How to load a UIView subclass from a nib using designated initializers in Swift

AView.swift

//
//  AView.swift
//  LoadViewFromNib
//
//  Created by Rob Nadin on 27/01/2015.
//  Copyright (c) 2015 Rob Nadin. All rights reserved.
//

import UIKit

class AView: NibView {

    override convenience init() {
        self.init(frame: .zeroRect)
    }
    
    override init(frame: CGRect) {
        super.init(nib: UINib(nibName: "AView", bundle: nil))
    }
    
    required init(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
    }
    
}

NibView.h

//
//  NibView.h
//  LoadViewFromNib
//
//  Created by Rob Nadin on 27/01/2015.
//  Copyright (c) 2015 Rob Nadin. All rights reserved.
//

#import <UIKit/UIKit.h>

@interface NibView : UIView

- (instancetype)initWithNib:(UINib *)nib;

@end

NibView.m

//
//  NibView.m
//  LoadViewFromNib
//
//  Created by Rob Nadin on 27/01/2015.
//  Copyright (c) 2015 Rob Nadin. All rights reserved.
//

#import "NibView.h"

@implementation NibView

- (instancetype)initWithNib:(UINib *)nib
{
    if (!nib) nib = [UINib nibWithNibName:NSStringFromClass([self class]) bundle:nil];
    self = [[nib instantiateWithOwner:nil options:nil] firstObject];
    return self;
}

@end