Ios 试图将图像调整为缩略图，出现错误“0”；未解析标识符的使用“；对于kCGInterpolationHigh

尝试使用以下代码将图像大小调整为缩略图，出现错误：

未解析标识符的使用

对于

kCGInterpolationHigh

@IBAction func dropPhoto(sender: AnyObject) {
    presentViewController(imagePicker, animated: true, completion: nil)
}
func imagePickerController(picker: UIImagePickerController, didFinishPickingImage image: UIImage, editingInfo: [String : AnyObject]?) {
    self.dismissViewControllerAnimated(true, completion: nil)

    let thumbnail = image.resizedImageWithContentMode(UIViewContentMode.ScaleAspectFit, bounds: CGSizeMake(400, 400), interpolationQuality: kCGInterpolationHigh)
    let imgData = UIImagePNGRepresentation(thumbnail)

}
}

---

在iOS 9+中使用

CGInterpolationQuality.High

而不是

kCGInterpolationHigh

参考：