web-dev-qa-db-ja.com

アスペクトフィットモードの角が丸いUIImageViewを設定する方法

私は通常、次のコードを使用して角を丸く設定します。

imageView.layer.cornerRadius = 10

ImageViewがAspect Fillに設定されている場合に機能します。

ただし、imageViewがアスペクトフィットモードに設定されている場合、imageViewと画像の比率は異なります。丸みを帯びた角の効果はわかりません。

enter image description here

角が丸いことを示すために、背景色が緑に設定されています。

「実際の画像部分」を丸みを帯びた角に設定する方法はありますか？.

ご回答ありがとうございます。

iosobjective-cswiftrounded-cornerscornerradius
19
cowbjt

この拡張機能をUIImageViewに使用します。

extension UIImageView
{
    func roundCornersForAspectFit(radius: CGFloat)
    {
        if let image = self.image {

            //calculate drawingRect
            let boundsScale = self.bounds.size.width / self.bounds.size.height
            let imageScale = image.size.width / image.size.height

            var drawingRect: CGRect = self.bounds

            if boundsScale > imageScale {
                drawingRect.size.width =  drawingRect.size.height * imageScale
                drawingRect.Origin.x = (self.bounds.size.width - drawingRect.size.width) / 2
            } else {
                drawingRect.size.height = drawingRect.size.width / imageScale
                drawingRect.Origin.y = (self.bounds.size.height - drawingRect.size.height) / 2
            }
            let path = UIBezierPath(roundedRect: drawingRect, cornerRadius: radius)
            let mask = CAShapeLayer()
            mask.path = path.cgPath
            self.layer.mask = mask
        }
    }
}

Without calling this function

After calling this extension method

36
Arun Ammannaya

役立つ、受け入れられた答えのSwift 3バージョンはこちらです！

extension UIImageView {
func roundCornersForAspectFit(radius: CGFloat)
{
    if let image = self.image {

        //calculate drawingRect
        let boundsScale = self.bounds.size.width / self.bounds.size.height
        let imageScale = image.size.width / image.size.height

        var drawingRect : CGRect = self.bounds

        if boundsScale > imageScale {
            drawingRect.size.width =  drawingRect.size.height * imageScale
            drawingRect.Origin.x = (self.bounds.size.width - drawingRect.size.width) / 2
        }else {
            drawingRect.size.height = drawingRect.size.width / imageScale
            drawingRect.Origin.y = (self.bounds.size.height - drawingRect.size.height) / 2
        }
        let path = UIBezierPath(roundedRect: drawingRect, cornerRadius: radius)
        let mask = CAShapeLayer()
        mask.path = path.cgPath
        self.layer.mask = mask
        }
    }
}
5
amagain

これを試してみてください：

import UIKit


class ViewController: UIViewController{

    @IBOutlet weak var myImageView: UIImageView!

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.

        myImageView.contentMode = UIViewContentMode.ScaleAspectFit
        myImageView.clipsToBounds = true
        //myImageView.layer.cornerRadius = 10.0
        myImageView.layer.masksToBounds = true

        let simpleImage = UIImage(named:"ipad5_einladung.jpg")
        let corneredImage = generateRoundCornerImage(simpleImage!, radius: 10)

        //Set cornered Image
        myImageView.image = corneredImage;

    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }


    func generateRoundCornerImage(image : UIImage , radius : CGFloat) -> UIImage {

        let imageLayer = CALayer()
        imageLayer.frame = CGRectMake(0, 0, image.size.width, image.size.height)
        imageLayer.contents = image.CGImage
        imageLayer.masksToBounds = true
        imageLayer.cornerRadius = radius

        UIGraphicsBeginImageContext(image.size)
        imageLayer.renderInContext(UIGraphicsGetCurrentContext())
        let roundedImage = UIGraphicsGetImageFromCurrentImageContext()
        UIGraphicsEndImageContext()

        return roundedImage
    }

}
2
technerd

まず、幅と高さを同じ値に設定する必要があります。次に、画像のプロパティを次のように設定します。

imgProfile_Pic.layer.cornerRadius = cell.imgProfile_Pic.frame.size.height / 2
imgProfile_Pic.layer.borderWidth = 3.0
imgProfile_Pic.layer.borderColor = UIColor.white.cgColor
imgProfile_Pic.clipsToBounds = true
imgProfile_Pic.layoutIfNeeded()
2
Dipak Chhag

これは、Objective-Cに変換された承認済みの回答です。

@implementation UIImageView(Utils)

- (void)roundCornersForAspectFitWithRadius:(CGFloat)cornerRadius {
    if (self.image) {
        double boundsScale = self.bounds.size.width / self.bounds.size.height;
        double imageScale = self.image.size.width / self.image.size.height;

        CGRect drawingRect = self.bounds;

        if (boundsScale > imageScale) {
            drawingRect.size.width = drawingRect.size.height * imageScale;
            drawingRect.Origin.x = (self.bounds.size.width - drawingRect.size.width) / 2;
        }
        else {
            drawingRect.size.height = drawingRect.size.width / imageScale;
            drawingRect.Origin.y = (self.bounds.size.height - drawingRect.size.height) / 2;
        }
        UIBezierPath *path = [UIBezierPath bezierPathWithRoundedRect:drawingRect cornerRadius:cornerRadius];
        CAShapeLayer *mask = [CAShapeLayer new];
        [mask setPath:path.CGPath];
        [self.layer setMask:mask];
    }
}

@end
1
OffensivelyBad