使用模态视图

下面两个是模态视图两个动画的参数，设置的时候可以写成

self.modalPresentationStyle = 1;
[self presentModalViewController:navSetWireless animated:YES];
//modalTransitionStyle跟modalPresentationStyle相互对应

modalTransitionStyle

      UIModalTransitionStyleCoverVertical

      UIModalTransitionStyleFlipHorizontal

      UIModalTransitionStyleCrossDissolve

      UIModalTransitionStylePartialCurl

modalPresentationStyle

      UIModalPresentationFullScreen

      UIModalPresentationPageSheet

      UIModalPresentationFormSheet

      UIModalPresentationCurrentContext

当一个页面打开一个模态视图后，操作完成时，需要返回之前页面可以用

if ([self respondsToSelector:@selector(presentingViewController)])
 {
      [self.presentingViewController.presentingViewController dismissModalViewControllerAnimated:YES];
 }
else
 {
      [self.parentViewController.parentViewController dismissModalViewControllerAnimated:YES];
}