答案 0 :(得分:0)
You can try with following code:
class func addGradientInView(_ view : UIImageView , Color1 : UIColor , color2 : UIColor , cornerRadius : CGFloat, width : CGFloat) -> CAGradientLayer
{
view.layer.cornerRadius = cornerRadius
view.layer.masksToBounds = true
view.layer.layoutSublayers()
let labelGradient: CAGradientLayer = CAGradientLayer()
labelGradient.masksToBounds = true
labelGradient.frame = view.bounds
labelGradient.frame.size.width = width
labelGradient.frame.size.height = width
labelGradient.colors = [(Color1.cgColor as AnyObject), (color2.cgColor as AnyObject)]
view.layer.insertSublayer(labelGradient, at: 0)
return labelGradient
}
To call the above method:
addGradientInView(icon_Veges, Color1: darkGray_MaxAlpha,
color2:darkGray_MinAlpha,
cornerRadius: 0.0,
width:width)
Suppose: let darkGray_MaxAlpha = UIColor(red: 255/255.0, green: 255/255.0, blue: 255/255.0, alpha: 0.1)
let darkGray_MinAlpha = UIColor(red: 0.0/255.0, green: 0.0/255.0, blue: 0.0/255.0, alpha: 0.6)
Note: Put view, color 1, color 2, width according to your need.
答案 1 :(得分:0)
创建一个UIView并查看您想要的项目,如名称,地点等。
然后初始化CAGradientLayer的对象并设置颜色,位置和框架。然后将对象子层化为UIView。
以下是我建议的代码段。
let gradient = CAGradientLayer()
gradient.colors = [UIColor.blackColor().colorWithAlphaComponent(0).CGColor,UIColor.blackColor().colorWithAlphaComponent(0.3).CGColor]
gradient.locations = [0.1,1.0]
gradient.frame = gradientView.bounds
gradientView.layer.addSublayer(gradient)