how to add a simple new UIView in a window based application programmatically in iphone?

i want to add a new View Which Contain Anything in a window based application programmatically could someone tell me a step by step process to do this and also how to add controls on that new view programmatically.

i have created a new view and added a label in that now how do i add a button and i want to change the text of label when i clcik on that button? anyone help me?

From stackoverflow

• In most cases you use an ViewController. But it is possible to add an UIView directy to the window. Perhaps you can explain more what you want to do.

  UIView* view = [[UIView alloc] initWithFrame:CGRectMake(0,0,320,480)];
  UILabel* label = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 100, 100)];
  [label setFont:[UIFont boldSystemFontOfSize:18]];
  [label setTextAlignment:UITextAlignmentCenter];
  [label setBackgroundColor:[UIColor clearColor]];
  [label setTextColor:[UIColor whiteColor]];
  [label setText:@"Hello"];
  [view addSubview:label];
  [window addSubView:view];
  

  You can get an referens to the window (if you don't already have one) with

  [[UIApplication sharedApplication] keyWindow];
  

  Rahul Vyas : plz tell me where i write the code. do i need to add a new uiview subclass?

  Alex Reynolds : You would do this in the RootViewController. If you're not used to doing this, you're better off using Interface Builder.

  ullmark : If you want to build an application from scratch with the windowsbased template. I would start by coding a viewcontroller, then build upp the views subviews in the "loadView" function. Then i would add it to the window in the applicationDidFinishLaunching function in the appdelegate... But as Alex says, any reason not to use the IB?

  ullmark : Also, my example was done without taking memory management into account. You would need to call [label release] and [view release]... Just to be clear.