Question

我正在尝试（和FAILING）让用户上传图像，然后将图像名称和实际图像传递给另一个控制器。在ios11之前，这在模拟器和实际设备上运行良好。但现在，它只能在模拟器上工作，并且每次都会在实际设备上崩溃。我正在使用TestFlight来测试这个，所以我无法看到设备上的错误。但是我看到this并且能够创建我的方法，如下所示：

@objc func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
    let chosenImage = info[UIImagePickerControllerOriginalImage] as! UIImage
    if #available(iOS 9.0, *) {
        let url = info[UIImagePickerControllerReferenceURL] as! URL
        //let assets = PHAsset.fetchAssets(withALAssetURLs: [url], options: nil)
        //imageName = PHAssetResource.assetResources(for: assets.firstObject!).first!.originalFilename
        let result = PHAsset.fetchAssets(withALAssetURLs: [url], options: nil)
        imageName = PHAssetResource.assetResources(for: result.firstObject!).first!.originalFilename
//            let asset = result.firstObject
//            if(asset == nil){
//                print("asset is NIL")
//            }else {
//                print("asset is not NIL")
//            }
//            print(asset?.value(forKey: "filename"))
//            iconImageName = asset?.value(forKey: "filename") as! String
        print("FILENAME START")
        print(iconImageName)
        print("FILENAME END")
        } else {
        // Fallback on earlier versions
    }

    self.dismiss(animated: true, completion: { () -> Void in
    })
}

注释掉的代码是我尝试获取文件名的其他方法。为什么这可以在模拟器上工作，但不能在真实设备上工作？我看过网上但这似乎是正确的方式，除非它不是。 PS：很长的故事，但连接到我的Mac时我的设备无法正常工作，这就是我使用TestFlight的原因。

Answer 1

我相信您可以从信息词典中获取图像路径（并从那里轻松获取文件名）： info[UIImagePickerControllerImageURL]

Answer 2

您可以通过以下方式轻松地从UIImagePicker获取fileName：

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
    if let imageURL = info[UIImagePickerControllerReferenceURL] as? URL {
        let result = PHAsset.fetchAssets(withALAssetURLs: [imageURL], options: nil)
        let asset = result.firstObject
        print(asset?.value(forKey: "filename"))

    }

    dismiss(animated: true, completion: nil)
}

有关详细信息，请参阅以下答案：https://stackoverflow.com/a/40628457/5167909

Answer 3

试试这个：

PHAsset *asset = [self assetFromDictionary:info];
if (asset) {
    NSData *fileData = nil;
    NSString *fileName = [self filenameForAsset:asset];
}

- (PHAsset *)assetFromDictionary:(NSDictionary *)info {
    PHAsset *asset = nil;

    if (@available(iOS 11.0, *)) {
        NSURL *assetURL = info[UIImagePickerControllerImageURL];
        if (assetURL) {
            asset = [info valueForKey:UIImagePickerControllerPHAsset];
        }
    } else {
        NSURL *assetURL = info[UIImagePickerControllerReferenceURL];
        if (assetURL) {
            asset = [[PHAsset fetchAssetsWithALAssetURLs:@[assetURL] options:nil] lastObject];
        }
    }

    return asset;
}

- (NSString *)filenameForAsset:(PHAsset *)asset {
    NSString *filename = @"";
    if (@available(iOS 9.0, *)) {
        filename = [[PHAssetResource assetResourcesForAsset:asset] firstObject].originalFilename;
    } else {
        filename = [asset valueForKey:@"filename"];
    }

    return filename;
}

使用UIImagePickerController获取图像文件名

3 个答案: