(Swift)将平移和缩放限制为特定大小的图像

import UIKit

func scaleAndLimitImageSize(image: UIImage, maxSize: CGSize) -> UIImage? {
    let scale = min(maxSize.width / image.size.width, maxSize.height / image.size.height)
    let newSize = CGSize(width: image.size.width * scale, height: image.size.height * scale)
    
    UIGraphicsBeginImageContextWithOptions(newSize, false, 0.0)
    image.draw(in: CGRect(origin: .zero, size: newSize))
    let newImage = UIGraphicsGetImageFromCurrentImageContext()
    UIGraphicsEndImageContext()
    
    return newImage
}

// 使用示例
let originalImage = UIImage(named: "example.jpg")
let maxSize = CGSize(width: 200, height: 200)
let scaledImage = scaleAndLimitImageSize(image: originalImage, maxSize: maxSize)