//获取当前屏幕显示的ViewController
-
(UIViewController *)getCurrentVC
{
UIViewController *result = nil;
//找到当前显示的View
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;
}
}
}
//获取View的ViewController
UIView *frontView = [[window subviews] objectAtIndex:0];
id nextResponder = [frontView nextResponder];if ([nextResponder isKindOfClass:[UIViewController class]])
result = nextResponder;
else
result = window.rootViewController;return result;
}
我们在非视图类中想要随时展示一个view时，需要将被展示的view加到当前view的子视图，或用当前view presentViewController，或pushViewContrller，这些操作都需要获取当前正在显示的ViewController。
