2014/10/15 下午 10:11:15

iphone Programming Glossary: maintains

what is the first step in (NSTimer release and invalidate)?

http://stackoverflow.com/questions/1171393/what-is-the-first-step-in-nstimer-release-and-invalidate

question timer release only needs to be called if you own the timer. From Apple's documentation Because the run loop maintains the timer from the perspective of memory management there's typically no need to keep a reference to a timer once you 脎e..

How do I add photos to the iPhone Simulator for OSX? [duplicate]

http://stackoverflow.com/questions/1250199/how-do-i-add-photos-to-the-iphone-simulator-for-osx

iPhone simulator. Edit First just look at following image. In iPhone simulator 4.0 iphone iphone simulator itself it maintains a sqlite database for added images. So if you want copy paste system first make insert entries then copy paste. That would..

IPhone creating a chat application [closed]

http://stackoverflow.com/questions/1375645/iphone-creating-a-chat-application

SDK has push support built in. Basically all messages that need to be pushed from all apps go to Apple's server which maintains a persistent connection to the user's iphone. The upside is that you dont have to worry about it and your app can get updates..

Saving and restoring CGContext

http://stackoverflow.com/questions/1446446/saving-and-restoring-cgcontext

It does not store drawing elements like paths. From the documentation on CGContextSaveGState Each graphics context maintains a stack of graphics states. Note that not all aspects of the current drawing environment are elements of the graphics state...

Animating a shape with CoreAnimation

http://stackoverflow.com/questions/1767401/animating-a-shape-with-coreanimation

Leopard the new CAShapeLayer class should let you do this kind of animation pretty easily. If you have a path that maintains the same number of control points like in your case you can set that path to the CAShapeLayer then animate the path property..

iPhone - What are reuseIdentifiers (UITableViewCell)?

http://stackoverflow.com/questions/2152180/iphone-what-are-reuseidentifiers-uitableviewcell

is assigned to the cell object in initWithFrame reuseIdentifier and cannot be changed thereafter. A UITableView object maintains a queue or list of the currently reusable cells each with its own reuse identifier and makes them available to the delegate..

How does undo/redo basically work on iPhone OS?

http://stackoverflow.com/questions/2449268/how-does-undo-redo-basically-work-on-iphone-os

OS 3.0 brought over the concept of NSUndoManager from the Mac which is what enables undo on the iPhone. NSUndoManager maintains a stack of NSInvocations which are the opposite actions to any edits or other changes you make. For example void observeValueForKeyPath..

Practical efficient usage of IBOutletColletion

http://stackoverflow.com/questions/3635638/practical-efficient-usage-of-iboutletcolletion

IBOutletCollection Unfortunately Apple documentation mentions it briefly without giving an wider idea of usage. OK it maintains one to many relation with IB but how to access and use particular objects efficiently With TagName How to ensure the order..

Out-Of-Memory while doing Core Data migration

http://stackoverflow.com/questions/4479229/out-of-memory-while-doing-core-data-migration

You might have to add a step where you assign some sort of unique ID to each object because I'm not sure if Core Data maintains object IDs when it does a non lightweight migration. If you need to do this your version 2 model would add a new attribute..

Mysterious “progressive slowing” problem in run loop / drawRect

http://stackoverflow.com/questions/4786754/mysterious-progressive-slowing-problem-in-run-loop-drawrect

are appended to the context. When this happens the CGLayer is rendered again. The slowdown is cause because the code maintains a single CGLayer offscreenPrefabCGL that has its context modified in every iteration of the loop in paintActualGutsOfHugeImage.. proposed by @v01d. Flatten the layer. Instead of holding a single CGLayer copy the CGLayer on each iteration. This maintains a flat image in the Layer that is very fast to render. I Implemented 2 with good results. The first 100 flowers are faster..

another question about recording, modifying and playing audio on iphone

http://stackoverflow.com/questions/5137853/another-question-about-recording-modifying-and-playing-audio-on-iphone

This example shows a rms calculation as a running average. The circular buffer maintains a history of squares and eliminates the need to sum the squares every operation. I haven't run it so treat it as pseudo..

Cocos2d - Setting Device/Screen Orientation

http://stackoverflow.com/questions/5792706/cocos2d-setting-device-screen-orientation

to LandscapeRight and keep it that way throughout the entire game. How do I change my orientation so that it maintains LandscapeRight Any help is appreciated. Thank you iphone cocos2d iphone share improve this question Modify GameConfig.h..

Can you access application delegate from within a UITableViewDataSource function?

http://stackoverflow.com/questions/817259/can-you-access-application-delegate-from-within-a-uitableviewdatasource-function

functions iphone objective c cocoa touch share improve this question The Application is a singleton which maintains a reference to the app delegate. You can always access your app delegate using UIApplication sharedApplication .delegate..

How to keep iphone ios xmpp connection alive while in the background?

http://stackoverflow.com/questions/8261135/how-to-keep-iphone-ios-xmpp-connection-alive-while-in-the-background

How to enable cancel button with UISearchBar?

http://stackoverflow.com/questions/9968595/how-to-enable-cancel-button-with-uisearchbar

Cancel button to the right of the search text field is disabled so that I cannot cancel the search. The contacts app maintains the cancel button in an enabled state. I think maybe one solution is to dive into the searchBar object and call resignFirstResponder..