swift - 类型 'UIImage' 的值没有成员

Question

我收到的错误是:

Value of Type 'UIImage' Has no Member 'thumbnailImage'

我搜索了其他问题和解决方案，但我不明白如何将它们实现到我的代码中。请帮我解决这个问题。

let image = UIImage(data: newProfilePictureData)
let mediumImage: UIImage = image!.thumbnailImage(280, transparentBorder: 0, cornerRadius: 0, interpolationQuality: CGInterpolationQuality.High)
let smallRoundedImage: UIImage = image!.thumbnailImage(64, transparentBorder: 0, cornerRadius: 0, interpolationQuality: CGInterpolationQuality.Low)

Answer 1

这是从原始图像生成缩略图的方法:

func generateThumbImage() -> UIImage{

        let image: UIImage = UIImage(data: newProfilePictureData)
        let thumbSize = CGSizeMake(100, 100)
        UIGraphicsBeginImageContext(thumbSize)
        image.drawInRect(CGRectMake(0, 0, thumbSize.width, thumbSize.height))
        let thumbImage = UIGraphicsGetImageFromCurrentImageContext()
        UIGraphicsEndImageContext()
        return thumbImage
    }