2014/10/15 下午 10:05:27

iphone Programming Glossary: considerations

http://stackoverflow.com/questions/13613239/drifting-yaw-angle-after-moving-fast

information about the full rotation status contained in a quaternion. I decided to it that way for strategical considerations I think most developers do tilt motion detection with the gravity vector rather than CMAttitude.quaternion because most..

How to optimize Core Data query for full text search

http://stackoverflow.com/questions/1774369/how-to-optimize-core-data-query-for-full-text-search

store about indexes. I see some nice advantages of Core Data in my iPhone app. The faulting and other memory considerations allow for efficient database retrievals for tableview queries without setting arbitrary limits. The object graph management..

Designing the iPhone interface in a nib or in code?

http://stackoverflow.com/questions/1816964/designing-the-iphone-interface-in-a-nib-or-in-code

of course always strive to make your code and associated resources as reusable as possible. This could include design considerations to ensure that you don't unnecessarily duplicate view controller subclasses that are very similar. share improve this answer..

Using quaternion instead of roll, pitch and yaw to track device motion

http://stackoverflow.com/questions/19239482/using-quaternion-instead-of-roll-pitch-and-yaw-to-track-device-motion

class instead like cocoamath you need at least Quaternion.h .m and QuaternionOperation.m from trunk . Now the basic considerations The difference or sometimes stated as division between two quaternions being defined as the angular displacement from one..

how to convert a CVImageBufferRef to UIImage

http://stackoverflow.com/questions/3152259/how-to-convert-a-cvimagebufferref-to-uiimage

it in non planar format at all the reasoning for which is not stated but I can reasonably assume is due to performance considerations. Caveat I've not done this and am assuming that accessing the CVPixelBufferRef contents like this is a reasonable way to..

How should I approach building a Universal iOS app that will include iOS 4 features, even though the iPad doesn't yet run iOS 4?

http://stackoverflow.com/questions/3320355/how-should-i-approach-building-a-universal-ios-app-that-will-include-ios-4-featu

I understand this issue involves managing risks. I'm aware of the risks but I'm more interested in any tech design considerations related to building a universal app when the iOS is fragmented among the various iOS devices. iphone ipad ios4 universal..

How to determine at run-time if app is for development, app store or ad hoc distribution?

http://stackoverflow.com/questions/3426467/how-to-determine-at-run-time-if-app-is-for-development-app-store-or-ad-hoc-dist

a few other things in the entitlements provisioning profile but nothing more reliable that I can think of . Security considerations Neither of these are that difficult to circumvent. For the first method the app could just swizzle NSBundle pathForResource..

NSMutableString as retain/copy

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

the scope of traditional retain release mechanisms NS Type subclasses could implement another scheme although usual considerations of this are flawed Do I need to consider some other things as well now we get to the NSMutable type details. the implementation.. also implies a lot of unnecessary things and introduces additional copy overhead. let's re evaluate this. additional considerations problems at this point the default setter requires that the client makes a mutableCopy of the string if they only hold an..

how to stop nsthread

http://stackoverflow.com/questions/5193062/how-to-stop-nsthread

a new thread canceling that new thread cancel is a proper way to stop a thread if your thread method follows the considerations listed in the documentation then releasing your extra Messages instance. At this point your original Messages instance is..

Best practice for offline website in iOS

http://stackoverflow.com/questions/5732508/best-practice-for-offline-website-in-ios

putting all the html in the database and just having the images css videos etc. downloaded and put in the bundle. Some considerations Many links will be local to the device but some will be to outside sites. I will need to be able to do full text search..

Transitioning from OpenGL ES 1.1 to OpenGL ES 2.0

http://stackoverflow.com/questions/5866256/transitioning-from-opengl-es-1-1-to-opengl-es-2-0

substitutes for these functions e.g your own glTranslatef glPushmatrix etc Will this mean performance hit What other considerations are there for transitioning to ES 2.0 What advantages and disadvantages besides the obvious device support issue comes with..

Can you use Objective-C categories to clean up backwards compatibility with older SDKs?

http://stackoverflow.com/questions/7324265/can-you-use-objective-c-categories-to-clean-up-backwards-compatibility-with-olde

you use Objective C categories to clean up backwards compatibility with older SDKs There are 2 main considerations to take into account when thinking about backward compatibility build target current SDK for compilation If I compile with..

NSString: isEqual vs. isEqualToString

http://stackoverflow.com/questions/1292862/nsstring-isequal-vs-isequaltostring

is not a string. isEqualToString is faster if you know both objects are strings as the documentation states Special Considerations When you know both objects are strings this method is a faster way to check equality than isEqual . isEqualTo Class is used..

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

device on a private network with a host of the same name as yours since they won't have your SSL certificate. Failure Considerations Since failure might occur between when the user's device gets the receipt and verifying it with your server for example..

When to call release on NSURLConnection delegate?

http://stackoverflow.com/questions/1632168/when-to-call-release-on-nsurlconnection-delegate

NSURLConnection_Class Reference Reference.html# apple_ref doc uid 20001697 BAJDDIDG initWithRequest delegate Special Considerations The connection retains delegate. It releases delegate when the connection finishes loading fails or is canceled. So taking..

drawRect not being called in my subclass of UIImageView

http://stackoverflow.com/questions/2612152/drawrect-not-being-called-in-my-subclass-of-uiimageview

to debug a Release build. I somehow missed the first time that you're subclassing UIImageView. From the docs Special Considerations The UIImageView class is optimized to draw its images to the display. UIImageView will not call drawRect a subclass. If..

jpg images in iphone and 2x images

http://stackoverflow.com/questions/6595365/jpg-images-in-iphone-and-2x-images

See iOS Application Programming Guide for more information on supporting images with different scale factors. Special Considerations On iOS 4 and later the name of the file is not required to specify the filename extension. Prior to iOS 4 you must specify..

UIDevice uniqueIdentifier Deprecated - What To Do Now?

http://stackoverflow.com/questions/6993325/uidevice-uniqueidentifier-deprecated-what-to-do-now

suggest any ideas how we might handle this problem going forward The suggestion from the documentation is... Special Considerations Do not use the uniqueIdentifier property. To create a unique identifier specific to your app you can call the CFUUIDCreate..