subclass

Im overriding an equals() method and I need to know if the object is an instance of a Event's subclass (Event is the superclass). I want something like "obj subclassof Event". How can this be made? Thanks in advance! instanceof can handle that just fine. Adrian With the following code you can check if an object is a class that extends Event but isn't an Event class instance itself. if(myObject instanceof Event && myObject.getClass() != Event.class) { // then I'm an instance of a subclass of Event, but not Event itself } By default instanceof checks if an object is of the class specified or a

I am trying to subclass WKWebView. When I implement my own initializer, I got this error: 'required' initializer 'init(coder:)' must be provided by subclass of 'WKWebView' Ok, that is well known that we have to implement it for subclasses of UIView. For a direct subclass of UIView it works just implementing it, but with WKWebView it does not seem so simple. I followed the Fix-it hint, and this snippet is added to the code: required @availability(*, unavailable) convenience init!(coder: NSCoder!) { fatalError("init(coder:) has not been implemented") } So I get a class like the following: import

I'm creating a game in which I have a somewhat complex method for creating entities. When a level is loaded, the loading code reads a bunch of YAML files that contain attributes of all the different possible units. Using the YAML file, it creates a so-called EntityResource object. This EntityResource object serves as the authoritative source of information when spawning new units. The goal is twofold: Deter cheating by implementing a hash check on the output of the YAML file Aid in debugging by having all unit information come from a single, authoritative source. These EntityResource objects

This question already has answers here : How can I get a list of all the implementations of an interface programmatically in Java? (11 answers) Find Java classes implementing an interface [duplicate] (9 answers) Can I do it with reflection or something like that? There's no 100% reliable way to do what you want. The reason is because of how class loading works in Java. Classes, in Java, are loaded "on demand". The first time a class is referenced in code (either statically or dynamically), the JVM will use the current class loader and try to load it. A ClassLoader has no method that gives all

I have a Bluetooth foot switch that's basically a wireless keyboard. One pedal sends the up arrow key, the other sends the down arrow key. I want to be able to execute my own code in my iPad app when one of the pedals is pressed. The maker of the pedal tells me I should create a UITextField , and adopt the UIKeyInput protocol in the containing UIView and use the beginningOfDocument and endOfDocument methods to execute my code. I did this, but no matter what I do, none of the UIKeyInput or UITextInput methods get called. Can anyone walk me through this, or direct me to a tutorial on something

I'm trying to create & use a very simple UIView subclass for a rectangle with rounded corners. I've created a new class as follows : RoundedRect.h #import <UIKit/UIKit.h> #import <QuartzCore/QuartzCore.h> @interface RoundedRect : UIView @end RoundedRect.m #import "RoundedRect.h" @implementation RoundedRect - (id)initWithFrame:(CGRect)frame { self = [super initWithFrame:frame]; if (self) { // Initialization code [[self layer] setCornerRadius:10.0f]; [[self layer] setMasksToBounds:YES]; } return self; } @end I'm using iOS 5.1 with storyboards and have set the custom class property in the IB