Transparent View Controller

BTOTransparentViewController.h

//
//  BTOTransparentViewController.m
//
//  Created by Brian Olencki on 10/31/17.
//

#import "BTOTransparentViewController.h"

@interface BTOTransparentViewController ()

@end

@implementation BTOTransparentViewController
- (instancetype)init {
    self = [super init];
    if (self) {
        self.providesPresentationContextTransitionStyle = YES;
        self.definesPresentationContext = YES;
        self.view.backgroundColor = [UIColor clearColor];
        self.modalPresentationStyle = UIModalPresentationOverCurrentContext;
    }
    return self
}
@end

BTOTransparentViewController.swift

//
//  BTOTransparentViewController.swift
//
//  Created by Brian Olencki on 10/31/17.
//

import UIKit

class BTOTransparentViewController: UIViewController {
    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
        
        self.providesPresentationContextTransitionStyle = true
        self.definesPresentationContext = true
        self.view.backgroundColor = UIColor.clear
        self.modalPresentationStyle = .overCurrentContext
    }
}