获取保存到相册的图像文件名

时间:2017-05-04 19:19:21

标签: ios image ios10

通过这个看似简单的问题获得巨额赏金,但没有引起注意。

在现代iOS(2017)中,

这里实际上是我知道将图像保存到iOS照片系统的唯一方法,并获取文件名/路径。

import UIKit
import Photos

func saveTheImage... () {

    UIImageWriteToSavedPhotosAlbum(yourUIImage, self,
        #selector(Images.image(_:didFinishSavingWithError:contextInfo:)),
        nil)
}

func image(_ image: UIImage, didFinishSavingWithError error: NSError?, contextInfo: UnsafeRawPointer) {
    guard error == nil else {
        print("Couldn't save the image!")
        return
    }
    doGetFileName()
}

func doGetFileName() {
    let fo: PHFetchOptions = PHFetchOptions()
    fo.sortDescriptors = [NSSortDescriptor(key: "creationDate", ascending: false)]
    let r = PHAsset.fetchAssets(with: PHAssetMediaType.image, options: fo)
    if let mostRecentThingy = r.firstObject {

        PHImageManager.default().requestImageData(
            for: mostRecentThingy,
            options: PHImageRequestOptions(),
            resultHandler: { (imagedata, dataUTI, orientation, info) in

                if info!.keys.contains("PHImageFileURLKey") {
                    let path = info!["PHImageFileURLKey"] as! NSURL

                    print("Holy cow. The path is \(path)")
                }
                else { print("bizarre problem") }
            })

    }
    else { print("unimaginable catastrophe") }
}

这有两个问题:

1。 WTH?!?

2。它在赛道条件下失败。

这非常笨拙,而且在很多方面看起来很麻烦。

今天真的要走了吗?

2 个答案:

答案 0 :(得分:2)

您刚刚以编程方式保存图像,因此您可以从相机获取图像并将其保存为您的路径:

//save image in Document Derectory
      NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES);
      NSString *documentsDirectory = [paths objectAtIndex:0];
      NSLog(@"Get Path : %@",documentsDirectory);

      //create Folder if Not Exist
      NSError *error = nil;
      NSString *dataPath = [documentsDirectory stringByAppendingPathComponent:@"/YourFolder"];

      if (![[NSFileManager defaultManager] fileExistsAtPath:dataPath])
        [[NSFileManager defaultManager] createDirectoryAtPath:dataPath withIntermediateDirectories:NO attributes:nil error:&error]; //Create folder

      NSString *yourPhotoName=@"YourPhotoName";
      NSString* path= [dataPath stringByAppendingString:[NSString stringWithFormat:@"/%@.png",yourPhotoName]];
      NSData* imageData = UIImagePNGRepresentation(imageToSaved); //which got from camera

      [imageData writeToFile:path atomically:YES];

      imagePath = path;
      NSLog(@"Save Image Path : %@",imagePath);

答案 1 :(得分:0)

也许这是一种不同的方法,但这就是我在我的应用程序中所做的事情,我对此感到满意:

func saveImage(image: UIImage, name: String) {

    var metadata = [AnyHashable : Any]()
    let iptcKey = kCGImagePropertyIPTCDictionary as String
    var iptcMetadata = [AnyHashable : Any]()

    iptcMetadata[kCGImagePropertyIPTCObjectName as String] = name
    metadata[iptcKey] = iptcMetadata

    let library = ALAssetsLibrary()

    library.writeImage(toSavedPhotosAlbum: image.cgImage, metadata: metadata) { url, error in

        // etc...
    }
}

如果您不想使用ALAssetsLibrary,您可能会对this answer感兴趣。