现在我的代码显示这样的图像
如果我可以将图像顺时针旋转 90 度，那就可以了。我该怎么做呢。下面列出了代码。我为此删除了一些不必要的代码行。
import UIKit
class ViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate {
var screenView: UIImageView!
var image1 = UIImage(named: "w")
func cropImageIntoQuarterSquare(image: UIImage) -> UIImage? {
//shape of mask
let image = photoDispaly.image
let maskingImage = UIImage(named: "mask5")
//where the masking code starts
photoDispaly.image = maskImage(image: image!, mask: maskingImage!)
photoDispaly.autoresizingMask = [.flexibleWidth, .flexibleHeight, .flexibleBottomMargin, .flexibleRightMargin, .flexibleLeftMargin, .flexibleTopMargin]
photoDispaly.contentMode = .scaleAspectFit // OR .scaleAspectFill
photoDispaly.clipsToBounds = true
let originalImageSize: CGSize = image!.size
let smallImageSize = CGSize(width: (originalImageSize.width + 40), height: (originalImageSize.height + 40))
UIGraphicsBeginImageContext(smallImageSize)
image?.draw(at: CGPoint.zero)
let imageResult = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
return imageResult
}
@IBOutlet var photoDispaly: UIImageView!
func maskImage(image:UIImage, mask:(UIImage))->UIImage{
let imageReference = image.cgImage
let maskReference = mask.cgImage
let imageMask = CGImage(maskWidth: maskReference!.width,
height: maskReference!.height,
bitsPerComponent: maskReference!.bitsPerComponent,
bitsPerPixel: maskReference!.bitsPerPixel,
bytesPerRow: maskReference!.bytesPerRow,
provider: maskReference!.dataProvider!, decode: nil, shouldInterpolate: true)
let maskedReference = imageReference!.masking(imageMask!)
let maskedImage = UIImage(cgImage:maskedReference!)
return maskedImage
}
func image(_ image: UIImage, didFinishSavingWithError error: Error?, contextInfo: UnsafeRawPointer) {
if let error = error {
return
} else {
return
}
}
最佳答案
您可以在 ViewDidLoad 函数中对 UIImageView 运行转换
photoDispaly.transform = CGAffineTransform(rotationAngle: M_PI/4)
您也可能想将 Dispaly 重命名为 Display ;)
关于ios - 如何旋转蒙版图像？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/43217792/