CODEWITHSUNDEEP
iosswiftuilabel
Hugo75
Hugo75

Reputation: 249

Set darker transparent background to a label on an image

I have an image and a label on it.

To improve readability I would like the transparent background for the label a little bit darker.

Here's an image to figure out what I'm looking for:

enter image description here

Any idea how to perform that? I've already tried with Blur transparency but it's not working.

Upvotes: 2

Views: 2579

Answers (2)

Matt Le Fleur
Matt Le Fleur

Reputation: 2865

You can set the background color and transparency for the label in the following way:

label.backgroundColor = UIColor(red: 0, green: 0, blue: 0, alpha: 0.7)

To make your background darker set the alpha (transparency) to a higher value. Completely opaque is an alpha of 1.0 and completely transparent is an alpha of 0.0. So experiment around a bit with the alpha until you find a value you like.

Of course you can also adjust the red, green and blue values to a value of your liking. An RGB of 0,0,0 will make the darkest option, black, which may be the most useful for you here.

Edit: You can also use the following alternatives to achieve the same effect:

label.backgroundColor = UIColor(white: 0.0, alpha: 0.7)

or

label.backgroundColor = UIColor.blackColor().colorWithAlphaComponent(0.7)

Edit: In Swift 3 this would be:

label.backgroundColor = UIColor.black.withAlphaComponent(0.7)

Upvotes: 3

Paolo Furlan
Paolo Furlan

Reputation: 92

label.backgroundColor = [[UIColor blackColor] colorWithAlphaComponent:0.7]

Upvotes: -1

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