How to use UIBlurEffect with modal View Controllers?

Question

I have a UIViewController that presents another UIViewController modally. I want the modal view controller to have the blur/transparency that iOS 7 int

Answer 1

This is a combination of the above answers.

This works for Interface builder in Xcode 7.2.1 (Swift 2.1.) for iOS 9.2.1.

The code has been tested on the simulator and device.

In Interface Builder:

1. Click the storyboard seque
2. As "Kind" set "Present Modally"
3. As "Presentation" set "Over Current Context" NOTE: Setting the 3.rd step in you viewDidLoadof the presenting UIViewController will not work
4. Dont forget to click your UIViewController and under Custom Class"- Class name it YOUTransparentModalVC (or whatever you want).

In code:

import UIKit

let IMAGE_OVERLAY_NAME = "backgroundColorExample"

class YOUTransparentModalVC: UIViewController
{
    private var backgroundImageOverlayIV:UIImageView!

    override func viewDidLoad()
    {
        super.viewDidLoad()
        self.setupTransparentView()
        self.setupDissmissingVCOnTap()
        self.setupBackgroudImage()
    }

    private func setupTransparentView()
    {
        self.view.backgroundColor       = UIColor.clearColor()
        let effect                      = UIBlurEffect(style: UIBlurEffectStyle.Light)
        let blurView                    = UIVisualEffectView(effect: effect)
        blurView.frame                  = self.view.bounds
        self.view.addSubview(blurView)
    }

    private func setupBackgroudImage()
    {
        self.backgroundImageOverlayIV            = UIImageView(frame: self.view.frame)
        self.backgroundImageOverlayIV.image      = UIImage(named: IMAGE_OVERLAY_NAME)
        self.view.addSubview(self.backgroundImageOverlayIV)
    }

    private func setupDissmissingVCOnTap()
    {
        let tap: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: "dismissVC")
        view.addGestureRecognizer(tap)
    }

    func dismissVC()
    {
        self.dismissViewControllerAnimated(true, completion: nil)
    }


}