressed-ios

applicationDidEnterBackground UIApplication application Use this method to release shared resources save user data invalidate timers and store enough application state information to restore your application to its current state in case it is terminated..

UIStringDrawing methods don't seem to be thread safe in iOS 6

http://stackoverflow.com/questions/12744558/uistringdrawing-methods-dont-seem-to-be-thread-safe-in-ios-6

36 Thread 7 name Dispatch queue com.myApp.SerialDrawQueue Thread 7 0 WebCore 0x35a21410 WebCore FontFallbackList invalidate WTF PassRefPtr WebCore FontSelector 156 1 WebCore 0x35a2124e WebCore Font Font WebCore FontPlatformData const WTF PassRefPtr..

Tricks for improving iPhone UITableView scrolling performance?

http://stackoverflow.com/questions/1352479/tricks-for-improving-iphone-uitableview-scrolling-performance

the table view can request this frequently Create a least recently used cache for the images used in the table and invalidate all the inactive entries when you receive a memory warning Draw everything in the UITableViewCell 's drawRect if possible..

iPhone: Detecting user inactivity/idle time since last screen touch

http://stackoverflow.com/questions/273450/iphone-detecting-user-inactivity-idle-time-since-last-screen-touch

if phase UITouchPhaseBegan phase UITouchPhaseEnded self resetIdleTimer void resetIdleTimer if idleTimer idleTimer invalidate idleTimer release idleTimer NSTimer scheduledTimerWithTimeInterval maxIdleTime target self selector @selector idleTimerExceeded..

How can I programmatically pause an NSTimer?

http://stackoverflow.com/questions/347219/how-can-i-programmatically-pause-an-nstimer

to pause i.e. something like this myNSTimer pause I'm using this syntax because I've been doing things like myNSTimer invalidate when I want it to stop. How can I programmatically pause the NSTimer iphone objective c cocoa touch share improve this..

applicationWillEnterForeground vs. applicationDidBecomeActive, applicationWillResignActive vs. applicationDidEnterBackground

http://stackoverflow.com/questions/3712979/applicationwillenterforeground-vs-applicationdidbecomeactive-applicationwillre

is called after applicationWillResignActive docs say you should release shared resources save user data invalidate timers save app state so you can restore it if app is terminated. disable UI updates you have 5 seconds to do what you need..

UITableView scroll smooth with certain speed?

http://stackoverflow.com/questions/3979119/uitableview-scroll-smooth-with-certain-speed

50 stands for the amount of movement every tick the timer will make void stopscroll stop tabletimer again tableTimer invalidate BOOL shouldAutorotateToInterfaceOrientation UIInterfaceOrientation toInterfaceOrientation return YES @end If you have any..

UIWebView - Enabling Action Sheets on <img> tags

http://stackoverflow.com/questions/5163831/uiwebview-enabling-action-sheets-on-img-tags

phase case UITouchPhaseBegan A finger touched the screen tapLocation touch locationInView self contextualMenuTimer invalidate contextualMenuTimer NSTimer scheduledTimerWithTimeInterval 0.8 target self selector @selector tapAndHoldAction userInfo.. nil repeats NO break case UITouchPhaseEnded case UITouchPhaseMoved case UITouchPhaseCancelled contextualMenuTimer invalidate contextualMenuTimer nil break else Multiple fingers are touching the screen contextualMenuTimer invalidate contextualMenuTimer.. invalidate contextualMenuTimer nil break else Multiple fingers are touching the screen contextualMenuTimer invalidate contextualMenuTimer nil touches release The notification is then handled like this in viewDidLoad NSNotificationCenter defaultCenter..

Lock Unlock events iphone

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

accelerometer didAccelerate UIAcceleration acceleration NSLog @ STATUS Update from accelerometer _notActiveTimer invalidate _notActiveTimer NSTimer scheduledTimerWithTimeInterval 2 target self selector @selector deviceDidLock userInfo nil repeats.. NSLog @ STATUS Application did become active UIAccelerometer sharedAccelerometer setDelegate nil _notActiveTimer invalidate _notActiveTimer nil I know... It's kind of a hack but it has worked like a charm for me so far. Please update if you see..

Objective-C NSMutableArray mutated while being enumerated?

http://stackoverflow.com/questions/8834031/objective-c-nsmutablearray-mutated-while-being-enumerated

Now when i press a certain button i need to remove all objects in the array or at least some . So i tried to first invalidate all the 4 timers and then do the work i want with the array and then fire up the timers. I thought this would've worked..

Way to make a UIButton continuously fire during a press-and-hold situation?

http://stackoverflow.com/questions/903114/way-to-make-a-uibutton-continuously-fire-during-a-press-and-hold-situation

movePlayer userInfo nil repeats YES void touchesEnded NSSet touches withEvent UIEvent event if timer nil timer invalidate timer nil void touchesMoved NSSet touches withEvent UIEvent event if timer nil timer invalidate timer nil This way you.. if timer nil timer invalidate timer nil void touchesMoved NSSet touches withEvent UIEvent event if timer nil timer invalidate timer nil This way you can repeat the event at a predefined interval and not have to rely on a button and get the repeat..

How to manage Enterprise Distribution certificate expiration?

http://stackoverflow.com/questions/9216485/how-to-manage-enterprise-distribution-certificate-expiration

a revocation is received at that time the app will be prevented from running. Revoking a distribution certificate will invalidate all of the applications you have distributed. An app will not run if the distribution certificate has expired. Currently..

What is a better way to create a game loop on the iPhone other than using NSTimer?

http://stackoverflow.com/questions/96265/what-is-a-better-way-to-create-a-game-loop-on-the-iphone-other-than-using-nstime

1.0f 60 target self selector @selector renderFrame userInfo nil repeats YES #endif void stopLoop timer invalidate running NO In the renderFrame method You prepare the framebuffer draw frame and present the framebuffer on screen. P.S...