How to use UIVisualEffectView to Blur Image?

Could someone give a small example of applying the blur to an image? I've been trying to figure out the code for a while now :( still new at obj c!

The UIVisualEffectView provides a simple abstraction over complex visual effects. Depending on the desired effect, the results may affect content layered behind the view or content added to the view’s contentView.

Apply a UIVisualEffectView to an existing view to apply a blur or vibrancy effect to the exiting view. After you add the UIVisualEffectView to the view hierarchy, add any subviews to the contentView of the UIVisualEffectView. Do not add subviews directly to the UIVisualEffectView itself.

https://developer.apple.com/documentation/uikit/uivisualeffectview#//apple_ref/occ/instp/UIVisualEffectView/contentView

Just put this blur view on the imageView. Here is an example in Objective-C:

UIVisualEffect *blurEffect;
blurEffect = [UIBlurEffect effectWithStyle:UIBlurEffectStyleLight];

UIVisualEffectView *visualEffectView;
visualEffectView = [[UIVisualEffectView alloc] initWithEffect:blurEffect];

visualEffectView.frame = imageView.bounds;
[imageView addSubview:visualEffectView];

and Swift:

var visualEffectView = UIVisualEffectView(effect: UIBlurEffect(style: .Light))    

visualEffectView.frame = imageView.bounds

imageView.addSubview(visualEffectView)

Here is how to use UIVibrancyEffect and UIBlurEffect with UIVisualEffectView

Objective-C:

// Blur effect
UIBlurEffect *blurEffect = [UIBlurEffect effectWithStyle:UIBlurEffectStyleDark];
UIVisualEffectView *blurEffectView = [[UIVisualEffectView alloc] initWithEffect:blurEffect];
[blurEffectView setFrame:self.view.bounds];
[self.view addSubview:blurEffectView];

// Vibrancy effect
UIVibrancyEffect *vibrancyEffect = [UIVibrancyEffect effectForBlurEffect:blurEffect];
UIVisualEffectView *vibrancyEffectView = [[UIVisualEffectView alloc] initWithEffect:vibrancyEffect];
[vibrancyEffectView setFrame:self.view.bounds];

// Label for vibrant text
UILabel *vibrantLabel = [[UILabel alloc] init];
[vibrantLabel setText:@"Vibrant"];
[vibrantLabel setFont:[UIFont systemFontOfSize:72.0f]];
[vibrantLabel sizeToFit];
[vibrantLabel setCenter: self.view.center];

// Add label to the vibrancy view
[[vibrancyEffectView contentView] addSubview:vibrantLabel];

// Add the vibrancy view to the blur view
[[blurEffectView contentView] addSubview:vibrancyEffectView];

Swift:

// Blur Effect
let blurEffect = UIBlurEffect(style: UIBlurEffectStyle.dark)
let blurEffectView = UIVisualEffectView(effect: blurEffect)
blurEffectView.frame = view.bounds
view.addSubview(blurEffectView)

// Vibrancy Effect
let vibrancyEffect = UIVibrancyEffect(blurEffect: blurEffect)
let vibrancyEffectView = UIVisualEffectView(effect: vibrancyEffect)
vibrancyEffectView.frame = view.bounds

// Label for vibrant text
let vibrantLabel = UILabel()
vibrantLabel.text = "Vibrant"
vibrantLabel.font = UIFont.systemFont(ofSize: 72.0)
vibrantLabel.sizeToFit()
vibrantLabel.center = view.center

// Add label to the vibrancy view
vibrancyEffectView.contentView.addSubview(vibrantLabel)

// Add the vibrancy view to the blur view
blurEffectView.contentView.addSubview(vibrancyEffectView)