This tag should be used only on questions that are about Objective-C features or depend on code in the language.
Class extensions @interface Class () are a lot more powerful and can inject variables into the class. Categories @interface Class (Category) …
objective-c objective-c-category class-extensionsHoping somebody can help me out - I would like to replace a certain character in a string and am …
objective-c ios string nsstringI am maintaining an old iOS project which based on SDK 6.0. A method on this project called -(void) showComboBox:(…
ios objective-c uialertcontroller uiactionsheetIn some IBAction I saw: - (IBAction)pushButton:(id)sender; This (id)sender when do I use it?
objective-c ibaction senderWhen using an embedded framework (dyld) in Xcode 6.0.1 with deployment target less that iOS 8 I get: Build is successful Runtime …
objective-c ios8 dylib dynamic-libraryI read much about Core Data.. but what is an efficient way to make a count over an Entity-Type (like …
objective-c core-dataDoes anyone know if UIPopoverPresentationController can be used to present popovers on iPhones? Wondering if Apple added this feature on …
objective-c iphone uipopovercontroller ios8 uipopoverWhen the rootViewController of my application is loaded, I want to be able to check whether or not the users …
iphone objective-c boolean nsuserdefaults modalviewcontrollerI am using the UIImagePickerController to select images for my app. However I am facing some challenges with regards to …
objective-c ios uiimagepickercontroller aspect-ratioIn a seemingly never ending effort to learn more about iphone development, I have been playing around with some of …
iphone objective-c uiview uiswitch