我想将普通的ios图像视图更改为下面的图像形状（如弧线）
您可以使用它来根据您的要求设计形状，您可以向路径添加额外的线条，以防您需要修改贝塞尔曲线路径。创建一个自定义 UIImageView 类，并将故事板中的图像视图子类化为您的自定义类。
import UIKit
class customImageView: UIImageView {
// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
// override func drawRect(rect: CGRect)
// {
//
//
// }
override func setNeedsLayout() {
let path = UIBezierPath()
path.moveToPoint(CGPoint(x: self.frame.size.width/2, y: self.frame.size.height))
path.addLineToPoint(CGPoint(x: self.frame.size.width, y: self.frame.size.height/2))
path.addLineToPoint(CGPoint(x: self.frame.size.width/2, y: 0))
path.addArcWithCenter(CGPoint(x: self.frame.size.width/2, y: self.frame.size.height/2), radius: self.frame.size.width/2, startAngle:-CGFloat(M_PI_2), endAngle: CGFloat(M_PI_2), clockwise: false)
path.moveToPoint(CGPoint(x: self.frame.size.width/2, y: self.frame.size.height))
path.closePath()
UIColor.redColor().setFill()
path.stroke()
path.bezierPathByReversingPath()
let shapeLayer = CAShapeLayer()
shapeLayer.frame = self.bounds
shapeLayer.path = path.CGPath
shapeLayer.fillColor = UIColor.redColor().CGColor
self.layer.mask = shapeLayer;
self.layer.masksToBounds = true;
}
}
如果您想通过代码添加图像，请像这样使用它
func shapeImage()
{
let customImgView = customImageView()
customImgView.image = UIImage(named: "Image")
customImgView.frame = CGRectMake(0, 0, 250, 250)
self.view.addSubview(customImgView)
}
这是左侧的实际图像，右侧是根据您的要求在模拟器中整形后的图像
