Making view resize to its parent when added with addSubview

Question

I m having a problem when using addSubview   Example code   ParentView  myParentView     ParentView alloc  initWithNibName   ParentView   bundle nil   ChildeView  myChildeView     ChildeView alloc  initWithNibName   ChildeView  bundle nil           parent frame resized with setFrame lets say to x 0  y 0  W 320  H 411    myParentView view  addSubview   myChildeView view      My child when added is bigger then the parent  and does not resize its frame to parent bounds  I can t use  clip subviews  on the parent  and  Autoresize Subviews  seems not to work if the parent frame is not resized again  Is there a property that makes a subview resize automatically to its parent s bounds without using setFrame on every child

User · Answer

that s all you need          childView frame   parentView bounds

User · Answer

Just copy the parent view s frame to the child-view then add it  After that autoresizing will work  Actually you should only copy the size CGRectMake 0  0  parentView frame size width  parentView frame size height   childView frame   CGRectMake 0  0  parentView frame size width  parentView frame size height    parentView addSubview childView

User · Answer

Swift 4 extension using explicit constraints   import UIKit UIView  extension UIView       public func addSubview   subview  UIView  stretchToFit  Bool   false            addSubview subview          if stretchToFit               subview translatesAutoresizingMaskIntoConstraints   false             leftAnchor constraint equalTo  subview leftAnchor  isActive   true             rightAnchor constraint equalTo  subview rightAnchor  isActive   true             topAnchor constraint equalTo  subview topAnchor  isActive   true             bottomAnchor constraint equalTo  subview bottomAnchor  isActive   true                     Usage   parentView addSubview childView     won t resize  default behavior unchanged  parentView addSubview childView  stretchToFit  false     won t resize parentView addSubview childView  stretchToFit  true     will resize

User · Answer

You can always do it in your UIViews -  void didMoveToSuperview method  It will get called when added or removed from your parent  nil when removed   At that point in time just set your size to that of your parent  From that point on the autoresize mask should work properly

User · Answer

Tested in Xcode 9 4  Swift 4  Another way to solve this issue is   You can add   override func layoutSubviews             self frame    self superview  bounds           in subview class

User · Answer

If you aren   t using Auto Layout  have you tried setting the child view   s autoresize mask  Try this   myChildeView autoresizingMask    UIViewAutoresizingFlexibleWidth                                    UIViewAutoresizingFlexibleHeight     Also  you may need to call  myParentView autoresizesSubviews   YES    to get the parent view to resize its subviews automatically when its frame changes   If you   re still seeing the child view drawing outside of the parent view   s frame  there   s a good chance that the parent view is not clipping its contents  To fix that  call  myParentView clipsToBounds   YES

[iphone] Making view resize to its parent when added with addSubview

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