ios - showViewController has long delay -

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i using following code create segue between 2 view controllers:

nsstring * storyboardname = @"main"; uistoryboard *storyboard = [uistoryboard storyboardwithname:storyboardname bundle: nil]; uiviewcontroller * vc = [storyboard instantiateviewcontrollerwithidentifier:@"secondpage"]; [self showviewcontroller:vc sender:self];

the issue i'm having there's long delay before view shown. don't have happening in viewdidload or viewwillappear, causing delay?


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