Objective-C Class for loading view from xib

NibInstantiableView.h

//
//  NibInstantiableView.h
//  nik-kov.com
//
//  Created by Nik Kov on 23.03.2018.
//  Copyright © 2018 Apple. All rights reserved.
//

#import <UIKit/UIKit.h>

/// Just subclass it and assign the contentView property in xib to the root view of the xib. File owner must be your class type.
IB_DESIGNABLE
@interface NibInstantiableView : UIView
@end

NibInstantiableView.m

//
//  NibInstantiableView.m
//  nik-kov.com
//
//  Created by Nik Kov on 23.03.2018.
//  Copyright © 2018 Apple. All rights reserved.
//

#import "NibInstantiableView.h"

@interface NibInstantiableView()

@property (weak, nonatomic) UIView *contentView;

@end

@implementation NibInstantiableView

- (instancetype)initWithCoder:(NSCoder *)coder
{
    self = [super initWithCoder:coder];
    if (self) [self setup];
    return self;
}

- (instancetype)init
{
    self = [super init];
    if (self) [self setup];
    return self;
}

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

- (void)setup
{
    self.backgroundColor = [UIColor clearColor];
    
    NSBundle *bundle = [NSBundle bundleForClass:[self class]];
    UINib *nib = [UINib nibWithNibName:NSStringFromClass([self class])
                                bundle:bundle];
    UIView *view = [nib instantiateWithOwner:self options:nil][0];

    self.contentView = view;
    self.contentView.frame = self.bounds;
    [self.contentView setAutoresizingMask: UIViewAutoresizingFlexibleWidth |
     UIViewAutoresizingFlexibleHeight];
    self.contentView.translatesAutoresizingMaskIntoConstraints = YES;
    
    [self addSubview:self.contentView];
}

@end