iOS开发之获取当前展示的VC

/** 递归查找当前显示的VC*/

+ (UIViewController *)recursiveFindCurrentShowViewControllerFromViewController:(UIViewController *)fromVC

{

if ([fromVC isKindOfClass:[UINavigationController class]]) {

return [self recursiveFindCurrentShowViewControllerFromViewController:[((UINavigationController *)fromVC) visibleViewController]];

} else if ([fromVC isKindOfClass:[UITabBarController class]]) {

return [self recursiveFindCurrentShowViewControllerFromViewController:[((UITabBarController *)fromVC) selectedViewController]];

} else {

if (fromVC.presentedViewController) {

return [self recursiveFindCurrentShowViewControllerFromViewController:fromVC.presentedViewController];

} else {

return fromVC;

}

}

}

/** 查找当前显示的ViewController*/

+ (UIViewController *)getCurrentShowViewController

{

UIViewController *rootVC = [UIApplication sharedApplication].keyWindow.rootViewController;

UIViewController *currentShowVC = [self recursiveFindCurrentShowViewControllerFromViewController:rootVC];

return currentShowVC;

}