ios - 检查图像大小时出现内存问题

Question

我正在尝试获取通过 UIImagePicker 选取的图像的大小

这是代码:

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {

    let image = info[UIImagePickerControllerOriginalImage] as! UIImage 
    var imgData: NSData = NSData(data: UIImageJPEGRepresentation((image), 1)!)
    var imageSize: Int = imgData.length
    print("size of image in KB: %f ", Double(imageSize) / 1024.0)
}

这会引发错误:

Message from Debugger: Terminated due to Memory issue.

注意:磁盘上的图像文件大小约为 75 MB。对于较小尺寸的图像，它工作得很好。

Answer 1

您可以使用FileManager来检查文件大小(和其他属性)。要获取所选图像的 URL，有一个 UIImagePickerControllerOriginalImage 键。它为您提供文件的 URL，您可以将其传递给 FileManager，如下所示:

if let imgURL : URL = info[UIImagePickerControllerOriginalImage] as? URL,
let attribs = try? FileManager.default.attributesOfItem(atPath: imgURL.path) {
    let size = attribs[FileAttributeKey.size]
    print(size)
}