Find UIAlertView without having reference to it

I'm writing application tests and want to check if an UIAlertView is currently shown. That means I don't have a pointer to it and I need to know who is the owner of the开发者_Go百科 shown UIAlertView or on which views stack it can be found.

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[UPDATE] Actually the solution below is not working for iOS 7, because the alert views are not bound to a specific window any more. Read here for details: https://stackoverflow.com/a/18703524/942107

Based on KennyTM'm advice in another question Sebastien provided link to, I've created a UIAlertView category with a method returning the UIAlertView if shown to be able to dismiss it programatically.

UIAlertViewAdditions.h:

#import <UIKit/UIKit.h>

@interface UIAlertView (UIAlertViewAdditions)

+ (UIAlertView *) getUIAlertViewIfShown;

@end

UIAlertViewAdditions.m:

#import "UIAlertViewAdditions.h"

@implementation UIAlertView (UIAlertViewAdditions)

+ (UIAlertView *) getUIAlertViewIfShown {
    if ([[[UIApplication sharedApplication] windows] count] == 1) {
        return nil;
    }

    UIWindow *window = [[[UIApplication sharedApplication] windows] objectAtIndex:1];
    if ([window.subviews count] > 0) {
        UIView *view = [window.subviews objectAtIndex:0];
        if ([view isKindOfClass:[UIAlertView class]]) {
            return (UIAlertView *) view;
        }
    }
    return nil;
}

@end