Include in your code to create a fake and consistent status bar to take screenshots with.

SHNFakeStatusBar.m

//
//  SHNFakeStatusBar
//  Created by Shaun Harison on 12/3/13.
//

#import <objc/runtime.h>

#define CARRIER_STRING @"Apple"
#define TIME_STRING @"Timestamp"

@interface SHNFakeStatusBar : NSObject

@end

@implementation SHNFakeStatusBar

+ (void)load {
	Class UIStatusBarTimeItemView = NSClassFromString(@"UIStatusBarTimeItemView");
	
	// iOS 7
	if([UIStatusBarTimeItemView instancesRespondToSelector:NSSelectorFromString(@"imageWithText:")]) {
		Class UIStatusBarTimeItemView = NSClassFromString(@"UIStatusBarTimeItemView");
		Method method = class_getInstanceMethod([self class], @selector(timeViewContentsImage));
		method_exchangeImplementations(method, class_getInstanceMethod(UIStatusBarTimeItemView, NSSelectorFromString(@"contentsImage")));
		
		Class UIStatusBarServiceItemView = NSClassFromString(@"UIStatusBarServiceItemView");
		method = class_getInstanceMethod([self class], @selector(carrierContentsImage));
		method_exchangeImplementations(method, class_getInstanceMethod(UIStatusBarServiceItemView, NSSelectorFromString(@"contentsImage")));
	}
	
	// iOS 6
	else if([UIStatusBarTimeItemView instancesRespondToSelector:NSSelectorFromString(@"contentsImageForStyle:")]) {
		Class UIStatusBarTimeItemView = NSClassFromString(@"UIStatusBarTimeItemView");
		Method method = class_getInstanceMethod([self class], @selector(timeContentsImageForStyle:));
		method_exchangeImplementations(method, class_getInstanceMethod(UIStatusBarTimeItemView, NSSelectorFromString(@"contentsImageForStyle:")));
		
		Class UIStatusBarServiceItemView = NSClassFromString(@"UIStatusBarServiceItemView");
		method = class_getInstanceMethod([self class], @selector(carrierContentsImageForStyle:));
		method_exchangeImplementations(method, class_getInstanceMethod(UIStatusBarServiceItemView, NSSelectorFromString(@"contentsImageForStyle:")));
	}

}

#pragma mark - iOS 7

- (id)timeViewContentsImage {
	return [self imageWithText:TIME_STRING];
}

- (id)carrierContentsImage {
	return [self imageWithText:CARRIER_STRING];
}

// Implemented by UIStatusBarItemView

- (id)imageWithText:(NSString*)text { return nil; }

#pragma mark - iOS 6

- (id)timeContentsImageForStyle:(int)style {
	CGFloat width = ceilf([TIME_STRING sizeWithFont:[self textFont]].width);
	
	[self beginImageContextWithMinimumWidth:width];
	[self drawText:TIME_STRING forStyle:style];
	
	id image = [self imageFromImageContextClippedToWidth:width];
	[self endImageContext];
	
	return image;
}

- (id)carrierContentsImageForStyle:(int)style {
	CGFloat width = ceilf([CARRIER_STRING sizeWithFont:[self textFont]].width);
	
	[self beginImageContextWithMinimumWidth:width];
	[self drawText:CARRIER_STRING forStyle:style];
	
	id image = [self imageFromImageContextClippedToWidth:width];
	[self endImageContext];
	
	return image;
}

// Implemented by UIStatusBarItemView

- (id)imageFromImageContextClippedToWidth:(CGFloat)width { return nil; }
- (void)beginImageContextWithMinimumWidth:(CGFloat)width { }
- (void)endImageContext { }

- (void)drawText:(NSString*)text forStyle:(int)style { }
- (UIFont*)textFont { return nil; }

@end