摘要：算了，直接给出代码。- (IBAction) switchViews:(id) sender{if (self.yellowViewController.view.superview == nil) {if (self.yellowViewController == nil) {YellowViewController *yellowViewCtrl = [[YellowViewController alloc] initWithNibName:@"YellowView"bundle:nil];self.yellowViewController = yellowViewCt 阅读全文