Remove SubView Faster

Question

In my main UIViewController embed in UINavigationController I have add an UILabel to a navigationBar using that code:

    if let navigationBar = self.navigationController?.navigationBar {

        let frameDomanda = CGRect(x: navigationBar.frame.width/2 - domandaN.frame.width/2, y: -10, width: domandaN.frame.width, height: navigationBar.frame.height)

        domandaN.frame = frameDomanda
        let secondLabel = UILabel(frame: secondFrame)
        secondLabel.text = "Second"

        navigationBar.addSubview(domandaN)
    }

But when I change Controller the UILabel is fixed. It doesn't disappear so I've added that code:

override func viewDidDisappear(animated: Bool) {
    domandaN.removeFromSuperview()
}

It works but I want it to disappear immediately after the press of the back button. Not like this image: (The "example" text goes away later)

Try to set that code in the `viewWillDisappear`instead and see if it makes any difference. — Rashwan L, Jan 19 '16 at 19:15

score 0 · Answer 1 · answered Jan 19 '16 at 19:19

0

You can use viewWillDisappear, and don't forget to call super:

- (void)viewWillDisappear:(BOOL)animated {
    [super viewWillDisappear:animated];
    // you code here
}

answered Jan 19 '16 at 19:19

shpasta

1,913
15
21

Whats the difference if I don't write super.viewWillDisappear(animated) ? – Jan 19 '16 at 19:21

score 0 · Accepted Answer · answered Jan 19 '16 at 19:22

0

Just add it in viewWillDisappear instead this:

override func viewWillDisappear(animated: Bool) {
    domandaN.removeFromSuperview()
}

For the animation parameter:

If true, the disappearance of the view is being animated.

answered Jan 19 '16 at 19:22

Rashwan L

38,237
7
103
107

in viewWillDisappear the parameter animated doesn't exist – Jan 19 '16 at 21:34
@Sarita check the [reference](https://developer.apple.com/library/ios/documentation/UIKit/Reference/UIViewController_Class/#//apple_ref/occ/instm/UIViewController/viewWillDisappear:). `func viewWillDisappear(_ animated: Bool)`. – Rashwan L Jan 19 '16 at 21:37

Remove SubView Faster

2 Answers2