在TestViewController1中弹出TestViewController2

 在TestViewController中点击按钮或者什么触发方法里面写入以下代码

TestViewController2 *test2 = [[TestViewController alloc] init];

UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:test2];

[nav setModalPresentationStyle:UIodalPresentationPageSheet];

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