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2014/10/15 ¤U¤È 10:11:20
iphone Programming Glossary: meaningWhat is the second parameter of NSLocalizedString()? http://stackoverflow.com/questions/1442822/what-is-the-second-parameter-of-nslocalizedstring improve this question The comment string is ignored by the application. It is used for a translator's benefit to add meaning to the contextual usage of the key where it is found in your application. For example the Hello_World_Key key may take different..
How to implement didReceiveMemoryWarning? http://stackoverflow.com/questions/2430728/how-to-implement-didreceivememorywarning it might give you some idea... void didReceiveMemoryWarning Release anything that's not essential such as cached data meaning instance variables and what else... Obviously can't access local variables such as defined in method loadView so can't release..
http://stackoverflow.com/questions/2978977/what-is-delegate-in-iphone is Delegate in iPhone what is the exact meaning of delegate in iphone how it is implemented in UIViewController iphone delegates share improve this question A delegate..
Converting NSString to NSDate (and back again) http://stackoverflow.com/questions/3917250/converting-nsstring-to-nsdate-and-back-again NSString to NSDate and back again How would I convert an NSString like 01 02 10 meaning 1st February 2010 into an NSDate And how could I turn the NSDate back into a string iphone objective c ios nsstring nsdate..
Passing parameters to addTarget:action:forControlEvents http://stackoverflow.com/questions/3988485/passing-parameters-to-addtargetactionforcontrolevents occurs touch up in your case . Controls can use 3 types of selectors to respond to actions all of them have predefined meaning of their parameters with no parameters action @selector switchToNewsDetails with 1 parameter indicating the control that..
iPhone Development - XMLParser vs. libxml2 vs. TouchXML http://stackoverflow.com/questions/406811/iphone-development-xmlparser-vs-libxml2-vs-touchxml used Regards. Mustafa iphone libxml2 xml parsing touchxml share improve this question NSXMLParser is a SAX parser meaning it steps through the XML document and informs you via delegate methods of various events such as starting an xml node finding..
iOS SDK - Programmatically generate a PDF file http://stackoverflow.com/questions/4362734/ios-sdk-programmatically-generate-a-pdf-file formatting layout needs of your PDF. EDIT response to 1st comment My implementation is part of a commercial product meaning that I can't share the full code but I can give a general outline I created a .xib file with a view and sized the view to..
How to send json data in the Http request using NSURLRequest http://stackoverflow.com/questions/4456966/how-to-send-json-data-in-the-http-request-using-nsurlrequest alloc initWithRequest request delegate self My first question is will this approach scale up Or is this not async meaning I block the UI thread while the app is waiting for the response My second question is how might I modify the request part..
Save Youtube video to iPhone in the app http://stackoverflow.com/questions/5087249/save-youtube-video-to-iphone-in-the-app video to documents folder and show progress of download play downloaded video by loading file from documents folder meaning even when not connected to the internet iphone objective c youtube offline mode share improve this question To download..
Why does viewWillAppear not get called when an app comes back from the background? http://stackoverflow.com/questions/5277940/why-does-viewwillappear-not-get-called-when-an-app-comes-back-from-the-backgroun visible and so viewWillAppear isn't called. I recommend against calling the viewWillAppear yourself it has a specific meaning which you shouldn't subvert A refactoring you can do to achieve the same effect might be as follows void viewWillAppear..
NSString retainCount is 2147483647 [duplicate] http://stackoverflow.com/questions/5483357/nsstring-retaincount-is-2147483647 are only ever created by the compiler. For which retain release autorelease retainCount are utterly devoid of meaning. As for why it is 2147483647 a picture is worth a thousand words. Or in this case 31 set bits. share improve this answer..
What does an underscore signify in the name of a member variable in Objective-C? [duplicate] http://stackoverflow.com/questions/5659156/what-does-an-underscore-signify-in-the-name-of-a-member-variable-in-objective-c coordinate self super init if self nil _coordinate coordinate return self @end Can anyone please explain me the meaning of the statement @synthesize coordinate _coordinate I know the meaning of @synthesize . But could not understand the complete.. self @end Can anyone please explain me the meaning of the statement @synthesize coordinate _coordinate I know the meaning of @synthesize . But could not understand the complete statement. _coordinate is a member variable. But what is coordinate..
When does an associated object get released? http://stackoverflow.com/questions/6039309/when-does-an-associated-object-get-released observes some properties of object A through KVO. The problem is that object B seems to be deallocated after object A meaning its too late to remove itself as a KVO observer of object A. I know this because I'm getting NSKVODeallocateBreak exceptions..
http://stackoverflow.com/questions/7271528/nslog-into-file c share improve this question Option 1 Use ASL NSLog outputs log to ASL Apple's version of syslog and console meaning it is already writing to a file in your Mac when you use the iPhone simulator. If you want to read it open the application..
Exception Types in iOS crash logs http://stackoverflow.com/questions/7446655/exception-types-in-ios-crash-logs Exception Type EXC_BAD_ACCESS SIGSEGV mean we are accessing a released object. No. A SIGSEGV is a segmentation fault meaning you are trying to access an invalid memory address. Those exceptions in fact they are signals are not related to Objective.. C but C. So you can get such an exception without Objective C objects. Note that a signal is not an exception meaning you can't catch them with @try and @catch blocks. You may set a signal handler with the signal and sigaction functions...
When do you make an underscore in front of an instance variable? [duplicate] http://stackoverflow.com/questions/837559/when-do-you-make-an-underscore-in-front-of-an-instance-variable Apple inside UIPickerView.h id UIPickerViewDataSource _dataSource why's that underscore there Does it have a special meaning A Convention I must know about iphone objective c cocoa cocoa touch share improve this question A lot of people use..
Custom iOS UIDatepicker using UIAppearance http://stackoverflow.com/questions/10844675/custom-ios-uidatepicker-using-uiappearance change the appearance of the DatePicker but looking for UI_APPEARANCE_SELECTOR in the UIDatePicker returns nothing . Meaning that its not possible to change any values as per the docs To support appearance customization a class must conform to the..
Opening Native App. from Safari http://stackoverflow.com/questions/2294286/opening-native-app-from-safari Native App. from Safari I know iPhone apps. operate like sandboxes. Meaning that they don't have access to other apps' files. And I have also managed to open a website in Safari from a Native App..
Can I access the text of my SMS messages using the iPhone SDK? http://stackoverflow.com/questions/2488679/can-i-access-the-text-of-my-sms-messages-using-the-iphone-sdk access the text of my SMS messages using the iPhone SDK Can I access the text of my SMS messages using the iPhone SDK Meaning existing messages not creating new ones. iphone share improve this question Correct you cannot access these on a standard..
Displaying ppt, doc, and xls in UIWebView doesn't work but pdf does http://stackoverflow.com/questions/2520137/displaying-ppt-doc-and-xls-in-uiwebview-doesnt-work-but-pdf-does loads fine and displays unprintable characters as expected. That's telling me the 'data' passed to loadData is ok. Meaning my mimetypes are bad And just to make sure my PPT DOC and XLS files are indeed ok to display I created a simple html file..
iPhone: how to use performSelector:onThread:withObject:waitUntilDone: method? http://stackoverflow.com/questions/2584394/iphone-how-to-use-performselectoronthreadwithobjectwaituntildone-method for this separate thread is the need to perform all the actions in the API TTS by Loquendo from one single thread. Meaning that I have to create an instance of the TTS object and call methods on that object from the same thread all the time. ..
Cocoa thread synchronisation when using [ALAssetsLibrary enumerateGroupsWithTypes:] http://stackoverflow.com/questions/3586911/cocoa-thread-synchronisation-when-using-alassetslibrary-enumerategroupswithtype library release if NSThread isMainThread NSLog @ main else NSLog @ non main My output from this was main main main Meaning that the block was being called in the main thread. It's just a separate event. To solve your problem you just need to return..
Asynchronous vs Synchronous vs Threading in an iPhone App http://stackoverflow.com/questions/371638/asynchronous-vs-synchronous-vs-threading-in-an-iphone-app I have a class say a singleton which is handling all of my data I can't use asynchronous requests in a getter method. Meaning the following won't go NSArray users if users nil users do_async_request NO GOOD return users whereas the following NSArray..
UIButton setTitle:forState: question http://stackoverflow.com/questions/4370466/uibutton-settitleforstate-question but NOT both When you bitwise or them together you are stating they must BOTH be set in the state property. Meaning UIControlStateHighlighted AND UIControlStateDisabled are set in the state property. The example code below perfectly illustrates..
Getting cell tower information in an iOS application? http://stackoverflow.com/questions/4567708/getting-cell-tower-information-in-an-ios-application question is this Is there a way through either the iOS SDK or third party frameworks to get cell tower location data Meaning cell tower location distance from you etc. The signal application for iOS does this so I know it's possible but I can't..
Why should we declare variables for @property http://stackoverflow.com/questions/4706816/why-should-we-declare-variables-for-property MyInterface NSObject @property assign NSInteger myVariable @implementation MyInterface @synthesize myVariable @end Meaning you can omit the NSInteger myVaribale in your interface declaration as long as you synthesize it in the .m the synthesize..
How do I set up an FTP connection? http://stackoverflow.com/questions/4805998/how-do-i-set-up-an-ftp-connection But even though it seemed relatively clear at first view. I still haven't been able to make a working connection. Meaning download or upload a sample file. One question I have for start Is this possible on the Simulator Another question is It..
Changing language on the fly, in running iOS, iphone app http://stackoverflow.com/questions/5109245/changing-language-on-the-fly-in-running-ios-iphone-app inside the app not only with the default language. From what I've tried I stuck like everybody with the reboot step. Meaning apples forces you to restart the app manually. Meaning you have to quit the app and then starting it up again. Well after.. what I've tried I stuck like everybody with the reboot step. Meaning apples forces you to restart the app manually. Meaning you have to quit the app and then starting it up again. Well after googling I was trying to setup an alarm and then forcing..
Memory leak problem and i need help #1 http://stackoverflow.com/questions/5696471/memory-leak-problem-and-i-need-help-1 memory leaks share improve this question It seams that you are returning the object only inside the if statement. Meaning that if the if statement is false you will not autorelease the array. Or maybe you didn't paste the entire method. Let me..
Tracking iOS installs from multiple marketing sources http://stackoverflow.com/questions/6231351/tracking-ios-installs-from-multiple-marketing-sources operate. I plan on marketing these apps on FaceBook and Google. I want to understand my funnel conversion by source. Meaning what is the install rate on FaceBook v. Google from start to finish. Outside of the app economy I would simply pass a parameter..
Is there an iPhone SDK API for twitter? http://stackoverflow.com/questions/757649/is-there-an-iphone-sdk-api-for-twitter has an API for integrating with facebook.com. Is there something similar for twitter.com and other social services Meaning these will look like native parts of your app objective c iphone share improve this question Try MGTwitterEngine share..
List of random numbers - arc4random http://stackoverflow.com/questions/9195468/list-of-random-numbers-arc4random of random numbers arc4random I want to create an array of numbers from 0 9 and want them to be randomized Meaning when a user clicks on a UIButton it creates an NSMutableArray of objects 4 5 8 3 6 2 9 1 7 0 When the user clicks on the..
Getting visible cell from UITableView pagingEnabled http://stackoverflow.com/questions/996515/getting-visible-cell-from-uitableview-pagingenabled UITableView pagingEnabled I have a UITableView with pagingEnabled. Each cell takes up the viewing area of the table. Meaning each cell is the same height and width as the table. I'm using custom cells that have a name property. I'd like to display..
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