How to set opacity of ImageView layer border-CodePudding

How to set profile Border opacity ?

How to set transparent for having opacity of border color with .white of 50% opacity.

profileView.layer.borderWidth = 3.0
profileView.layer.borderColor = UIColor.white.cgColor

CodePudding user response：

Use withAlphaComponent:

profileView.layer.borderColor = UIColor.white.withAlphaComponent(0.5).cgColor

or:

profileView.layer.borderColor = UIColor.white.cgColor.copy(alpha: 0.5)

Obviously you can choose whatever alpha value you want in the range 0.0 to 1.0.

Or in this case you can use:

profileView.layer.borderColor = UIColor(white: 1.0, alpha: 0.5).cgColor

CodePudding user response：

To set the opacity of a border on an ImageView in Swift, you can use the alpha property of the CALayer that is associated with the ImageView. Here's an example:

let imageView = UIImageView()

// set the border color and width
imageView.layer.borderColor = UIColor.black.cgColor
imageView.layer.borderWidth = 2

// set the border opacity
imageView.layer.borderColor = imageView.layer.borderColor?.withAlphaComponent(0.5)

In the code above, we first set the border color and width for the ImageView, then we set the opacity by using the withAlphaComponent(_:) method of UIColor to create a new color with the desired opacity. The alpha value should be a number between 0 (fully transparent) and 1 (fully opaque).

CodePudding user response：

for alternative you can add UIView behind and set it as border of you ImageView, it's easier to set the oppacity