如何快速制作不同形状的图像视图 [英] How to make imageview with different shape in swift

问题描述

我想将普通的 ios imageview 更改为下面的图像形状(如弧)

I want to change the normal ios imageview to this below image shape(Like arc)

推荐答案

您可以使用它来根据您的要求设计形状，您可以在路径中添加额外的线条以防您需要修改贝塞尔路径.创建一个自定义 UIImageView 类并将情节提要中的图像视图子类化为您的自定义类.

You can use this to design the shape as per your requirement, you can add extra lines to the path incase you need to modify the bezier path. Create a custom UIImageView class and subclass the image view in storyboard to your custom class.

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

If you want to add the image through code kindly use it like this

 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

This is the actual image on left hand side and the image after shaping as per your requirement in the simulator on the right hand side

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