Ios 从UIImagePickerControllerReferenceURL访问ext

如何仅访问UIImagePickerControllerReferenceURL的MIME ext部分？这是我在NSLog-（void）imagePickerController:（UIImagePickerController*）PickerWithInfo:（NSDictionary*）信息完成PickingMediaWithInfo时得到的结果

我只想访问MIME类型。当我使用以下方式向我的Web服务器发送图像时：

NSData *imageData = UIImageJPEGRepresentation(_selectedImage, 1.0);

//non-important ASIFormDataRequest set-up
[request setData:imageData withFileName:uniqueString andContentType:@"image/jpeg" forKey:@"photo"];

这幅画乱七八糟。但当我使用：

NSData *imageData = UIImagePNGRepresentation(_selectedImage);

//non-important ASIFormDataRequest set-up
[request setData:imageData withFileName:uniqueString andContentType:@"image/png" forKey:@"photo"];

---

这幅画很好看。但我上传的照片不会全部是PNG格式的。

迪米特里斯对此的回答很有魅力。我现在将继续键入，这样就不会将其降级为一个琐碎的答案，然后自动添加到注释中。

请尝试在下面的代码中从

UIImagePickerControllerReferenceURL中提取
扩展名

NSURL *referenceURL = @"assets-library://asset/asset.PNG?id=F61B754A-705C-4BFB-9965-DE34C7B93A2B&ext=PNG"; //put your reference URL here
NSString *fileExtension = [referenceURL.absoluteString componentsSeparatedByString:@"ext="][1];

要在swift中获取图像扩展，请执行以下操作：

 func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject]) {
            if let pickedImage = info[UIImagePickerControllerOriginalImage] as? UIImage {
                let assetPath = info[UIImagePickerControllerReferenceURL] as! NSURL
                let ext = assetPath.absoluteString.componentsSeparatedByString("ext=")[1]
                 print(ext)
        }
    }

 func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject]) {
            if let pickedImage = info[UIImagePickerControllerOriginalImage] as? UIImage {
                let assetPath = info[UIImagePickerControllerReferenceURL] as! NSURL
                let ext = assetPath.absoluteString.componentsSeparatedByString("ext=")[1]
                 print(ext)
        }
    }