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iphone Programming Glossary: singletonWhere to place the “Core Data Stack” in a Cocoa/Cocoa Touch application http://stackoverflow.com/questions/1267520/where-to-place-the-core-data-stack-in-a-cocoa-cocoa-touch-application cocoa cocoa touch core data share improve this question Summary There is no need to create a singleton to manage the Core Data stack indeed doing so is likely to be counter productive. The Core Data stack.. you pass data or a model controller from one view controller to the next. The typical role of the singleton as described here is as a model controller. With Core Data the managed object context is already a model.. is therefore usually a managed object context otherwise a managed object. Using and passing a singleton object that manages a stack and from which you retrieve a context typically at best introduces a needless..
http://stackoverflow.com/questions/1861656/iphone-reachability-checking .h file import Reachability class #import Reachability.h declare Reachability you no longer have a singleton but manage instances Reachability reachability in .m file NSNotificationCenter defaultCenter addObserver..
http://stackoverflow.com/questions/3245733/apple-gyroscope-sample-code one of these managers per application. I recommend making the motionManager accesible through a singleton but thats some extra work which you might not need to do if you only instantiate your class once. Then..
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 while drawing init'ing your NSOperations with a docRef is a bad idea memory wrap the docRef into a singleton. Cancel needless NSOperations When you can especially if they will be using memory beware of leaving..
What's the easiest way to get the current location of an iPhone? http://stackoverflow.com/questions/459355/whats-the-easiest-way-to-get-the-current-location-of-an-iphone it gets the result. iphone core location share improve this question What I do is implement a singleton class to manage updates from core location. To access my current location I do a CLLocation myLocation.. any that are old to prevent the problem of getting stale data from core location. This is the singleton class I wrote. Please note that it is a little rough around the edges #import CoreLocation CoreLocation.h.. @synchronized self NSAssert sharedInstance nil @ Attempted to allocate a second instance of a singleton LocationController. sharedInstance super alloc return sharedInstance id init if self super init self.currentLocation..
Create singleton using GCD's dispatch_once in Objective C http://stackoverflow.com/questions/5720029/create-singleton-using-gcds-dispatch-once-in-objective-c singleton using GCD's dispatch_once in Objective C If you can target iOS 4.0 or above Using GCD is it the best.. in Objective C If you can target iOS 4.0 or above Using GCD is it the best way to create singleton in Objective C thread safe id sharedInstance static dispatch_once_t once static id sharedInstance dispatch_once.. once ^ sharedInstance self alloc init return sharedInstance iphone ios objective c xcode singleton share improve this question This is a perfectly acceptable and thread safe way to create an instance..
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 In case you're always using the same date format s you could also add category methods that return singleton instances with certain configurations something like sharedRFC3339DateFormatter . Be aware however that..
Where to place the “Core Data Stack” in a Cocoa/Cocoa Touch application http://stackoverflow.com/questions/1267520/where-to-place-the-core-data-stack-in-a-cocoa-cocoa-touch-application its own class or do you leave it in the App Delegate iphone cocoa cocoa touch core data share improve this question Summary There is no need to create a singleton to manage the Core Data stack indeed doing so is likely to be counter productive. The Core Data stack happens to be created by the application delegate. Importantly.. . This follows the basic pattern for iPhone all applications you pass data or a model controller from one view controller to the next. The typical role of the singleton as described here is as a model controller. With Core Data the managed object context is already a model controller. It also gives you the ability to access other.. actions. The appropriate unit of currency for a view controller is therefore usually a managed object context otherwise a managed object. Using and passing a singleton object that manages a stack and from which you retrieve a context typically at best introduces a needless level of indirection and at worst introduces unnecessary..
http://stackoverflow.com/questions/1861656/iphone-reachability-checking probably using sample code you found somewhere else. Try in .h file import Reachability class #import Reachability.h declare Reachability you no longer have a singleton but manage instances Reachability reachability in .m file NSNotificationCenter defaultCenter addObserver self selector @selector handleNetworkChange name kReachabilityChangedNotification..
http://stackoverflow.com/questions/3245733/apple-gyroscope-sample-code referenceAttitude According to the docs you should only create one of these managers per application. I recommend making the motionManager accesible through a singleton but thats some extra work which you might not need to do if you only instantiate your class once. Then in your init method you should allocate the motion manager..
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 before CGContextDrawPDFPage to reduce memory usage while drawing init'ing your NSOperations with a docRef is a bad idea memory wrap the 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..
What's the easiest way to get the current location of an iPhone? http://stackoverflow.com/questions/459355/whats-the-easiest-way-to-get-the-current-location-of-an-iphone that just gets the current location once and blocks until it gets the result. iphone core location share improve this question What I do is implement a singleton class to manage updates from core location. To access my current location I do a CLLocation myLocation LocationManager sharedInstance currentLocation If you wanted.. I wrote checks the timestamp on location updates and ignores any that are old to prevent the problem of getting stale data from core location. This is the singleton class I wrote. Please note that it is a little rough around the edges #import CoreLocation CoreLocation.h #import Foundation Foundation.h @interface LocationController.. LocationController alloc init return sharedInstance id alloc @synchronized self NSAssert sharedInstance nil @ Attempted to allocate a second instance of a singleton LocationController. sharedInstance super alloc return sharedInstance id init if self super init self.currentLocation CLLocation alloc init locationManager CLLocationManager..
Create singleton using GCD's dispatch_once in Objective C http://stackoverflow.com/questions/5720029/create-singleton-using-gcds-dispatch-once-in-objective-c singleton using GCD's dispatch_once in Objective C If you can target iOS 4.0 or above Using GCD is it the best way to create singleton in Objective C thread safe id sharedInstance.. singleton using GCD's dispatch_once in Objective C If you can target iOS 4.0 or above Using GCD is it the best way to create singleton in Objective C thread safe id sharedInstance static dispatch_once_t once static id sharedInstance dispatch_once once ^ sharedInstance self alloc init return sharedInstance.. static dispatch_once_t once static id sharedInstance dispatch_once once ^ sharedInstance self alloc init return sharedInstance iphone ios objective c xcode singleton share improve this question This is a perfectly acceptable and thread safe way to create an instance of your class. It may not technically be a singleton in..
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 decides to add such a method in a future version of the OS. In case you're always using the same date format s you could also add category methods that return singleton instances with certain configurations something like sharedRFC3339DateFormatter . Be aware however that NSDateFormatter is not thread safe and you have to use locks..
Optimizing CLLocationManager/CoreLocation to retrieve data points faster on the iPhone http://stackoverflow.com/questions/1081219/optimizing-cllocationmanager-corelocation-to-retrieve-data-points-faster-on-the CLLocationManager on the iPhone also. From different Apps and trial and error this is what I've figured out 1 Use a singleton class for the locationManager ONLY ONE Instance follow the examples in Apple's LocateMe example Tweetero http tweetero.googlecode.com..
Where to place the “Core Data Stack” in a Cocoa/Cocoa Touch application http://stackoverflow.com/questions/1267520/where-to-place-the-core-data-stack-in-a-cocoa-cocoa-touch-application App Delegate iphone cocoa cocoa touch core data share improve this question Summary There is no need to create a singleton to manage the Core Data stack indeed doing so is likely to be counter productive. The Core Data stack happens to be created.. all applications you pass data or a model controller from one view controller to the next. The typical role of the singleton as described here is as a model controller. With Core Data the managed object context is already a model controller. It.. for a view controller is therefore usually a managed object context otherwise a managed object. Using and passing a singleton object that manages a stack and from which you retrieve a context typically at best introduces a needless level of indirection..
http://stackoverflow.com/questions/1861656/iphone-reachability-checking else. Try in .h file import Reachability class #import Reachability.h declare Reachability you no longer have a singleton but manage instances Reachability reachability in .m file NSNotificationCenter defaultCenter addObserver self selector @selector..
http://stackoverflow.com/questions/3245733/apple-gyroscope-sample-code you should only create one of these managers per application. I recommend making the motionManager accesible through a singleton but thats some extra work which you might not need to do if you only instantiate your class once. Then in your init method..
iPhone proper usage of Application Delegate http://stackoverflow.com/questions/338734/iphone-proper-usage-of-application-delegate passes through the app delegate like the menu item for the Preferences Window For everything else you should create a singleton which manages access to them. Jason Coco suggested routing through the Application Controller. In my programs I normally..
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 reduce memory usage while drawing init'ing your NSOperations with a docRef is a bad idea memory wrap the docRef into a singleton. Cancel needless NSOperations When you can especially if they will be using memory beware of leaving contexts open though..
What's the easiest way to get the current location of an iPhone? http://stackoverflow.com/questions/459355/whats-the-easiest-way-to-get-the-current-location-of-an-iphone and blocks until it gets the result. iphone core location share improve this question What I do is implement a singleton class to manage updates from core location. To access my current location I do a CLLocation myLocation LocationManager sharedInstance.. updates and ignores any that are old to prevent the problem of getting stale data from core location. This is the singleton class I wrote. Please note that it is a little rough around the edges #import CoreLocation CoreLocation.h #import Foundation.. sharedInstance id alloc @synchronized self NSAssert sharedInstance nil @ Attempted to allocate a second instance of a singleton LocationController. sharedInstance super alloc return sharedInstance id init if self super init self.currentLocation CLLocation..
NSString retainCount is 2147483647 [duplicate] http://stackoverflow.com/questions/5483357/nsstring-retaincount-is-2147483647 space consuming copy of a constant immutable string and thus returns the already existing constant string. I.e. a singleton. Of a class whose instances are only ever created by the compiler. For which retain release autorelease retainCount are..
Create singleton using GCD's dispatch_once in Objective C http://stackoverflow.com/questions/5720029/create-singleton-using-gcds-dispatch-once-in-objective-c singleton using GCD's dispatch_once in Objective C If you can target iOS 4.0 or above Using GCD is it the best way to create singleton.. using GCD's dispatch_once in Objective C If you can target iOS 4.0 or above Using GCD is it the best way to create singleton in Objective C thread safe id sharedInstance static dispatch_once_t once static id sharedInstance dispatch_once once ^ sharedInstance.. dispatch_once once ^ sharedInstance self alloc init return sharedInstance iphone ios objective c xcode singleton share improve this question This is a perfectly acceptable and thread safe way to create an instance of your class...
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 version of the OS. In case you're always using the same date format s you could also add category methods that return singleton instances with certain configurations something like sharedRFC3339DateFormatter . Be aware however that NSDateFormatter..
Correct Singleton Pattern Objective C (iOS)? http://stackoverflow.com/questions/7598820/correct-singleton-pattern-objective-c-ios Singleton Pattern Objective C iOS I found some information in the net to create a singleton class using GCD. Thats cool because it's thread safe with very low overhead. Sadly I could not find complete solutions but.. and tell me if I've missing something or doing something completely wrong Cheers Stefan iphone objective c ios singleton grand central dispatch share improve this question Keep it simple id sharedInstance static dispatch_once_t pred static.. MyClass alloc init return sharedInstance void dealloc implement dealloc remove abort when refactoring for non singleton use. abort That is it. Overriding retain release retainCount and the rest is just hiding bugs and adding a bunch of lines..
Using AFNetworking and HTTP Basic Authentication http://stackoverflow.com/questions/12440059/using-afnetworking-and-http-basic-authentication serializer AFNetworkActivityIndicatorManager sharedManager setEnabled YES return self #pragma mark Singleton Methods SBAPIManager sharedManager static dispatch_once_t pred static SBAPIManager _sharedManager nil dispatch_once pred.. AFJSONParameterEncoding AFNetworkActivityIndicatorManager sharedManager setEnabled YES return self #pragma mark Singleton Methods SBAPIManager sharedManager static dispatch_once_t pred static SBAPIManager _sharedManager nil dispatch_once pred..
iPhone: How to Pass Data Between Several Viewcontrollers in a Tabbar App http://stackoverflow.com/questions/2363777/iphone-how-to-pass-data-between-several-viewcontrollers-in-a-tabbar-app Kind of data class which holds the data beeing shared between several classes. For more information follow the link Singleton iphone objective c uiviewcontroller uitabbarcontroller share improve this question You need a data model object that..
Singleton shared data source in Objective-C http://stackoverflow.com/questions/355449/singleton-shared-data-source-in-objective-c shared data source in Objective C Hey folks I'm writing a pretty simple iPhone application. The data comes from a plist.. allKeys return self void dealloc searchDict release searchArray release super dealloc static SearchData sharedSingleton NULL SearchData sharedSearchData @synchronized self if sharedSingleton NULL sharedSingleton self alloc init return sharedSingleton.. release super dealloc static SearchData sharedSingleton NULL SearchData sharedSearchData @synchronized self if sharedSingleton NULL sharedSingleton self alloc init return sharedSingleton @end So whenever I try to access the searchDict or searchArray..
What are the key concepts for an iPhone Developer to learn? [closed] http://stackoverflow.com/questions/5677655/what-are-the-key-concepts-for-an-iphone-developer-to-learn and the view . The controller is where your business logic usually goes. Apple has documentation on MVC as well. The Singleton Pattern Singleton classes that's an oxymoron singleton classes are classes which can only have one instance of them in an.. controller is where your business logic usually goes. Apple has documentation on MVC as well. The Singleton Pattern Singleton classes that's an oxymoron singleton classes are classes which can only have one instance of them in an application at a.. that's an oxymoron singleton classes are classes which can only have one instance of them in an application at a time. Singletons are good for factory classes or objects that you won't want two of. The UIDevice class for example is a singleton class...
Using a singleton to create an array accessible by multiple views http://stackoverflow.com/questions/6324732/using-a-singleton-to-create-an-array-accessible-by-multiple-views out though how to access this array of bananas correctly and consistently #import Foundation Foundation.h @interface Singleton NSObject NSMutableArray bananas @property nonatomic retain NSMutableArray bananas @end #import Singleton.h static Singleton.. @interface Singleton NSObject NSMutableArray bananas @property nonatomic retain NSMutableArray bananas @end #import Singleton.h static Singleton mySingleton @implementation Singleton @synthesize bananas #pragma mark SingletonDescption stuff Singleton.. NSObject NSMutableArray bananas @property nonatomic retain NSMutableArray bananas @end #import Singleton.h static Singleton mySingleton @implementation Singleton @synthesize bananas #pragma mark SingletonDescption stuff Singleton mySingleton if..
Correct Singleton Pattern Objective C (iOS)? http://stackoverflow.com/questions/7598820/correct-singleton-pattern-objective-c-ios Singleton Pattern Objective C iOS I found some information in the net to create a singleton class using GCD. Thats cool because it's.. method. So I made my own class using the trial and error method and et voila the following came out @implementation MySingleton MARK MARK Singleton Pattern using GCD id allocWithZone NSZone zone return self sharedInstance retain id copyWithZone NSZone.. own class using the trial and error method and et voila the following came out @implementation MySingleton MARK MARK Singleton Pattern using GCD id allocWithZone NSZone zone return self sharedInstance retain id copyWithZone NSZone zone return self..
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