/**

* 获取当前呈现的ViewController

*/

+ (UIViewController *)getCurrentViewController {

UIViewController *result = nil;

UIWindow * window = [[UIApplication sharedApplication] keyWindow];

if (window.windowLevel != UIWindowLevelNormal)

{

NSArray *windows = [[UIApplication sharedApplication] windows];

for(UIWindow * tmpWin in windows)

{

if (tmpWin.windowLevel == UIWindowLevelNormal)

{

window = tmpWin;

break;

}

}

}

UIView *frontView = [[window subviews] firstObject];

UIResponder *nextResponder = [frontView nextResponder];

if ([nextResponder isKindOfClass:[UIViewController class]])

result = (UIViewController *)nextResponder;

else

result = window.rootViewController;

if ([result isKindOfClass:[UITabBarController class]]) {

UITabBarController *tab = (UITabBarController *)result;

if ([tab.selectedViewController isKindOfClass:[UINavigationController class]]) {

UINavigationController *nav = (UINavigationController *)tab.selectedViewController;

return [nav.viewControllers lastObject];

} else {

return tab.selectedViewController;

}

} else if ([result isKindOfClass:[UINavigationController class]]) {

UINavigationController *nav = (UINavigationController *)result;

return [nav.viewControllers lastObject];

} else {

return result;

}

}