从视图中调用视图控制器中的方法

Question

I have to invoke a method present in a view controller who's reference is available in the view. When I try to call the method like any other method, for some reason, iPhone just ignores the call. Can somebody explain as to why this happens and also how can I go about invoking this method?

---

In the view I have this method:

-(void) touchesBegan :(NSSet *) touches withEvent:(UIEvent *)event{
NSArray* mySubViews = [self subviews];
for (UITouch *touch in touches) {
    int i = 0;
    for(; i<[mySubViews count]; i++){
        if(CGRectContainsPoint([[mySubViews objectAtIndex:i] frame], [touch locationInView:self])){
            break;
        }
    }
    if(i<[mySubViews count]){
                    // viewController is the reference to the View Controller. 
        [viewController pointToSummary:[touch locationInView:self].y];
        NSLog(@"Helloooooo");
        break;
    }
}

}

Whenever the touches event is triggered, Hellooooo gets printed in the console but the method before that is simply ignored

Answer 1

In the view I have this method:

-(void) touchesBegan :(NSSet *) touches withEvent:(UIEvent *)event{
NSArray* mySubViews = [self subviews];
for (UITouch *touch in touches) {
    int i = 0;
    for(; i<[mySubViews count]; i++){
        if(CGRectContainsPoint([[mySubViews objectAtIndex:i] frame], [touch locationInView:self])){
            break;
        }
    }
    if(i<[mySubViews count]){
                    // viewController is the reference to the View Controller. 
        [viewController pointToSummary:[touch locationInView:self].y];
        NSLog(@"Helloooooo");
        break;
    }
}

}

Whenever the touches event is triggered, Hellooooo gets printed in the console but the method before that is simply ignored

Answer 2

I created a view controller for the view and allowed communication between the view controllers. Perhaps this is part of the MVC protocol.

Answer 3

Check the value of viewController at the point where it is used to make sure its not nil, use the debugger or add NSLog:

[viewController pointToSummary:[touch locationInView:self].y];
NSLog(@"viewController=%@", viewController);
NSLog(@"Helloooooo");