Instant UIView exporter

UIView+Export.h

#import <UIKit/UIKit.h>

@interface UIView (Export)

- (UIImage *)exportAsImageWithScale:(CGFloat)scale;

@end

UIView+Export.m

#import "UIView+Export.h"
#import <QuartzCore/QuartzCore.h>


@implementation UIView (Export)

- (UIImage *)exportAsImageWithScale:(CGFloat)scale
{
    CGRect bounds = [self exportBounds];
    
    UIGraphicsBeginImageContextWithOptions(bounds.size, NO, scale);
    CGContextRef context = UIGraphicsGetCurrentContext();
    CGContextSaveGState(context);
    CGContextTranslateCTM(context, -bounds.origin.x, -bounds.origin.y);
    [self.layer renderInContext:context];
    CGContextRestoreGState(context);
    UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    
    return image;
}

- (CGRect)exportBounds
{
    CGRect bounds = [self convertRect:self.frame fromView:self.superview];
    
    for (UIView *subview in self.subviews) {
        CGRect subviewBounds = [subview exportBounds];
        CGRect subviewFrame = [subview convertRect:subviewBounds toView:self];
        bounds = CGRectUnion(bounds, subviewFrame);
    }
    
    return bounds;
}

@end