两个页面之间的跳转

利用一个button事件前往另一个页面

- (IBAction)changeView:(id)sender {

//定义将要前往的第二个视图控制器

WhySecondViewController *second = [[WhySecondViewController alloc]initWithNibName:@"WhySecondViewController" bundle:nil];

//视图跳转

[self presentViewController:second animated:YES completion:nil];

}

返回上一个页面

[self dismissViewControllerAnimated:YES completion:nil];