How can I call a method from ViewController?

Question

Is it possible to call a method (written in a Gamescene) from a ViewController in Swift? I read about Protocol, delegate or Inheritance but all tutorials I saw don't show this case.

Thank you for your help.

Answer 1

There's following way you can call a method,

• If a method is in your view controller it self then, you can call it with self, check question for help, How can I call a method in Objective-C?

  [self yourMethodName];

  If its a class method then, [ClassName yourMethodName];

• If your method is from other class, just #import that class like #import "someclass.h" then same, create a object of that class and call, check this for more help, Objective C - Call method from another class

  someclass *obj = [[someclass alloc] init];

  [obj methodName];

  If its a class method then [someclass methodName]; check question for help, calling class methods objective c

• with delegate, if you've self delegate for someclass then in someclass you can call it like this, check question, How do I create delegates in Objective-C?

  if(self.delegate && [self.delegate respondsToSelector(methodName)]) { [self.delegate methodName]; }

  and in your view controller you've to write like this,

  someclass *obj = [[someclass alloc] init]; obj.delegate = self;

  - (void)methodName { //call when delegate calls it. }

• Anothe way is with NSNotificationCenter, see this question for detail help, Send and receive messages through NSNotificationCenter in Objective-C?

Answer 2

try this.

in ViewController class

#import "Gamescene.h"

Gamescene *obj = [[Gamescene alloc] init];

[Gamescene methodName];

and don't forgot to add method name in Gamescene.h file..

in Swift

class SomeClass {
    class func someTypeMethod() {
    // type method implementation goes here
}

}

SomeClass.someTypeMethod()

you can learn here apple Documentation.