- (UIViewController *)getCurrentVC{
UIViewController *result = nil;
UIWindow * window = [[UIApplication sharedApplication] keyWindow];
//app默认windowLevel是UIWindowLevelNormal，如果不是，找到UIWindowLevelNormal的
if (window.windowLevel != UIWindowLevelNormal)
{
NSArray *windows = [[UIApplication sharedApplication] windows];
for(UIWindow * tmpWin in windows)
{
if (tmpWin.windowLevel == UIWindowLevelNormal)
{
window = tmpWin;
break;
}
}
}
id nextResponder = nil;
UIViewController *appRootVC=window.rootViewController;
// 如果是present上来的appRootVC.presentedViewController 不为nil
if (appRootVC.presentedViewController) {
nextResponder = appRootVC.presentedViewController;
}else{
UIView *frontView = [[window subviews] objectAtIndex:0];
nextResponder = [frontView nextResponder]; ///< style="font-family: Arial, Helvetica, sans-serif;">// 这方法下面有详解
}
if ([nextResponder isKindOfClass:[UITabBarController class]]){
UITabBarController * tabbar = (UITabBarController *)nextResponder;
UINavigationController * nav = (UINavigationController *)tabbar.viewControllers[tabbar.selectedIndex];
// UINavigationController * nav = tabbar.selectedViewController ; 上下两种写法都行
result=nav.childViewControllers.lastObject;
}else if ([nextResponder isKindOfClass:[UINavigationController class]]){
UIViewController * nav = (UIViewController *)nextResponder;
result = nav.childViewControllers.lastObject;
}else{
result = nextResponder;
}
return result;
}