Question

I am trying to figure out how to select an object first then I am able to move it. For example I want to select cow first by touching it then I am able to move it. The reason being is when I am touching the screen it is moving both cow and cow1. When I only want to move one cow at a time. Any help will be appreciated.

-(void) touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {

    UITouch *touch = [touches anyObject];

    CGPoint touchLocation = [touch locationInView:touch.view];

    cow.center = CGPointMake(touchLocation.x, touchLocation.y);

    cow1.center = CGPointMake(touchLocation.x, touchLocation.y);

}

Answer 1

Try using UIPanGestureRecognizer, like this:

@synthesize myImage; //UIImageView

- (void)viewDidLoad
{
    [super viewDidLoad];
    [self startMoveImage];
}

-(void) startMoveImage{
    UIPanGestureRecognizer *panGestureRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(pan:)];
    [self.view addGestureRecognizer:panGestureRecognizer];
}

- (void)pan:(UIPanGestureRecognizer *)gesture
{
    if ((gesture.state == UIGestureRecognizerStateChanged) ||
        (gesture.state == UIGestureRecognizerStateEnded)) {

        CGPoint position = [gesture locationInView:[myImage superview]];
        [myImage setCenter:position];
    }
}