custom view with ability to show xib in another view

customview.h

#import <UIKit/UIKit.h>

IB_DESIGNABLE
@interface CustomView : UIView

@end

customview.m

- (id)initWithCoder:(NSCoder *)aDecoder {
    self = [super initWithCoder:aDecoder];
    if (self) {
        [self xibSetup];
    }
    return self;
}

- (instancetype)initWithFrame:(CGRect)frame {
    self = [super initWithFrame:frame];
    if (self) {
        [self xibSetup];
    }
    return self;
}

- (void)xibSetup {
#if !TARGET_INTERFACE_BUILDER
    NSBundle *bundle = [NSBundle mainBundle];
#else
    NSBundle *bundle = [NSBundle bundleForClass:[self class]];
#endif
    UIView *view = [[bundle loadNibNamed:NSStringFromClass([self class]) owner:self options:nil] firstObject];
    view.frame = self.layer.bounds;
    view.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
    [self addSubview:view];
}