¡@
2014/10/15 ¤U¤È 10:09:23
iphone Programming Glossary: frequentlyCorrecting floating point numbers http://stackoverflow.com/questions/10049533/correcting-floating-point-numbers point numbers. For example When entered 32 32.1 Result 64.0999999999999 Also I must mention that this occurs quite frequently when using scientific notation. 2.3 10^23 1.452 10^23 Returns 3.339599999999999999e 46 And finally sometimes the number..
Does Apple reject Leaking iPhone apps? http://stackoverflow.com/questions/1136511/does-apple-reject-leaking-iphone-apps you run out of memory and crash then you might have an issue but the reason they reject you will be because you are frequently crashing while they test the app not that a leak is causing it. Of course they can reject things for any reason they want..
How can I take a photo frequently with iPhone? http://stackoverflow.com/questions/1325897/how-can-i-take-a-photo-frequently-with-iphone can I take a photo frequently with iPhone First sorry for my poor English Are there any ways to take a photo automatically with iPhone eg. I need to.. If you are not gonna do it by writing your own application. There's no way you can do that First taking photos frequently as you described needs private apis. That will make your app rejected from App Store. If that's okay read the instructions..
Tricks for improving iPhone UITableView scrolling performance? http://stackoverflow.com/questions/1352479/tricks-for-improving-iphone-uitableview-scrolling-performance scrolling uiimage share improve this question Cache the height of the rows 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..
Advice on speeding up OpenGL ES 1.1 on the iPhone http://stackoverflow.com/questions/1844765/advice-on-speeding-up-opengl-es-1-1-on-the-iphone yielded another performance increase. I'm now consistently getting 30 FPS. Tiler Utilization is still around 90 but frequently drops down in the the 70 80 range. The Renderer Utilization is hovering around 50 . I suppose this might have something..
Suppressing deprecated warnings in Xcode http://stackoverflow.com/questions/2622017/suppressing-deprecated-warnings-in-xcode to be able to build for multiple SDKs and platforms. However bouncing from 3.2 to 3.0 and even occasionally 2.x I frequently get deprecated warnings involving methods that have changed or been superseded warning 'UIKeyboardBoundsUserInfoKey' is..
Detecting Acceleration in a car (iPhone Accelerometer) http://stackoverflow.com/questions/2733249/detecting-acceleration-in-a-car-iphone-accelerometer to make sure that I am not using a force just because the iPhone accelerometer was off by a bit which happens more frequently than I would like . But if I plot these vectors that I am using they actually vary by an angle of about 20 30 degrees which..
Fast and Lean PDF Viewer for iPhone / iPad / iOs - tips and hints? http://stackoverflow.com/questions/3889634/fast-and-lean-pdf-viewer-for-iphone-ipad-ios-tips-and-hints Matt Gallagher Johann Save any media to disk when you can. Use larger tileSizes if rendering on TiledLayers init frequently used arrays with placeholder objects alternitively another design approach is this one Note that images will render faster..
http://stackoverflow.com/questions/4097044/pdf-search-on-the-iphone annotations from a PDF using Quartz I've managed to do it and posted my code . Now I'd like to do the same for another frequently asked question searching PDF documents with Quartz. Same situation as before this question has been asked many times with..
Iphone - when to calculate heightForRowAtIndexPath for a tableview when each cell height is dynamic? http://stackoverflow.com/questions/4823197/iphone-when-to-calculate-heightforrowatindexpath-for-a-tableview-when-each-cel intention is that this is a faster and light on memory method that can be called for every row in the table quite frequently. This contrasts with cellForRowAtIndexPath which is often slower and more memory intensive but is only called for the rows..
NSMutableString as retain/copy http://stackoverflow.com/questions/4995254/nsmutablestring-as-retain-copy easier and more efficient in many cases to use a copied NSString ivar when your string is small or does not change frequently. by adding the mutable string to the interface as above you'll have to guarantee thread safety manually. in many cases it..
What are the Dangers of Method Swizzling in Objective C? http://stackoverflow.com/questions/5339276/what-are-the-dangers-of-method-swizzling-in-objective-c changing too much to be safe. Possible naming conflicts Naming conflicts are an issue all throughout Cocoa. We frequently prefix class names and method names in categories. Unfortunately naming conflicts are a plague in our language. In the case..
Can you use cancel/isCancelled with GCD/dispatch_async? http://stackoverflow.com/questions/5449469/can-you-use-cancel-iscancelled-with-gcd-dispatch-async needs to respond if some of those methods calls are fairly short you may be able to get away with checking less frequently. You asked whether you could use the NSOperation flags to support cancellation. The answer is no. GCD is not based on NSOperation...
What are the limitations of NSUserDefaults? http://stackoverflow.com/questions/6173625/what-are-the-limitations-of-nsuserdefaults is fast. So why not use this as a permanent storage What are the limitations of NSUserDefaults as a database Update I frequently use three different ways of saving my data to disk. Core data Serializing objects to plists NSUserDefaults I do not use..
iOS recurring subscription policy for service, not content http://stackoverflow.com/questions/6184902/ios-recurring-subscription-policy-for-service-not-content Purchase type. The Auto Renewable Subscription product is best suited for apps that require or feature dynamically or frequently changing content such as digital periodicals or radio subscriptions. Even though when creating an iAP product there is a..
Objective C class names with a + http://stackoverflow.com/questions/6687074/objective-c-class-names-with-a of adding methods but not instance variables to a class you don't necessarily have the source to. For example if you frequently want to make upside down copies of UIImages you can use a category to add a upsideDownImage method onto the UIImage class...
Best practices for handling user preferences in an iPhone MVC app? http://stackoverflow.com/questions/962591/best-practices-for-handling-user-preferences-in-an-iphone-mvc-app he's in a good position to pass the options between them but again that seems wrong. Finally MainViewController will frequently need to access the options. Should he call into the options model each time to get some option or cache his own copy I don't..
http://stackoverflow.com/questions/9661845/json-parser-example-for-ios5 iphone objective c json sqlite ios5 share improve this question You may want to refer to SBJSON Framework which is frequently used for objective C I have used this framework in may of my iOS Apps. You may get a reference about it from these links..
|