2014/10/15 下午 10:13:08

iphone Programming Glossary: rarely

UIView's frame, bounds, center, origin, when to use what?

http://stackoverflow.com/questions/1071112/uiviews-frame-bounds-center-origin-when-to-use-what

where movement or scaling may occur. By default animation and rotation will be based on the center of the UIView. It rarely makes sense to try and manage such objects by the frame property. bounds this property is not a positioning property but..

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

to events like network ports you need a run loop . Every NSThread automatically gets its own run loop and you very rarely have to concern yourself with them directly. The run loop is also in charge of creating and releasing autorelease pools...

NSCache is not evicting data

http://stackoverflow.com/questions/11520815/nscache-is-not-evicting-data

is not evicting data NSCache is a rarely used tool which actually looks quite useful. I created a simple experiment to see how it works and it looks like it dose..

Why is my CLLocation speed so inaccurate?

http://stackoverflow.com/questions/1180050/why-is-my-cllocation-speed-so-inaccurate

is absolutely inaccurate. In Low Speeds is always null and only at higher speeds it shows some values but they are rarely updated and noot really usefull. void locationManager CLLocationManager manager didUpdateToLocation CLLocation newLocation..

How can my server securely authenticate iPhone in-app purchase?

http://stackoverflow.com/questions/1581246/how-can-my-server-securely-authenticate-iphone-in-app-purchase

store using a Restored Transaction and re send it to the server just as though this was a new purchase. This should rarely need to be used but should be available to save the user having to re buy the product in the case of network failure. Multiple..

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

I began to realize that the CFNetwork framework was leaking memory occasionally. Exceptions were randomly however rarely being raised inside CFNetwork too I tried everything I could to avoid those problems but nothing worked. I am quite sure..

@property and retain, assign, copy, nonatomic in Objective-C

http://stackoverflow.com/questions/2255861/property-and-retain-assign-copy-nonatomic-in-objective-c

nonatomic vs. atomic atomic is the default. Always use nonatomic . I don't know why but the book I read said there is rarely a reason to use atomic . BTW The book I read is the BNR iOS Programming book. readwrite vs. readonly readwrite is the default...

Practical rules for premature optimization [closed]

http://stackoverflow.com/questions/2978460/practical-rules-for-premature-optimization

How do I launch my settings bundle from my application?

http://stackoverflow.com/questions/335965/how-do-i-launch-my-settings-bundle-from-my-application

style applications and in situations where you have preference values that are typically configured once and then rarely changed. For example the Mail application uses these preferences to store the user 䏭 account information and message checking..

How to recognize swipe gesture in UIScrollView

http://stackoverflow.com/questions/3648967/how-to-recognize-swipe-gesture-in-uiscrollview

. I've tried to create UISwipeGestureRecognizers and associate them with the scroll view. It works but very rarely. Most of the time I do not get called. Why How can I reliably get swiping left right to work Can I use the gesture recognizers..

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

in Mac OS X. When you lock the device your app deactivates but the device may or may not go to sleep iPhone OS rarely sleeps if the device is connected to main power i.e. via USB . It can sleep if running on battery however. A short time..

What is common case for @dynamic usage?

http://stackoverflow.com/questions/4524954/what-is-common-case-for-dynamic-usage

How do I retrieve a page number or page reference for an Outline destination in a PDF on iOS?

http://stackoverflow.com/questions/4643489/how-do-i-retrieve-a-page-number-or-page-reference-for-an-outline-destination-in

as a plain dictionary. In that case it's in the Dests entry of the Names dictionary in the document's catalog. I've rarely seen this though and it was deprecated after PDF 1.2 current is 1.7 . You will definitely need the PDF spec for this http..

NSNumber vs Int

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

you reuse a NSNumber often this is to avoid making a ton of duplicate NSNumber s. Such occurrences are practical only rarely beyond serialization and generic objc interfaces bindings transformers dictionaries . Update Details The ObjC runtime will..

performSelector may cause a leak because its selector is unknown

http://stackoverflow.com/questions/7017281/performselector-may-cause-a-leak-because-its-selector-is-unknown

but really it'd be better to simply use the IMP and function pointer methodology above. Since consumed parameters are rarely an issue this isn't likely to come up. Static Selectors Interestingly the compiler will not complain about selectors declared..

How to convert NSData to byte array in iPhone?

http://stackoverflow.com/questions/724086/how-to-convert-nsdata-to-byte-array-in-iphone

UIWebview and IPhone content does not postback (ASP.NET Browser Capability issues)

http://stackoverflow.com/questions/7275695/uiwebview-and-iphone-content-does-not-postback-asp-net-browser-capability-issue

events and it is never hit. Sometimes about once every 2 hours the postback DOES work on the iphone but extremely rarely and intermittently. Dd1 is a date dropdown that loads a time slot drop down that is dependent on the selected item in the..

What does 8badf00d mean?

http://stackoverflow.com/questions/773442/what-does-8badf00d-mean

code is 0x8badf00d. The stacktraces show random snapshots of app execution but nothing suspicious. This happens very rarely and I'm not able to find out how to reproduce it. Does anybody know more about this kind of exception and exception code..

iPhone - Setting background on UITableViewController

http://stackoverflow.com/questions/898351/iphone-setting-background-on-uitableviewcontroller

There's no point in avoiding a couple of autoreleases in a viewDidLoad method since it only gets called rarely when the view actually loads and will therefore have negligible impact on performance. N.B. You should always use PNG images..

Download image asynchronously

http://stackoverflow.com/questions/9763979/download-image-asynchronously

the back button and forward button when I try to go back and forth of the view repeatedly . Anyway this happens very rarely but I need to get rid of this bug. Is there any other library that does not use private API's that I could use in my project..