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2014/10/15 ¤U¤È 10:10:41
iphone Programming Glossary: ivarsDeclaration/definition of variables locations in ObjectiveC? http://stackoverflow.com/questions/12632285/declaration-definition-of-variables-locations-in-objectivec interface can define private methods and properties here @end @implementation SampleClass 6 define ivars 7 define methods and synthesize properties from both public and private interfaces @end My understanding.. before. Are there other convenient uses I'm missing My take from working with iOS is that ivars have been alost completely phased out outside of the @synthesize directive and thus can be mostly ignored... your confusion. Especially since recent updates to Xcode and the new LLVM compiler changed the way ivars and properties can be declared. Before modern Objective C in old Obj C 2.0 you didn't have a lot of..
How does Apple know you are using private API? http://stackoverflow.com/questions/2842357/how-does-apple-know-you-are-using-private-api
How to filter NSFetchedResultsController (CoreData) with UISearchDisplayController/UISearchBar http://stackoverflow.com/questions/4471289/how-to-filter-nsfetchedresultscontroller-coredata-with-uisearchdisplaycontroll UISearchBarDelegate NSFetchedResultsControllerDelegate UISearchDisplayDelegate other class ivars required ivars for this example NSFetchedResultsController fetchedResultsController_ NSFetchedResultsController.. NSFetchedResultsControllerDelegate UISearchDisplayDelegate other class ivars required ivars for this example NSFetchedResultsController fetchedResultsController_ NSFetchedResultsController searchFetchedResultsController_..
Property vs. instance variable http://stackoverflow.com/questions/719788/property-vs-instance-variable c cocoa cocoa touch share improve this question Properties are just setters and getters for ivars and should almost always be used instead of direct access. @interface APerson NSObject NSString _name.. setName NSString value value retain _name release _name value It's easy now to distinguish between ivars and getters setters. The accessors have got the self. prefix. You shouldn't access the variables directly..
how to create iphone's wobbling icon effect? http://stackoverflow.com/questions/929364/how-to-create-iphones-wobbling-icon-effect stop methods. In this case it's the wobbling object itself so you don't have to rely on specific ivars and the method can be used for any generic UIView based object i.e. text labels images etc. share..
Declaration/definition of variables locations in ObjectiveC? http://stackoverflow.com/questions/12632285/declaration-definition-of-variables-locations-in-objectivec 4 what goes here @interface SampleClass 5 private interface can define private methods and properties here @end @implementation SampleClass 6 define ivars 7 define methods and synthesize properties from both public and private interfaces @end My understanding of 1 and 4 is that those are C style file based declarations.. seen them used for implementing static variable based singletons before. Are there other convenient uses I'm missing My take from working with iOS is that ivars have been alost completely phased out outside of the @synthesize directive and thus can be mostly ignored. Is that the case Regarding 5 why would I ever want to.. c ios ios5 share improve this question I can understand your confusion. Especially since recent updates to Xcode and the new LLVM compiler changed the way ivars and properties can be declared. Before modern Objective C in old Obj C 2.0 you didn't have a lot of choices. Instance variables used to be declared in the header..
How does Apple know you are using private API? http://stackoverflow.com/questions/2842357/how-does-apple-know-you-are-using-private-api
How to filter NSFetchedResultsController (CoreData) with UISearchDisplayController/UISearchBar http://stackoverflow.com/questions/4471289/how-to-filter-nsfetchedresultscontroller-coredata-with-uisearchdisplaycontroll the header file @interface BlahViewController UITableViewController UISearchBarDelegate NSFetchedResultsControllerDelegate UISearchDisplayDelegate other class ivars required ivars for this example NSFetchedResultsController fetchedResultsController_ NSFetchedResultsController searchFetchedResultsController_ NSManagedObjectContext.. @interface BlahViewController UITableViewController UISearchBarDelegate NSFetchedResultsControllerDelegate UISearchDisplayDelegate other class ivars required ivars for this example NSFetchedResultsController fetchedResultsController_ NSFetchedResultsController searchFetchedResultsController_ NSManagedObjectContext managedObjectContext_..
Property vs. instance variable http://stackoverflow.com/questions/719788/property-vs-instance-variable is undeclared. Why is that the case Thanks. iphone objective c cocoa cocoa touch share improve this question Properties are just setters and getters for ivars and should almost always be used instead of direct access. @interface APerson NSObject NSString _name necessary for legacy runtime @property readwrite NSString.. accurate NSString name return _name copy autorelease void setName NSString value value retain _name release _name value It's easy now to distinguish between ivars and getters setters. The accessors have got the self. prefix. You shouldn't access the variables directly anyway. Your sample code doesn't work as it should be..
how to create iphone's wobbling icon effect? http://stackoverflow.com/questions/929364/how-to-create-iphones-wobbling-icon-effect
Declaration/definition of variables locations in ObjectiveC? http://stackoverflow.com/questions/12632285/declaration-definition-of-variables-locations-in-objectivec 5 private interface can define private methods and properties here @end @implementation SampleClass 6 define ivars 7 define methods and synthesize properties from both public and private interfaces @end My understanding of 1 and 4 is that.. variable based singletons before. Are there other convenient uses I'm missing My take from working with iOS is that ivars have been alost completely phased out outside of the @synthesize directive and thus can be mostly ignored. Is that the case.. I can understand your confusion. Especially since recent updates to Xcode and the new LLVM compiler changed the way ivars and properties can be declared. Before modern Objective C in old Obj C 2.0 you didn't have a lot of choices. Instance variables..
How does Apple know you are using private API? http://stackoverflow.com/questions/2842357/how-does-apple-know-you-are-using-private-api
What exactly does @synthesize do? http://stackoverflow.com/questions/3266467/what-exactly-does-synthesize-do
http://stackoverflow.com/questions/4119117/restrict-mkmapview-scrolling that has the MKMapView . Make sure the map view is initially set to a region where the overlay is visible. add two ivars to the .h... MKMapRect lastGoodMapRect BOOL manuallyChangingMapRect in the .m... void mapView MKMapView mapView regionWillChangeAnimated..
How to filter NSFetchedResultsController (CoreData) with UISearchDisplayController/UISearchBar http://stackoverflow.com/questions/4471289/how-to-filter-nsfetchedresultscontroller-coredata-with-uisearchdisplaycontroll UITableViewController UISearchBarDelegate NSFetchedResultsControllerDelegate UISearchDisplayDelegate other class ivars required ivars for this example NSFetchedResultsController fetchedResultsController_ NSFetchedResultsController searchFetchedResultsController_.. UISearchBarDelegate NSFetchedResultsControllerDelegate UISearchDisplayDelegate other class ivars required ivars for this example NSFetchedResultsController fetchedResultsController_ NSFetchedResultsController searchFetchedResultsController_..
UITextField in UITableViewCell Help http://stackoverflow.com/questions/4568214/uitextfield-in-uitableviewcell-help I have been using a custom UITableViewCell but I'm open to any method. Also is it possible to use the textFields as ivars If any of you could point me in the right direction it would be greatly appreciated. Thank you in advance iphone ipad uitableview..
NSMutableString as retain/copy http://stackoverflow.com/questions/4995254/nsmutablestring-as-retain-copy of course there will be a few exceptions to this where you will need a mutable ivar but it's best to use immutable ivars where possible and where in doubt rather than introducing a ton of threading complexities. in most cases you can remove..
http://stackoverflow.com/questions/6942439/objectivec-ivars-or-property ivars or @property Working on iPhone after a lot of headache and memory problems I just realized from other examples that we.. need to necessarly create @properties for each instance variable we define in header file. And actually I found out ivars easy to just allocate and release it after I use anywhere in the class for @properties I have to use autorealese or I have.. there some reference guidelines I can keep in mind on deciding whether or not to create @property's or just use simple ivars My only problem when using properties is not becuase I am lazy to define it but when I carefully allocate and init them..
Property vs. instance variable http://stackoverflow.com/questions/719788/property-vs-instance-variable iphone objective c cocoa cocoa touch share improve this question Properties are just setters and getters for ivars and should almost always be used instead of direct access. @interface APerson NSObject NSString _name necessary for legacy.. autorelease void setName NSString value value retain _name release _name value It's easy now to distinguish between ivars and getters setters. The accessors have got the self. prefix. You shouldn't access the variables directly anyway. Your sample..
Why is object not dealloc'ed when using ARC + NSZombieEnabled http://stackoverflow.com/questions/8408071/why-is-object-not-dealloced-when-using-arc-nszombieenabled assuming to not see this at all since ARC generates these funky .cxx_destruct methods to dispose of any __strong ivars of a class I was expecting to see this method call dealloc if it's implemented. Apparently setting NSZombieEnabled to YES..
how to create iphone's wobbling icon effect? http://stackoverflow.com/questions/929364/how-to-create-iphones-wobbling-icon-effect anything to the start stop methods. In this case it's the wobbling object itself so you don't have to rely on specific ivars and the method can be used for any generic UIView based object i.e. text labels images etc. share improve this answer..
Internal properties versus ivars http://stackoverflow.com/questions/10469488/internal-properties-versus-ivars
Objective-C Category and new iVar http://stackoverflow.com/questions/10502539/objective-c-category-and-new-ivar the names of all sound files and one to remember which sound is currently playing. However it seems that I cannot add iVars in a category. Instead I tried to use an extension but it seems that they need to be in the original .m file of the class.. soundsInChain objectAtIndex 0 mySound.delegate self mySound play currentSound @end Alternatively I tried to define the iVars as properties which will compile. However I can neither synthesize them nor do I have any other possibility to bind them..
From where to upload app binary file on App store http://stackoverflow.com/questions/10686502/from-where-to-upload-app-binary-file-on-app-store
When to use @property? [duplicate] http://stackoverflow.com/questions/10701645/when-to-use-property objective c ipad properties share improve this question But what purpose do they really serve Access control to iVars and abstraction between representation and underlying data. Are they solely there to be communicated between classes No.. data. Are they solely there to be communicated between classes No they are for when you want to control access to iVars instead of accessing them directly or when you could in the future change underlying data structures but wish to keep the..
How to call a method of another Class? http://stackoverflow.com/questions/3235742/how-to-call-a-method-of-another-class we're done with it super dealloc @end DetailedViewController.h @interface DetailedViewController UITableViewController iVars here Methods and properties here void moveToNextItem @end DetailedViewController.m #import DetailedViewController.h #import..
http://stackoverflow.com/questions/3318499/ivars-with-and-without-self With and Without self I am just curious about the role that self plays within an object. I understand that writing self..
feasible to not declare ivar but use in synthesize? http://stackoverflow.com/questions/8017236/feasible-to-not-declare-ivar-but-use-in-synthesize c share improve this question It's part of the modern runtime and cuts down on the duplication of code declaring iVars and then declaring properties for those iVars. It's handled for you by the @synthesize The modern runtime lets you do other.. of the modern runtime and cuts down on the duplication of code declaring iVars and then declaring properties for those iVars. It's handled for you by the @synthesize The modern runtime lets you do other things that you thought you couldn't do before... The modern runtime lets you do other things that you thought you couldn't do before. For example you can now declare iVars in the .m file as part of a class extension which reduces the amount of information you expose in your public interface...
How do I add a scrollable/zoomable image into the MainView.xib of a Utility Based iPhone Application http://stackoverflow.com/questions/8275234/how-do-i-add-a-scrollable-zoomable-image-into-the-mainview-xib-of-a-utility-base @interface MainViewController UIViewController FlipsideViewControllerDelegate UIScrollViewDelegate Both of these iVars are unnecessary with or without ARC IBOutlet UIScrollView scrollView IBOutlet UIImageView demoImageView You can use 'strong'..
Why is object not dealloc'ed when using ARC + NSZombieEnabled http://stackoverflow.com/questions/8408071/why-is-object-not-dealloced-when-using-arc-nszombieenabled are not great workaround b c they effectively require you to use ARC but code as if you are not using ARC e.g. nil iVars explicitly in dealloc . A specific solution also doesn't help identify when this would be an issue in other controllers..
Best practice when implementing copyWithZone: http://stackoverflow.com/questions/9907154/best-practice-when-implementing-copywithzone allocWithZone zone init or should I use self Class allocWithZone zone init Is it ok to use self month for copying the iVars or should I be accessing the iVars directly i.e. _month iphone objective c cocoa touch copywithzone share improve this.. I use self Class allocWithZone zone init Is it ok to use self month for copying the iVars or should I be accessing the iVars directly i.e. _month iphone objective c cocoa touch copywithzone share improve this question You should always use..
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