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 Someone can help me please  Thanks

User · Answer

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

User · Answer

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

User · Answer

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

User · Answer

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

User · Answer

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

[ios] Swift addsubview and remove it

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