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2014/10/15 ¤U¤È 10:12:15
iphone Programming Glossary: objectHow to check for an active Internet Connection on iPhone SDK? http://stackoverflow.com/questions/1083701/how-to-check-for-an-active-internet-connection-on-iphone-sdk is deprecated in 3.0 And if so what is a better way to accomplish this iphone objective c ios cocoa touch reachability share improve this question METHOD 1 Use a simple ARC and GCD.. addObserver self selector @selector checkNetworkStatus name kReachabilityChangedNotification object nil internetReachable Reachability reachabilityForInternetConnection internetReachable startNotifier..
How to make a UITextField move up when keyboard is present http://stackoverflow.com/questions/1126726/how-to-make-a-uitextfield-move-up-when-keyboard-is-present up or center the lower text fields in the visible area which is what I would really like. iphone objective c ios share improve this question You will need a scroll view if the contents you have now does.. addObserver self selector @selector keyboardWillShow name UIKeyboardWillShowNotification object nil NSNotificationCenter defaultCenter addObserver self selector @selector keyboardWillHide name.. addObserver self selector @selector keyboardWillHide name UIKeyboardWillHideNotification object nil void viewWillDisappear BOOL animated unregister for keyboard notifications while not visible. NSNotificationCenter..
How can I upload a photo to a server with the iPhone? http://stackoverflow.com/questions/125306/how-can-i-upload-a-photo-to-a-server-with-the-iphone NULL errorSelector NULL super dealloc Uploader filePath Gets the path of the file this object is uploading. Results Path to the upload file. Side effects None NSString filePath return filePath.. Private compress Uses zlib to compress the given data. Results The compressed data as a NSData object. Side effects None NSData compress NSData data IN if data data length 0 return nil zlib compress..
Send and receive messages through NSNotificationCenter in Objective-C? [closed] http://stackoverflow.com/questions/2191594/send-and-receive-messages-through-nsnotificationcenter-in-objective-c example program to send and receive a message through NSNotificationCenter in Objective C iphone objective c ios nsnotificationcenter share improve this question @implementation TestClass void dealloc.. remove yourself as an observer the Notification Center will continue to try and send notification objects to the deallocated object. NSNotificationCenter defaultCenter removeObserver self super dealloc id.. the Notification Center will continue to try and send notification objects to the deallocated object. NSNotificationCenter defaultCenter removeObserver self super dealloc id init self super init if self..
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 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 than a CGPDFPageRef.. can especially if they will be using memory beware of leaving contexts open though Recycle page objects by doing pointer swaps or destroy unused views Close any open Contexts as soon as you don't need them.. CGContextConcatCTM context pdfToPageTransform CGContextDrawPDFPage context pdfPage issue is the object containg the CGPDFDocumentRef . I synchronize the part where I access the pdfDoc property because I..
How do I create delegates in Objective-C? http://stackoverflow.com/questions/626898/how-do-i-create-delegates-in-objective-c C I know how delegates work and I know how I can use them. But how do I create them iphone ios objective c cocoa delegates share improve this question An Objective C delegate is just an object that.. ios objective c cocoa delegates share improve this question An Objective C delegate is just an object that has been assigned as a delegate of another. There's no special process for creating them you simply.. is typically declared weak in ARC or assign pre ARC to avoid retain loops since the delegate of an object often holds a strong reference to that object. For example a view controller is often the delegate of..
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 en_US_POSIX2 localeIdentifier self setLocale en_US_POSIX2 NSLog @ Category's object @ and object's locale @ @ self.description self.locale.description self.locale localeIdentifier return.. en_US_POSIX2 localeIdentifier self setLocale en_US_POSIX2 NSLog @ Category's object @ and object's locale @ @ self.description self.locale.description self.locale localeIdentifier return self @end.. locale __NSCFLocale 0x160550 en_US_POSIX 2011 07 15 16 35 24.338 DemoApp 214 307 Category's object NSDateFormatter 0x160d90 and object's locale __NSCFLocale 0x12be70 en_GB 2011 07 15 16 35 24.345 DemoApp..
How to check for an active Internet Connection on iPhone SDK? http://stackoverflow.com/questions/1083701/how-to-check-for-an-active-internet-connection-on-iphone-sdk NULL YES NO Is what I have done bad Not to mention stringWithContentsOfURL is deprecated in 3.0 And if so what is a better way to accomplish this iphone objective c ios cocoa touch reachability share improve this question METHOD 1 Use a simple ARC and GCD compatible class to do it 1 Add SystemConfiguration framework.. check for internet connection NSNotificationCenter defaultCenter addObserver self selector @selector checkNetworkStatus name kReachabilityChangedNotification object nil internetReachable Reachability reachabilityForInternetConnection internetReachable startNotifier check if a pathway to a random host exists hostReachable Reachability..
How to make a UITextField move up when keyboard is present http://stackoverflow.com/questions/1126726/how-to-make-a-uitextfield-move-up-when-keyboard-is-present 215 50 resize However this doesn't automatically move up or center the lower text fields in the visible area which is what I would really like. iphone objective c ios share improve this question You will need a scroll view if the contents you have now does not fit in the iPhone screen. If you are adding the scroll.. for keyboard notifications NSNotificationCenter defaultCenter addObserver self selector @selector keyboardWillShow name UIKeyboardWillShowNotification object nil NSNotificationCenter defaultCenter addObserver self selector @selector keyboardWillHide name UIKeyboardWillHideNotification object nil void viewWillDisappear.. object nil NSNotificationCenter defaultCenter addObserver self selector @selector keyboardWillHide name UIKeyboardWillHideNotification object nil void viewWillDisappear BOOL animated unregister for keyboard notifications while not visible. NSNotificationCenter defaultCenter removeObserver self name..
How can I upload a photo to a server with the iPhone? http://stackoverflow.com/questions/125306/how-can-i-upload-a-photo-to-a-server-with-the-iphone release filePath nil delegate release delegate nil doneSelector NULL errorSelector NULL super dealloc Uploader filePath Gets the path of the file this object is uploading. Results Path to the upload file. Side effects None NSString filePath return filePath @end Uploader @implementation EPUploader Private Uploader.. setHTTPBody postData return urlRequest Uploader Private compress Uses zlib to compress the given data. Results The compressed data as a NSData object. Side effects None NSData compress NSData data IN if data data length 0 return nil zlib compress doc says destSize must be 1 12 bytes greater than source...
Send and receive messages through NSNotificationCenter in Objective-C? [closed] http://stackoverflow.com/questions/2191594/send-and-receive-messages-through-nsnotificationcenter-in-objective-c NSNotificationCenter in Objective C closed I need a simple example program to send and receive a message through NSNotificationCenter in Objective C iphone objective c ios nsnotificationcenter share improve this question @implementation TestClass void dealloc If you don't remove yourself as an observer the Notification.. @implementation TestClass void dealloc If you don't remove yourself as an observer the Notification Center will continue to try and send notification objects to the deallocated object. NSNotificationCenter defaultCenter removeObserver self super dealloc id init self super init if self return nil Add this instance of.. void dealloc If you don't remove yourself as an observer the Notification Center will continue to try and send notification objects to the deallocated object. NSNotificationCenter defaultCenter removeObserver self super dealloc id init self super init if self return nil Add this instance of TestClass as an observer of..
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 than a CGPDFPageRef Use NSOperations or GCD Blocks to prepare pages ahead.. docRef into a singleton. Cancel needless NSOperations When you can especially if they will be using memory beware of leaving contexts open though Recycle page objects by doing pointer swaps or destroy unused views Close any open Contexts as soon as you don't need them on receiving memory warnings release and reload the DocRef.. pdfPage kCGPDFMediaBox layer.bounds 0 true CGContextConcatCTM context pdfToPageTransform CGContextDrawPDFPage context pdfPage issue is the object containg the CGPDFDocumentRef . I synchronize the part where I access the pdfDoc property because I release it and recreate it when receiving memoryWarnings. It..
How do I create delegates in Objective-C? http://stackoverflow.com/questions/626898/how-do-i-create-delegates-in-objective-c do I create delegates in Objective C I know how delegates work and I know how I can use them. But how do I create them iphone ios objective c cocoa delegates share improve this question An Objective C delegate is just an object that has been assigned as a delegate of another. There's no special.. I know how I can use them. But how do I create them iphone ios objective c cocoa delegates share improve this question An Objective C delegate is just an object that has been assigned as a delegate of another. There's no special process for creating them you simply define a class that implements the delegate methods you're.. windowDidMove notification The delegate property itself is typically declared weak in ARC or assign pre ARC to avoid retain loops since the delegate of an object often holds a strong reference to that object. For example a view controller is often the delegate of a view it contains. To define your own delegates you'll have..
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 @ en_US_POSIX NSLog @ Category's locale @ @ en_US_POSIX2.description en_US_POSIX2 localeIdentifier self setLocale en_US_POSIX2 NSLog @ Category's object @ and object's locale @ @ self.description self.locale.description self.locale localeIdentifier return self @end Basically just changed the name of the static locale.. @ en_US_POSIX NSLog @ Category's locale @ @ en_US_POSIX2.description en_US_POSIX2 localeIdentifier self setLocale en_US_POSIX2 NSLog @ Category's object @ and object's locale @ @ self.description self.locale.description self.locale localeIdentifier return self @end Basically just changed the name of the static locale variable.. NSLog prints 2011 07 15 16 35 24.322 DemoApp 214 307 Category's locale __NSCFLocale 0x160550 en_US_POSIX 2011 07 15 16 35 24.338 DemoApp 214 307 Category's object NSDateFormatter 0x160d90 and object's locale __NSCFLocale 0x12be70 en_GB 2011 07 15 16 35 24.345 DemoApp 214 307 dateString 2011 07 15 04 35 24 PM 2011 07 15 16..
How to check for an active Internet Connection on iPhone SDK? http://stackoverflow.com/questions/1083701/how-to-check-for-an-active-internet-connection-on-iphone-sdk Not to mention stringWithContentsOfURL is deprecated in 3.0 And if so what is a better way to accomplish this iphone objective c ios cocoa touch reachability share improve this question METHOD 1 Use a simple ARC and GCD compatible class to.. defaultCenter addObserver self selector @selector checkNetworkStatus name kReachabilityChangedNotification object nil internetReachable Reachability reachabilityForInternetConnection internetReachable startNotifier check if a pathway..
How to make a UITextField move up when keyboard is present http://stackoverflow.com/questions/1126726/how-to-make-a-uitextfield-move-up-when-keyboard-is-present automatically move up or center the lower text fields in the visible area which is what I would really like. iphone objective c ios share improve this question You will need a scroll view if the contents you have now does not fit in the iPhone.. defaultCenter addObserver self selector @selector keyboardWillShow name UIKeyboardWillShowNotification object nil NSNotificationCenter defaultCenter addObserver self selector @selector keyboardWillHide name UIKeyboardWillHideNotification.. defaultCenter addObserver self selector @selector keyboardWillHide name UIKeyboardWillHideNotification object nil void viewWillDisappear BOOL animated unregister for keyboard notifications while not visible. NSNotificationCenter defaultCenter..
How can I upload a photo to a server with the iPhone? http://stackoverflow.com/questions/125306/how-can-i-upload-a-photo-to-a-server-with-the-iphone nil doneSelector NULL errorSelector NULL super dealloc Uploader filePath Gets the path of the file this object is uploading. Results Path to the upload file. Side effects None NSString filePath return filePath @end Uploader @implementation.. Uploader Private compress Uses zlib to compress the given data. Results The compressed data as a NSData object. Side effects None NSData compress NSData data IN if data data length 0 return nil zlib compress doc says destSize..
Send and receive messages through NSNotificationCenter in Objective-C? [closed] http://stackoverflow.com/questions/2191594/send-and-receive-messages-through-nsnotificationcenter-in-objective-c I need a simple example program to send and receive a message through NSNotificationCenter in Objective C iphone objective c ios nsnotificationcenter share improve this question @implementation TestClass void dealloc If you don't remove.. dealloc If you don't remove yourself as an observer the Notification Center will continue to try and send notification objects to the deallocated object. NSNotificationCenter defaultCenter removeObserver self super dealloc id init self super init.. yourself as an observer the Notification Center will continue to try and send notification objects to the deallocated object. NSNotificationCenter defaultCenter removeObserver self super dealloc id init self super init if self return nil Add this..
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 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 than a CGPDFPageRef Use NSOperations.. NSOperations When you can especially if they will be using memory beware of leaving contexts open though Recycle page objects by doing pointer swaps or destroy unused views Close any open Contexts as soon as you don't need them on receiving memory.. layer.bounds 0 true CGContextConcatCTM context pdfToPageTransform CGContextDrawPDFPage context pdfPage issue is the object containg the CGPDFDocumentRef . I synchronize the part where I access the pdfDoc property because I release it and recreate..
How do I create delegates in Objective-C? http://stackoverflow.com/questions/626898/how-do-i-create-delegates-in-objective-c in Objective C I know how delegates work and I know how I can use them. But how do I create them iphone ios objective c cocoa delegates share improve this question An Objective C delegate is just an object that has been assigned as.. create them iphone ios objective c cocoa delegates share improve this question An Objective C delegate is just an object that has been assigned as a delegate of another. There's no special process for creating them you simply define a class.. property itself is typically declared weak in ARC or assign pre ARC to avoid retain loops since the delegate of an object often holds a strong reference to that object. For example a view controller is often the delegate of a view it contains...
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 locale @ @ en_US_POSIX2.description en_US_POSIX2 localeIdentifier self setLocale en_US_POSIX2 NSLog @ Category's object @ and object's locale @ @ self.description self.locale.description self.locale localeIdentifier return self @end Basically.. @ @ en_US_POSIX2.description en_US_POSIX2 localeIdentifier self setLocale en_US_POSIX2 NSLog @ Category's object @ and object's locale @ @ self.description self.locale.description self.locale localeIdentifier return self @end Basically just changed.. DemoApp 214 307 Category's locale __NSCFLocale 0x160550 en_US_POSIX 2011 07 15 16 35 24.338 DemoApp 214 307 Category's object NSDateFormatter 0x160d90 and object's locale __NSCFLocale 0x12be70 en_GB 2011 07 15 16 35 24.345 DemoApp 214 307 dateString..
What do I have to do to get Core Data to automatically migrate models? http://stackoverflow.com/questions/1018155/what-do-i-have-to-do-to-get-core-data-to-automatically-migrate-models you need to add some options to this to tell it to handle auto migrate NSDictionary options NSDictionary dictionaryWithObjectsAndKeys NSNumber numberWithBool YES NSMigratePersistentStoresAutomaticallyOption NSNumber numberWithBool YES NSInferMappingModelAutomaticallyOption.. nil NSError error _persistentStoreCoordinator NSPersistentStoreCoordinator alloc initWithManagedObjectModel self managedObjectModel if _persistentStoreCoordinator addPersistentStoreWithType NSSQLiteStoreType configuration nil.. NSError error _persistentStoreCoordinator NSPersistentStoreCoordinator alloc initWithManagedObjectModel self managedObjectModel if _persistentStoreCoordinator addPersistentStoreWithType NSSQLiteStoreType configuration nil URL storeUrl options..
I keep on getting “save operation failure” after any change on my XCode Data Model http://stackoverflow.com/questions/1091228/i-keep-on-getting-save-operation-failure-after-any-change-on-my-xcode-data-mod with just one string property called evaluationTopic . I had following code for inserting a fresh string void insertNewObject Create a new instance of the entity managed by the fetched results controller. NSManagedObjectContext context fetchedResultsController.. string void insertNewObject Create a new instance of the entity managed by the fetched results controller. NSManagedObjectContext context fetchedResultsController managedObjectContext NSEntityDescription entity fetchedResultsController fetchRequest.. the entity managed by the fetched results controller. NSManagedObjectContext context fetchedResultsController managedObjectContext NSEntityDescription entity fetchedResultsController fetchRequest entity NSManagedObject newManagedObject NSEntityDescription..
http://stackoverflow.com/questions/11983514/how-to-parse-simple-xml its looping and getting all details iphone ipad share improve this question Use the Below Code.Where Table is NSObject Class with the CaseId PartyId CartId as a properties in this class.If you have the xml url just called loadXMLByURL method.. in this class.If you have the xml url just called loadXMLByURL method with URl.After parsing you will get Each Object in TableArray which have the Table object with above properties. NSMutableString currentNodeContent NSXMLParser parser Tweet..
Accessing Method from other Classes Objective-C http://stackoverflow.com/questions/1658433/accessing-method-from-other-classes-objective-c Method from other Classes Objective C Looked for an answer for this question but I haven't found a suitable one yet. I'm hoping you guys and gals can help.. not all the places... I'm not sure how I'd do this which is why I'm asking for help. I'm a little rusty and new for Objective C so pretty examples will help me a lot. Allow me to give you one. File ViewController1.m @implementation ViewController1.. void CommonMethod id sender So some awesome generic stuff... @end I feel like I need to #import the other file make an Object from the class and call the Method from the Object... How do I do that Thanks again iphone objective c class object methods..
insertNewObjectForEntityForName: http://stackoverflow.com/questions/1780929/insertnewobjectforentityforname I set up an Entity using the Xcode .xcdatamodel file editor. I created an entity called Person added a.. it. That all works fine. Now when I go to write a line of code like Person person Person NSEntityDescription insertNewObjectForEntityForName @ Person inManagedObjectContext managedObjectContext And I get Terminating app due to uncaught exception.. write a line of code like Person person Person NSEntityDescription insertNewObjectForEntityForName @ Person inManagedObjectContext managedObjectContext And I get Terminating app due to uncaught exception 'NSInternalInconsistencyException' reason..
iPhone: Download PDF and store locally? http://stackoverflow.com/questions/2226615/iphone-download-pdf-and-store-locally share improve this question I have found one method which i tried my self Get the PDF Data from the url in a NSData Object NSData pdfData NSData alloc initWithContentsOfURL NSURL URLWithString @ http www.msy.com.au Parts PARTS.pdf Store the Data..
Adding C++ Object to Objective-C Class http://stackoverflow.com/questions/2262011/adding-c-object-to-objective-c-class C Object to Objective C Class I'm trying to mix C and Objective C I've made it most of the way but would like to have a single interface.. C Object to Objective C Class I'm trying to mix C and Objective C I've made it most of the way but would like to have a single interface class.. C Object to Objective C Class I'm trying to mix C and Objective C I've made it most of the way but would like to have a single interface class between the Objective C and C code. Therefore..
Difference between [UIImage imageNamed…] and [UIImage imageWithData…]? http://stackoverflow.com/questions/316236/difference-between-uiimage-imagenamed-and-uiimage-imagewithdata 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 see any practical difference though I have only tried in the simulator and not on an iPhone.. done. If you don't have any huge images I wouldn't worry about it. Unless you see a problem and kudos for checking Object Allocation instead of preemptively optimizing I would choose less lines of code over negligible memory improvements. share..
http://stackoverflow.com/questions/459833/which-open-source-licenses-are-compatible-with-the-apples-iphone-and-its-offici any developer program or device that requires extra payments to deploy is in conflict with the LGPL. Distribution of Object Files You must ensure that the terms of the resulting executable allow the recipient to make changes to the LGPL code and..
NSFetchedResultsController custom sort not getting called http://stackoverflow.com/questions/4789782/nsfetchedresultscontroller-custom-sort-not-getting-called alloc init Edit the entity name as appropriate. NSEntityDescription entity NSEntityDescription entityForName @ Object inManagedObjectContext self.managedObjectContext fetchRequest setEntity entity Set the batch size to a suitable number... Edit the entity name as appropriate. NSEntityDescription entity NSEntityDescription entityForName @ Object inManagedObjectContext self.managedObjectContext fetchRequest setEntity entity Set the batch size to a suitable number. fetchRequest setFetchBatchSize.. appropriate. NSEntityDescription entity NSEntityDescription entityForName @ Object inManagedObjectContext self.managedObjectContext fetchRequest setEntity entity Set the batch size to a suitable number. fetchRequest setFetchBatchSize 20 NSSortDescriptor..
What is objc_setAssociatedObject() and in what cases should it be used? http://stackoverflow.com/questions/5909412/what-is-objc-setassociatedobject-and-in-what-cases-should-it-be-used is objc_setAssociatedObject and in what cases should it be used In a project I have taken on the original author has opted to use objc_setAssociatedObject.. in what cases should it be used In a project I have taken on the original author has opted to use objc_setAssociatedObject and I'm not 100 clear what it does or why they decided to use it. I decided to look it up and unfortunately the docs aren't.. it. I decided to look it up and unfortunately the docs aren't very descriptive about its purpose. objc_setAssociatedObject Sets an associated value for a given object using a given key and association policy. void objc_setAssociatedObject id object..
When does an associated object get released? http://stackoverflow.com/questions/6039309/when-does-an-associated-object-get-released does an associated object get released I'm attaching object B via associative reference to object A. Object B observes some properties of object A through KVO. The problem is that object B seems to be deallocated after object A.. zsShowSpinner self.image BOOL showLoadingSpinner ZSPropertyWatcher imageWatcher ZSPropertyWatcher objc_getAssociatedObject self imageWatcherKey return imageWatcher nil void setShowLoadingSpinner BOOL aBool ZSPropertyWatcher imageWatcher nil ZSPropertyWatcher.. imageWatcher nil ZSPropertyWatcher frameWatcher nil if aBool imageWatcher ZSPropertyWatcher alloc initWithObject self keyPath @ image delegate self callback @selector zsImageChanged autorelease frameWatcher ZSPropertyWatcher alloc initWithObject..
RestKit Object Mapping Relationships without KVC http://stackoverflow.com/questions/9318565/restkit-object-mapping-relationships-without-kvc Object Mapping Relationships without KVC After reading the Object Mapping Guide on GitHub for RestKit my problem didn't disappear.. Object Mapping Relationships without KVC After reading the Object Mapping Guide on GitHub for RestKit my problem didn't disappear so perhaps somebody can say if RestKit could deal with the.. RestKit v.10 . Setting up Restkit with objectStore ... Init objectMapping for Class Company companyMapping RKManagedObjectMapping mappingForClass Company class inManagedObjectStore objectStore companyMapping mapKeyPath @ unitID toAttribute @ unitID..
Faster alternative to glReadPixels in iPhone OpenGL ES 2.0 http://stackoverflow.com/questions/9550297/faster-alternative-to-glreadpixels-in-iphone-opengl-es-2-0 I have to perform this operation repeatedly. I have searched the web and found some approach like using Pixel Buffer Object and glMapBuffer but it seems that OpenGL ES 2.0 does not support them. iphone ios opengl es opengl es 2.0 share improve.. is used to set up the pixel buffer input NSDictionary sourcePixelBufferAttributesDictionary NSDictionary dictionaryWithObjectsAndKeys NSNumber numberWithInt kCVPixelFormatType_32BGRA kCVPixelBufferPixelFormatTypeKey NSNumber numberWithInt videoSize.width..
Reading HTML content from a UIWebView http://stackoverflow.com/questions/992348/reading-html-content-from-a-uiwebview @ document.body.innerHTML This will grab the current HTML contents of the view using the Document Object Model parse the Javascript then give it to you as an NSString of HTML. Another way is to do your request programmatically..
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