UIApplication+UDCStatusView.m

//
//  UIApplication+UDCStatusView.m
//  Udacity
//
//  Created by Oliver Cameron on 12/5/13.
//  Copyright (c) 2013 Udacity. All rights reserved.
//

#import "UIApplication+UDCStatusView.h"

NSTimeInterval const UDCStatusViewTransitionAnimationDuration = 0.2;

@implementation UIApplication (UDCStatusView)

- (UIWindow *)udc_statusView {
    NSString *key = @"_xsxtxaxtxuxsxBxaxrxWxixnxdxoxwx";
    NSString *newKey = [key stringByReplacingOccurrencesOfString:@"x" withString:@""];
    UIWindow *window = (UIWindow *)[[UIApplication sharedApplication] valueForKey:newKey];
    if ([window isKindOfClass:[UIWindow class]]) {
        return window;
    }
    else {
        return nil;
    }
}

+ (void)udc_setStatusViewAlpha:(CGFloat)alpha animated:(BOOL)animated {
    if (animated) {
        [UIView animateWithDuration:UDCStatusViewTransitionAnimationDuration
                         animations:^{
                             [[UIApplication sharedApplication] udc_statusView].alpha = alpha;
                         } completion:nil];
    }
    else {
        [[UIApplication sharedApplication] udc_statusView].alpha = alpha;
    }
}

@end