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2014/10/15 ¤U¤È 10:12:50
iphone Programming Glossary: practicalhttp://stackoverflow.com/questions/11177066/how-to-use-ios-reachability message. Is this the main purpose of Reachability to show the user a message Or do I need to use it for other more practical scenarios For example if NSURLConnaction request has failed do I need to use Reachability somehow to resend the request..
Bug in UIKit string drawing method? http://stackoverflow.com/questions/11589768/bug-in-uikit-string-drawing-method I was having in my application I had to create a sample with a slightly exaggerated repeat rate that might not be practical but one that demonstrates exactly what was happening in my app. When drawing an NSString on a background thread using NSOperations..
http://stackoverflow.com/questions/1180550/weird-switch-error-in-obj-c declaration . I have not investigated whether or not this is an unintentional over sight of the C99 language spec in practical terms a bug in the C99 standard or if this is a pragmatic concession to the complexities of writing language grammars. If..
When to use a UIView vs. a UIViewController on the iPhone? http://stackoverflow.com/questions/1690852/when-to-use-a-uiview-vs-a-uiviewcontroller-on-the-iphone touch share improve this question I highly recommend reading Apple's UIViewController Programming Guide . The main practical reason to use a custom UIViewController especially in a simple application that doesn't use navigation is to handle rotation...
http://stackoverflow.com/questions/2080644/is-it-possible-in-principle-for-an-android-device-to-interface-with-an-iphone for an Android device to interface with an iPhone over Bluetooth GameKit I am not interested in pure theory but as a practical near or mid term possibility say within 12 24 months. As a developer familiar with but not specializing in two major smartphone..
Practical rules for premature optimization [closed] http://stackoverflow.com/questions/2978460/practical-rules-for-premature-optimization and O n complexity algorithm is irrelevant What about O n vs O n n What do you consider premature optimization What practical rules do you use to consciously or unconsciously avoid it EDIT I know my description is a bit general but I'm interested.. to consciously or unconsciously avoid it EDIT I know my description is a bit general but I'm interested in specific practical rules or best practices people use to avoid pre mature optimization particularly on the iphone platform . Answering this..
Difference between [UIImage imageNamed…] and [UIImage imageWithData…]? http://stackoverflow.com/questions/316236/difference-between-uiimage-imagenamed-and-uiimage-imagewithdata uses more memory Since I don't trust people on most other forums I thought I'd ask the question here is there any practical difference and if so which one is 'better' I have tried profiling my app using the Object Allocation instrument and I can't.. if so which one is 'better' I have tried profiling my app using the Object Allocation instrument and I can't see any practical difference though I have only tried in the simulator and not on an iPhone itself. iphone cocoa touch share improve this..
Drawing shadow with Quartz is slow on iPhone & iPad. Another way? http://stackoverflow.com/questions/3677564/drawing-shadow-with-quartz-is-slow-on-iphone-ipad-another-way is shown... even when launched outside of the debugger. Is there something I'm forgetting or is this method just not practical for larger views For reference I posted a screenshot here . iphone ipad uiview quartz graphics shadow share improve this..
Get PDF hyperlinks on iOS with Quartz http://stackoverflow.com/questions/4080373/get-pdf-hyperlinks-on-ios-with-quartz know this is a feature I see on every PDF reader this same question has been asked multiple times here with no real practical answers. I usually never ask for sample code directly but apparently this time I really need it... anyone got this working..
http://stackoverflow.com/questions/4097044/pdf-search-on-the-iphone searching PDF documents with Quartz. Same situation as before this question has been asked many times with almost no practical answers. So I need some pointers first as I still haven't implemented this myself. What I tried I tried using CGPDFScannerScan.. on those values but I've been reading the spec for hours... it's a bloated mess and I'm going insane. Anyone with a practical explanation Update User Naveen Thunga found PDFKitten a framework for extracting data from PDFs in iOS . I just tried the..
self.window.rootViewController vs window addSubview http://stackoverflow.com/questions/5248460/self-window-rootviewcontroller-vs-window-addsubview addSubview someController.view 1 as opposed to self.window.rootViewController self.someController 2 Is there any practical reason to use one over the other Is one technically correct Do controller's have an equivalent command to number 2 like..
iOS: how to perform an HTTP POST request? http://stackoverflow.com/questions/5537297/ios-how-to-perform-an-http-post-request me to have a delegate object which in turn will handle data events. Could someone please clarify the task with a practical example I should contact an https endpoint sending authentication data username and password and getting back a plain text..
Set to nil in viewDidUnload, but release in dealloc http://stackoverflow.com/questions/5737312/set-to-nil-in-viewdidunload-but-release-in-dealloc articles keep on repeating the same thing. Yes I know the behind the scene instructions are different but what are the practical differences var nil If var is a retained propery reclaim memory the old object var pointed to. Set var to nil. var release.. real question here is what you do in dealloc . Many people suggest that it's perfectly fine to say self.label nil and practically speaking this will work most of the time. The problem is the rest of the time it will cause subtle bugs. There are two..
What is the maximum length of an NSString object? http://stackoverflow.com/questions/6482641/what-is-the-maximum-length-of-an-nsstring-object is 2^32 1 and NSString can hold a little over 4.2 billion characters. As others have pointed out though the practical limit is much smaller on an iOS device especially you'll run out of memory long before you hit any hard limit in NSString...
http://stackoverflow.com/questions/6662730/nsnumber-vs-int typically when 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..
iOS 5: Any way to prevent keyboard splitting? http://stackoverflow.com/questions/7809997/ios-5-any-way-to-prevent-keyboard-splitting
Syntax help - Variable as object name [duplicate] http://stackoverflow.com/questions/7940809/syntax-help-variable-as-object-name this question There isn't anything like this in the Objective C language and in general it's not going to be a very practical way of referring to data what if you typo a string the compiler won't be able to catch it . I won't get into second guessing..
http://stackoverflow.com/questions/14659563/to-drawrect-or-not-to-drawrect-when-should-one-use-drawrect-core-graphics-vs-su tables. In fact it's a suggested method in Apple's Table Sample Code has been suggested in several WWDC videos Practical Drawing for iOS Developers and many iOS programming books . There are even awesome looking tools to design graphics and..
Question about factory method object lifetimes in Objective-C/Cocoa (to retain or not…) http://stackoverflow.com/questions/2017793/question-about-factory-method-object-lifetimes-in-objective-c-cocoa-to-retain-o
Practical rules for premature optimization [closed] http://stackoverflow.com/questions/2978460/practical-rules-for-premature-optimization rules for premature optimization closed It seems that the phrase Premature Optimization is the buzz word of the day. For..
Practical efficient usage of IBOutletColletion http://stackoverflow.com/questions/3635638/practical-efficient-usage-of-iboutletcolletion efficient usage of IBOutletColletion How does look the practical usage of IBOutletCollection Unfortunately Apple documentation..
Grand Central Dispatch (GCD) with CoreData http://stackoverflow.com/questions/4264540/grand-central-dispatch-gcd-with-coredata
iphone / Objective C - Comparing doubles not working http://stackoverflow.com/questions/4732645/iphone-objective-c-comparing-doubles-not-working
Is there a way to make drawRect work right NOW? http://stackoverflow.com/questions/4739748/is-there-a-way-to-make-drawrect-work-right-now deceases. Note that this applies to both doing it properly background look or using one of the 'immediate' methods. Practical solutions ........................ For anyone reading in the future if you are actually unable to get this to work in production..
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