This tag should be used only on questions that are about Objective-C features or depend on code in the language.
I want to call a method, pass it the length and have it generate a random alphanumeric string. Are there …
objective-c cocoa string random alphanumericI am migrating a UIViewController class to train a bit with Swift. I am successfully using Objective-C code via the …
objective-c macros swiftWhere on my machine is the iPhone simulator installed? I'm been trying to find where a test application I run …
iphone objective-c ios xcode ios-simulatorI have to carry out a series of download and database write operations in my app. I am using the …
ios objective-c multithreading nsoperation nsoperationqueueHow do I convert (or create) a singleton class that compiles and behaves correctly when using automatic reference counting (ARC) …
objective-c ios singleton automatic-ref-countingWhat formatter is used for boolean values? EDIT: Example: NSLog(@" ??", BOOL_VAL);, what is ?? ?
objective-c string nsstring string-formattingCan anyone point me to any good examples of creating a Custom View Controller as a Container View Controller? The …
objective-c ios uiviewcontroller ios5If I have a UIImage from an imagePicker, how can I save it to a subfolder in the documents directory?
iphone objective-c ios uiimageI have a project that was started in Objective-C, and I am trying to import some Swift code into the …
ios objective-c xcode swift xcode6Now this must be easy, but how can sum two NSNumber? Is like: [one floatValue] + [two floatValue] or exist a …
objective-c math nsnumber