//获取当前屏幕显示的viewcontroller
- (UIViewController *)getCurrentVC { 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] objectAtIndex:0]; id nextResponder = [frontView nextResponder]; if ([nextResponder isKindOfClass:[UIViewController class]]) result = nextResponder; else result = window.rootViewController; return result; }原文：http://www.cnblogs.com/991526245wang/p/5158088.html