How to animate the width and height of a UIView in Xcode?

Question

I have this subview I want to add to my main view, but make it expand from the origin. I read some of the Apple documentation but I don\'t understand where I am making mistake.

Answer 1

Try this:

customView.frame= CGRectMake(self.view.frame.origin.x +5,self.view.frame.origin.y+5,0, 150);
[self.view addSubview:customView];
CGRect frame = customView.frame;
frame.size.width = 310;
[UIView animateWithDuration:0.4
 animations:^{
  customView.frame= frame; 
 }];

Or if you want to use beginAnimation method instead of block Methos , Use this :

UIView *customView=[[UIView alloc]initWithFrame:CGRectMake(self.view.frame.origin.x +5,self.view.frame.origin.y+5,0, 150)];
[self.view addSubview:customView];
CGRect frame = customView.frame;
frame.size.width = 310;
[UIView beginAnimations:@"animateAddContentView" context:nil];
[UIView setAnimationDuration:0.4];
customView.frame= frame;
[UIView commitAnimations];