Getting access to _statusBarWindow

AppDelegate.m

//
//  AppDelegate.m
//  StatusBarWindow
//
//  Created by Adam Bell on 7/9/16.
//  Copyright © 2016 Adam Bell. All rights reserved.
//

#import "AppDelegate.h"

#import <objc/runtime.h>

static UIWindow *_statusBarWindow = nil;

@interface UIWindow (StatusBarWindowPls)

- (instancetype)initWithFrame_swizzled:(CGRect)frame;

@end

@implementation UIWindow (StatusBarWindowPls)

- (instancetype)initWithFrame_swizzled:(CGRect)frame
{
  if (!(self = [self initWithFrame_swizzled:frame])) {
    return nil;
  }
  
  // Status Bar Window's Class is UIStatusBarWindow
  if ([NSStringFromClass([self class]) hasPrefix:@"UIS"]) {
    _statusBarWindow = self;
  }
  
  return self;
}

@end

@interface UIApplication (StatusBarWindowPls)

+ (UIWindow *)sharedStatusBarWindow;

@end

@implementation UIApplication (StatusBarWindowPls)

+ (void)load
{
  Method original, swizzled;
  
  original = class_getInstanceMethod([UIWindow class], @selector(initWithFrame:));
  swizzled = class_getInstanceMethod([UIWindow class], @selector(initWithFrame_swizzled:));
  method_exchangeImplementations(original, swizzled);
}

+ (UIWindow *)sharedStatusBarWindow
{
  return _statusBarWindow;
}

@end

@interface AppDelegate ()

@end

@implementation AppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
  // Override point for customization after application launch.
  // Tada.
  NSLog(@"%@", [UIApplication sharedStatusBarWindow]);
  
  return YES;
}

@end


// Output: 2016-07-09 22:53:22.735 StatusBarWindow[19190:1310893] <UIStatusBarWindow: 0x7fd198e49a30; frame = (0 0; 414 736); opaque = NO; gestureRecognizers = <NSArray: 0x7fd198e134d0>; layer = <UIWindowLayer: 0x7fd198e26830>>