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2014/10/15 ¤U¤È 10:08:01
iphone Programming Glossary: egHow to convert time to the timezone of the iPhone device? http://stackoverflow.com/questions/1081647/how-to-convert-time-to-the-timezone-of-the-iphone-device zone information. One way to convert NSDate objects from one timezone to another is The date in your source timezone eg. EST NSDate sourceDate NSDate date NSTimeZone sourceTimeZone NSTimeZone timeZoneWithAbbreviation @ EST NSTimeZone destinationTimeZone.. sourceTimeZone NSTimeZone timeZoneWithAbbreviation @ EST NSTimeZone destinationTimeZone NSTimeZone systemTimeZone NSInteger sourceGMTOffset sourceTimeZone secondsFromGMTForDate sourceDate NSInteger destinationGMTOffset destinationTimeZone secondsFromGMTForDate.. NSTimeZone systemTimeZone NSInteger sourceGMTOffset sourceTimeZone secondsFromGMTForDate sourceDate NSInteger destinationGMTOffset destinationTimeZone secondsFromGMTForDate sourceDate NSTimeInterval interval destinationGMTOffset..
Get notified when UITableView has finished asking for data? http://stackoverflow.com/questions/1483581/get-notified-when-uitableview-has-finished-asking-for-data early. None of them entirely understandably guarantee that queries to the data source have finished for the time being eg until the view is scrolled . One workaround I have found is to call reloadData in viewDidAppear since when reloadData returns..
Sending POST data from iphone over SSL HTTPS http://stackoverflow.com/questions/1571336/sending-post-data-from-iphone-over-ssl-https the user name and password to a web server previously i pass data using GET method and used the url with GET format eg localhost 8888 login userName admin password password but now i need to sent this as a POST data can any one help me to..
iPhone Dev: UIWebView baseUrl to resources in Documents folder not App bundle http://stackoverflow.com/questions/1926117/iphone-dev-uiwebview-baseurl-to-resources-in-documents-folder-not-app-bundle baseURL such that webView loadHTMLString fileXMLString baseURL pathToDirX ... webView does not recognize the resources eg style.css within dirCSS as href'ed within the fileXMLString link href dirCSS style.css rel stylesheet So currently my application.. load the html string but does not load the stylesheet as the link to the CSS within the html string are relative eg. css style.css Any help is very much appreciated iphone resources uiwebview share improve this question After some..
upload image from iphone to the server folder http://stackoverflow.com/questions/1939335/upload-image-from-iphone-to-the-server-folder few snippet from online to upload image from iphone to the server folder its showing to use server side scripting eg. use php at server side php uploaddir 'uploads ' file basename _FILES 'userfile' 'name' uploadfile uploaddir . file if move_uploaded_file..
Practical rules for premature optimization [closed] http://stackoverflow.com/questions/2978460/practical-rules-for-premature-optimization as a pro active goal rather than the natural result of simply avoiding distraction. The problem is the term is beginning to be applied more and more to cases that are completely inappropriate. For example I've seen a growing number of.. a growing number of people say not to worry about the complexity of an algorithm because that's premature optimization eg http stackoverflow.com questions 2190275 help sorting an nsarray across two properties with nssortdescriptor 2191720#2191720..
Detect retina screen/iPhone 4 in iPhone SDK http://stackoverflow.com/questions/3272752/detect-retina-screen-iphone-4-in-iphone-sdk I have been thinking about using the code snippet below which would return me a specific device identifier such as eg. iPhone3 yet then I would be limiting the detection to the iPhone4 and would need to update that code for any subsequent..
iPhone App Localization - English problems? http://stackoverflow.com/questions/3308519/iphone-app-localization-english-problems share improve this question iPhone localisations or is that localizations do not take any notice of the Region the user sets ie UK Aus NZ . There is only one English language translation available by default. However you can hack.. AppleLanguages int retVal UIApplicationMain argc argv nil nil pool release return retVal This pops the users language eg en into the language NSString and the users locale eg NZ GB AU into the locale NSString. If they in my case match en and.. nil nil pool release return retVal This pops the users language eg en into the language NSString and the users locale eg NZ GB AU into the locale NSString. If they in my case match en and GB then I set the users default language preference settings..
http://stackoverflow.com/questions/3339722/check-iphone-ios-version
Using the apple FFT and accelerate Framework http://stackoverflow.com/questions/3398753/using-the-apple-fft-and-accelerate-framework the hardest thing to understand. We are using the same container A all the way through the process. so in the beginning we want to fill it with n real numbers. after the FFT it is going to be holding n 2 complex numbers. we then throw.. later to avoid leaking setupReal vDSP_create_fftsetup log2n FFT_RADIX2 It's worth noting that if we set log2n to eg 8 you can throw these precalculated values into any fft function that uses resolution 2^8. So unless you want ultimate memory..
IPhone/IPad: How to get screen width programmatically? http://stackoverflow.com/questions/3655104/iphone-ipad-how-to-get-screen-width-programmatically for a while... thanks iphone objective c cocoa touch ipad share improve this question Take a look at UIScreen . eg. CGFloat width UIScreen mainScreen .bounds.size.width Take a look at the applicationFrame property if you don't want the..
Get RGB value from UIColor presets http://stackoverflow.com/questions/4700168/get-rgb-value-from-uicolor-presets read out the RGB values from the resulting bitmap. Note that this won't work for certain colors like pattern colors eg. UIColor groupTableViewBackgroundColor which don't have reasonable RGB values. void getRGBComponents CGFloat 3 components..
Can you use cancel/isCancelled with GCD/dispatch_async? http://stackoverflow.com/questions/5449469/can-you-use-cancel-iscancelled-with-gcd-dispatch-async @interface AstoundingView UIView BOOL pleaseAbandonYourEfforts blah @implementation AstoundingView these are the foreground routines... begin abandon and all done void userHasClickedToBuildASpaceship YourUIStateMachine buildShip self procedurallyBuildEnormousSpaceship.. UIView BOOL pleaseAbandonYourEfforts blah @implementation AstoundingView these are the foreground routines... begin abandon and all done void userHasClickedToBuildASpaceship YourUIStateMachine buildShip self procedurallyBuildEnormousSpaceship.. wrapper and the guts The wrapper MUST contain a we've finished message to home The guts can contain messages to home eg progress messages void procedurallyBuildEnormousSpaceship user has clicked button to build new spaceship pleaseAbandonYourEfforts..
How to read objective-c stack traces http://stackoverflow.com/questions/6462214/how-to-read-objective-c-stack-traces Http get params cacheMins msgPack complete 146 ... And i'm wondering how to read it I assume i go from the bottom up eg line 7 called line 6 called line 5 etc. What does the ' 112' on line 4 mean Is that a line number in the code file where..
What is the best way to deal with the NSDateFormatter locale “feature”? http://stackoverflow.com/questions/6613110/what-is-the-best-way-to-deal-with-the-nsdateformatter-locale-feature fmt release Then it works fine in the US and most locales UNTIL ... someone with their phone set to a 24 hour region sets the 12 24 hour switch in settings to 12. Then the above starts tacking AM or PM onto the end of the resulting string... 12 24 hour switch in settings to 12. Then the above starts tacking AM or PM onto the end of the resulting string. See eg NSDateFormatter am I doing something wrong or is this a bug And see https developer.apple.com library ios qa qa1480 _index.html.. they aren't going to fix it. The circumvention is apparently to set the locale of the date formatter for a specific region generally the US but this is a bit messy NSLocale loc NSLocale alloc initWithLocaleIdentifier @ en_US df setLocale loc..
Retain Cycles: Why is that such a bad thing? http://stackoverflow.com/questions/791322/retain-cycles-why-is-that-such-a-bad-thing to watch out and spend a long time studying each others code to avoid cycles. Some languages with garbage collectors eg C# can delete a group of objects that are no longer needed even if the group contains cycles. share improve this answer..
How to change a particular color in an image? http://stackoverflow.com/questions/8046643/how-to-change-a-particular-color-in-an-image the image is not looking great. I need the color change like photoshop. whether it is possible to do this in coregraphics or I have to use any other library. EDIT I need the color change to be like iQuikColor app iphone objective c image.. by the saturation and brightness channels that you saved in step one. There are several OpenCV iOS ports in the net eg http www.eosgarden.com en opensource opencv ios overview I haven't tried this myself but seems a good research direction...
Capturing mobile phone traffic on wireshark http://stackoverflow.com/questions/9555403/capturing-mobile-phone-traffic-on-wireshark will need to make sure you supply the right interface name for the capture and this varies from one device to another eg i eth0 or i tiwlan0 or use i any to log all interfaces For IOS 5 devices any network iOS 5 added a remote virtual interface..
http://stackoverflow.com/questions/11533204/ios-search-results-order NSNumericSearch NSDiacriticInsensitiveSearch NSWidthInsensitiveSearch NSForcedOrderingSearch NSRegularExpressionSearch Eg void search NSString searchText searchBar.text lowercaseString for int index 0 index availableCollectionArray count index..
How to call SOAP service from Phonegap (iPhone app) http://stackoverflow.com/questions/11542195/how-to-call-soap-service-from-phonegap-iphone-app JS CSS commonly communicating via XHR Ajax. It's better to use jQuery Ajax functions. You can get the details here . Eg Posting XML SOAP Requests AJAX Requests Between jQuery Simple jQuery client to call a SOAP web service If you find any cross..
which dataType will return the value (37.961498) as it is ? Double dint work http://stackoverflow.com/questions/19656315/which-datatype-will-return-the-value-37-961498-as-it-is-double-dint-work i am setting annotation and hence i have to set CLLocationCoordinate2DMake with some lat and lng parsed from googleAPI Eg lat 37.9615000 and lng 60.5566000 . I have the values in string hence i converted the sting to double and then assigned..
How to open call out MKAnnotationView programmatically? (iPhone, MapKit) http://stackoverflow.com/questions/2193843/how-to-open-call-out-mkannotationview-programmatically-iphone-mapkit programmatically iPhone MapKit I want to open up the callout for an MKPinAnnotationView programmatically. Eg I drop 10 pins on the map and want to open up the one closest to me. How would I go about doing this Apple has specified..
How to identify WHICH NSURLConnection did finish loading when there are multiple ones? http://stackoverflow.com/questions/2476302/how-to-identify-which-nsurlconnection-did-finish-loading-when-there-are-multiple DO I KNOW WHICH NSURLConnection returned I need to know so I can take action specific to the type of data that came. Eg. display a twitter update if it was the twitter xml data Eg. display an image if it was a photo How do people usually solve.. I can take action specific to the type of data that came. Eg. display a twitter update if it was the twitter xml data Eg. display an image if it was a photo How do people usually solve this iphone xcode uiviewcontroller nsurlconnection share..
optimizing iPhone OpenGL ES fill rate http://stackoverflow.com/questions/2785640/optimizing-iphone-opengl-es-fill-rate but maybe it is faster for other reasons Are there certain things to watch out for that could reduce performance Eg should I avoid glTranslate glColor4g etc I'm using glScissor in a 3 places per frame. Each use consists of 2 glScissor calls..
Alternatives to weak linking in iPhone SDK? http://stackoverflow.com/questions/3056016/alternatives-to-weak-linking-in-iphone-sdk the availability of new APIs using methods like NSClassFromString respondsToSelector instancesRespondToSelector etc. Eg. Weak linking against MessageUI.framework an old example but still relevant First check if the MFMailComposerController..
XCode 4 hangs at “Attaching to (app name)” http://stackoverflow.com/questions/5382968/xcode-4-hangs-at-attaching-to-app-name Packaging make sure your product name is the same for every build and equal to whatever it says it's attaching to. Eg if XCode is Hanging at Attaching to myLCBO but your product name is LCBO Finder then it won't build. That was exactly my..
How can I create objective-C Framework for iOS Application http://stackoverflow.com/questions/5389856/how-can-i-create-objective-c-framework-for-ios-application iOS Application I am in the middle of creating some generic classes that can be reusable for lot of application. For Eg Share Functions if we need this functionality in a project then we currently I need to add a group of classes into that..
how can I convert string to an array with separator? http://stackoverflow.com/questions/6111543/how-can-i-convert-string-to-an-array-with-separator I have a string in the following format myString cat dog cow I need to store each string separated by in to a array. Eg myArray 0 cat myArray 1 dog myArray 2 cow Can anyone tell me the proper way to do this iphone objective c xcode nsstring..
iPhone UIView Animation Best Practice http://stackoverflow.com/questions/630265/iphone-uiview-animation-best-practice of this method is discouraged in iPhone OS 4.0 and later. You should use the block based animation methods instead. Eg of Block based Animation based on Tom's Comment UIView transitionWithView mysuperview duration 0.75 options UIViewAnimationTransitionFlipFromRight..
Record the drawing as a m4v video file - OpenGL http://stackoverflow.com/questions/9661259/record-the-drawing-as-a-m4v-video-file-opengl the drawing as a m4v video file that should integrated my spoken instructions which I spoken while drawing the image. Eg After I clicked on Draw and Record button I started drawing a circle and spoken This is a circle . After I clicked the Done..
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