Question

I have a class method where I want to perform this piece of code below. the problem is that in a class method you can’t use something like self.view. so I’m a bit stuck here. I’ve found some stuff about using [self class] but I don’t really understand how to use that in my piece of code.

for (UIView *view in [self.view subviews]) 
    {
        if([view isKindOfClass:[Circle class]]) {

            [UIView animateWithDuration:0.2 delay:0 options:UIViewAnimationCurveLinear animations:^{
                view.alpha = 0;
                view.frame = CGRectMake(self.view.frame.size.width/2-35, self.view.frame.size.height/2-35, 70, 70);
            } completion:nil];

            [view performSelector:@selector(removeFromSuperview) withObject:nil afterDelay:0.4];
        } else {
            //
        }
    }

UPDATE with more info

I have a Circle class.
in that class I have this method

- (IBAction)playerTap:(id)sender {


    NSString *numberString;
    numberString = [NSString stringWithFormat:@"%i",indexNumber+1];

    if (indexNumber < 14)
    {


    if ([label.text isEqualToString:numberString]) 
    {
    [UIView animateWithDuration:0.1 animations:^{


        self.transform = CGAffineTransformMakeScale(1.2, 1.2);

    } completion:^(BOOL finished) {

       [UIView animateWithDuration:0.05 animations:^{
           self.transform = CGAffineTransformIdentity;
           self.alpha = 0.2;

       } completion:nil];

    }];

    ++indexNumber;
    } 
    } else {

        self.alpha = 0.2;

        [NUMViewController gameHasEnded];

    }

}

when the indexNumber (a static variable) has reached a certain amount I want a method in my NUMViewController Class to be performed. I.E. the “gameHasEnded” method.

that would be a method with the code at the beginning of this post. it will remove all other circle instances from the view.

a class method seemed the most logical for me because I’m not performing the method on the circle object but it affects all the objects in my other class.

Answer 1

It is not meaningful to have a class method that calls self.view. The class does not have a view, and there is no way to know which instance you mean. Why are you doing this in a class method? Move it to a the instance. If you have a shared singleton instance, than class methods can refer to it, but this is generally a bad idea and should be avoided if possible (since it ties your class to the singleton).