在UIView内部创建的UIButton是scrollview的子级

Question

I am creating UIScrollView on main view, then I am creating UIView which is child of UIScrollView and creating UIButton which is child of UIView .

When I am calling next ViewController on touch up inside event occur,first time it is taking time to load next view controller and second time not.

Flow:-

Main View -> scroll View -> uiview -> uibutton

Answer 1

Below is the solution

in viewDidLoad method of FirstViewController

[subView addSubview:btn];
[scrollView addSubview:subView];
[self.view addSubView:scrollView];

Then Button Action Method

-(IBAction)actionGo:(id)sender
{
  NextViewController *nextVC = [NextViewController alloc]initWithNibName:@"NextViewController" bundle:nil];
  [self.navigationController pushViewController:nextVC animated:YES];    
}

in NextViewController.m

-(IBAction)actionBack:(id)sender
{
  [self.navigationController popViewControllerAnimated:YES];
}

Answer 2

In first time when you run ViewController it unpacked data from XIB/Storyboard. This operation is taking some time. All other times when you call methods on you controller it will be cached and call immediately.