Swift addsubview and remove it

Question

I want to add sub view and remove with one tap. This is my code:

To add subview:

var testView: UIView = UIView(frame: CGRectMake(0, 0, 320, 568))
testView.backgroundColor = UIColor.blueColor()
testView.alpha = 0.5
testView.tag = 100
super.view.userInteractionEnabled = false
self.view.userInteractionEnabled = true
self.view.addSubview(testView)

To remove subview:

override func touchesBegan(touches: NSSet, withEvent event: UIEvent) {
    let touch = touches.anyObject() as UITouch
    let point = touch.locationInView(self.view)
    
    if(testView.tag==100){
        println("Tag 100")
        testView.removeFromSuperview()
    }
    else{
        println("tag not found")
    }
}

But the remove it isn't working

What does "not working" mean? The adding? The removing? Errors? Please edit your question to include more information. — ABMagil, Jan 28 '15 at 16:15
testView is the view with tag 100, not self.view, so your if statement is never executed. — rdelmar, Jan 28 '15 at 16:15

Dasoga · Accepted Answer · 2016-10-03T14:27:51.770

Thanks for help. This is the solution: I created the subview and i add a gesture to remove it

@IBAction func infoView(sender: UIButton) {
    var testView: UIView = UIView(frame: CGRectMake(0, 0, 320, 568))
    testView.backgroundColor = UIColor.blueColor()
    testView.alpha = 0.5
    testView.tag = 100
    testView.userInteractionEnabled = true
    self.view.addSubview(testView)

    let aSelector : Selector = "removeSubview"
    let tapGesture = UITapGestureRecognizer(target:self, action: aSelector)
    testView.addGestureRecognizer(tapGesture)
}

func removeSubview(){
    println("Start remove sibview")
    if let viewWithTag = self.view.viewWithTag(100) {
        viewWithTag.removeFromSuperview()
    }else{
        println("No!")
    }
}

Update:

Swift 3+

@IBAction func infoView(sender: UIButton) {
    let testView: UIView = UIView(frame: CGRect(x: 0, y: 0, width: 320, height: 568))
    testView.backgroundColor = .blue
    testView.alpha = 0.5
    testView.tag = 100
    testView.isUserInteractionEnabled = true
    self.view.addSubview(testView)

    let aSelector : Selector = #selector(GasMapViewController.removeSubview)
    let tapGesture = UITapGestureRecognizer(target:self, action: aSelector)
    testView.addGestureRecognizer(tapGesture)
}

func removeSubview(){
    print("Start remove sibview")
    if let viewWithTag = self.view.viewWithTag(100) {
        viewWithTag.removeFromSuperview()
    }else{
        print("No!")
    }
}

score 86 · Answer 2 · edited Mar 29 '19 at 10:46

86

You have to use the viewWithTag function to find the view with the given tag.

override func touchesBegan(touches: NSSet, withEvent event: UIEvent) {
    let touch = touches.anyObject() as UITouch
    let point = touch.locationInView(self.view)

    if let viewWithTag = self.view.viewWithTag(100) {
        print("Tag 100")
        viewWithTag.removeFromSuperview()
    } else {
        print("tag not found")
    }
}

edited Mar 29 '19 at 10:46

Himanshu padia

7,428
1
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45

answered Jan 28 '15 at 17:16

rakeshbs

24,392
7
73
63

Thanks! actually this solved my problem. But the interaction with de super view it doesn't disable. How can i disable the interaction with the super view? – Dasoga Jan 28 '15 at 17:28
I didn't understand. What interaction with superview? – rakeshbs Jan 28 '15 at 17:30
I have a tap gesture in the first view, after with a button i add a subview, but is just a information view, so, with a tap a i want to remove it. Now it is working the remove tap. But in the first view i receive the same tap, i need to disable that tap... thanks!! – Dasoga Jan 28 '15 at 17:34
Where do you want to tap to remove the information view? Do you want to remove the view when the information view is tapped on the inside and not outside ? – rakeshbs Jan 28 '15 at 17:36
Yes, when the user tap on the information view(second view), i want to remove that view(second view) and show the **first** view again. – Dasoga Jan 28 '15 at 17:48
Add a uitaprecognizer to the information view and use it to remove the view – rakeshbs Jan 28 '15 at 17:49

craft · Answer 3 · 2020-05-28T20:24:46.940

9

Assuming you have access to it via outlets or programmatic code, you can remove it by referencing your view foo and the removeFromSuperview method

foo.removeFromSuperview()

edited May 28 '20 at 20:24

answered Mar 17 '20 at 19:31

craft

2,017
1
21
30

score 9 · Answer 4 · answered Jul 13 '20 at 11:37

I've a view inside my custom CollectionViewCell, and embedding a graph on that view. In order to refresh it, I've to check if there is already a graph placed on that view, remove it and then apply new. Here's the solution

cell.cellView.addSubview(graph)
graph.tag = 10

now, in code block where you want to remove it (in your case gestureRecognizerFunction)

if let removable = cell.cellView.viewWithTag(10){
   removable.removeFromSuperview()
}

to embed it again

cell.cellView.addSubview(graph)
graph.tag = 10

score -11 · Answer 5 · edited Apr 18 '19 at 06:52

-11

Tested this code using XCode 8 and Swift 3

To Add Custom View to SuperView use:

self.view.addSubview(myView)

To Remove Custom View from Superview use:

self.view.willRemoveSubview(myView)

edited Apr 18 '19 at 06:52

Ankur Lahiry

2,253
1
15
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answered May 08 '17 at 10:08

Pravin Kamble

849
8
12

12

willRemoveSubview do not removes subview from the superview. It only tells when subview is about to be removed. – Murat Yasar Jul 07 '17 at 20:51
6

To remove custom view from superview one should use myView.removeFromSuperview() – Yaroslav Bai Jul 27 '17 at 07:01
2

willRemoveSubview do not removes subview from the superview. – Imtee Aug 07 '17 at 01:51

Swift addsubview and remove it

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