Question

I have created a method for example changeColor for calling the method we use

[self changeColor];

but how can I cancel these method ?

Edited :
here is my code I have several buttons which they add some image to the image view

- (void) setImagesFrame1 {


        NSMutableArray *imageArray = [[NSMutableArray alloc]initWithCapacity:12];
        for (int i = 0; i <= 12; i++) {
        NSString *fileName = [NSString stringWithFormat:@"a%d.png",i];
        UIImage *j = [UIImage imageNamed:fileName];
        UIImageView *tempImage = [[UIImageView alloc]initWithImage:j];
        [imageArray addObject:tempImage];
        [self createPageWithImage:tempImage forPage:i];

    }


}


- (void) setImagesFrame2 {


        NSMutableArray *imageArray = [[NSMutableArray alloc]initWithCapacity:12];
        for (int i = 0; i <= 12; i++) {
        NSString *fileName = [NSString stringWithFormat:@"s%d.png",i];
        UIImage *j = [UIImage imageNamed:fileName];
        UIImageView *tempImage = [[UIImageView alloc]initWithImage:j];
        [imageArray addObject:tempImage];
        [self createPageWithImage:tempImage forPage:i];

    }


}

and so on …

I call my methods with this action :

- (IBAction)openFrames:(UIButton *)sender {


    [captureView addSubview:framesPreviewView];
    [framesPreviewView sendSubviewToBack:captureView];
    framesPreviewView.frame = CGRectMake(img.bounds.origin.x, img.bounds.origin.y, img.bounds.size.width,  img.bounds.size.height);

        //buttons 
    if (sender == frame1) { [self setImagesFrame1];   }
    if (sender == frame2) {  NSLog(@"frame2"); }
    if (sender == frame3) { [self setImagesFrame3]; NSLog(@"frame3"); }


}

when I press frame1 button the images will be added to my view , the problem is when I press frame2 button the images of this method also add to my view I need avoid this situation , it means when I touch every button the methods of other button should be canceled

Answer 1

The last view on your subview array will be the image, You should use the method [view removeFrom superView];
However, to do that you need to use fast enumeration(for-In loop) over the subviews array.
If you want to be completely sure , you can check the retuned object, if it belongs to UIImageView Class. Then you should execute remaining statements in you setImages method.

Example: `
UIView *tempView;

           for(tempView in self.subviews) {

           if([tempView isKindOfClass:[UIImageView class] ]){
            [tempView removeFromSuperView];

          }
       }

`