How to change the custom class of a view by code

Question

How can I set the class for the same view when I preform a swipe on the view? I have already imported the header files for the classes that I want to change to for example #import "Circuit1.h"

- (IBAction)userSwiped:(UISwipeGestureRecognizer *)sender {
    [self numberOfSwips];

    self.numberOfSwips+=1;
    if (self.numberOfSwips>3){
        self.numberOfSwips=3;
    }
    if (self.numberOfSwips ==1) {
        self.myView.class =super.Circuit1;}
    else if (self.numberOfSwips ==2){
        self.myView.class =super.Circuit2;}
    else if (self.numberOfSwips ==3){
     self.myView.class =super.Circuit3;
    }
    NSLog(@"%f",self.numberOfSwips);
}

It's giving me an error for self.myView.class = super.Circuit1 and the other 2

Answer 1

Changing the class of an Objective-C object at runtime is technically possible, but is a bad idea. See Objective-C: How to change the class of an object at runtime? for a good explanation of why.

However, it is possible to declare a variable of type Class, and use the value stored in it to instantiate an object:

Class customClass = [Circuit1 class];

and then something like this:

[myView removeFromSuperview]; 
myView = [customClass alloc]initWithFrame:frame];
[containerView addSubView:myView]; 

but this would involve recreating the view each time the user swiped. I don't know what exactly your code does, but if the views are complex this is almost certainly the wrong way to go. If you only have 3 subviews, perhaps it would be better to create them as needed, store them in an instance variable array in the viewController, and swap them in and out of the view hierarchy when the user swipes