问UIImage.resize (Xcode11)导致的架构arm64的未定义符号

EN

Undefined symbols for architecture arm64
> Symbol: (extension in Swift):Swift.Sequence< where A.Element: Swift.Comparable>.max() -> A.Element?
> Referenced from: (extension in myapp):__C.UIImage.resize(maxDimension: Swift.Double) -> __C.UIImage in UIImage+Resize.o
ld: symbol(s) not found for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

import Foundation

extension UIImage {
    func resize(maxDimension: Double) -> UIImage {
        let maxCG = CGFloat(maxDimension)
        if [self.size.width, self.size.height].max()! < maxCG {
            return self
        }
        let factor = self.size.width > self.size.height ? maxCG / self.size.width :  maxCG / self.size.height
        let canvasSize = CGSize(width: self.size.width * factor, height: self.size.height * factor)
        UIGraphicsBeginImageContextWithOptions(canvasSize, false, self.scale)
        defer { UIGraphicsEndImageContext() }
        self.draw(in: CGRect(origin: .zero, size: canvasSize))
        return UIGraphicsGetImageFromCurrentImageContext()!
    }
}