This tag should be used only on questions that are about Objective-C features or depend on code in the language.
I am implementing a search field where the user can type in a string to filter the items displayed in …
objective-c cocoa core-dataI was wondering if I could send some webservice calls while my application is in the background. How does skype …
ios objective-c web-services background-processI have an M3U8 file saved locally. I want to download the video file from the above file. I …
ios objective-c m3u8I'm trying to implement the new viewWillTransitionToSize method which has been introduced in iOS 8 (all other rotation methods have been …
ios iphone objective-c ios8In my MainStoryBoard I want to push a viewController to the detailView but I get this error: NSInvalidArgumentException', reason: 'Pushing …
ios objective-c swift uinavigationcontroller storyboardCan someone give an example on how to use NSCache to cache a string? Or anyone has a link to …
ios objective-c xcode cocoa nscacheI want to get the UITouch location of my tap from UIGestureRecognizer, but I can not figure out how to …
ios objective-c xcode cocos2d-iphone uigesturerecognizerI get this cryptic error the first time (and only the first time) my view is loaded due to the …
iphone objective-c cocoa-touchI want to format a UITextField for entering a credit card number into such that it only allows digits to …
ios objective-c swift uitextfield credit-cardIs there a way to view the key/value pairs of a NSDictionary variable through the Xcode debugger? Here's the …
objective-c cocoa xcode debugging