Ios 如何从PHAsset获取图像URL？是否可以使用Phaset URL将图像保存到文档目录？

我曾经

但当我尝试使用URL保存图像时，URL为零

  `NSURL *urlA = [info valueForKey:@"PHImageFileURLKey"];`

---

您可以从以下位置获取imageURL：

斯威夫特：

 `NSData *pngData =[NSData dataWithContentsOfURL:urlA options:NSDataReadingMapped error:nil];`

目标C：

asset.requestContentEditingInput(with: PHContentEditingInputRequestOptions()) { (eidtingInput, info) in
  if let input = eidtingInput, let imgURL = input.fullSizeImageURL {
     // imgURL 
  }
}

---

asset=在这里，您必须通过PHAsset

[asset requestContentEditingInputWithOptions:[PHContentEditingInputRequestOptions new] completionHandler:^(PHContentEditingInput *contentEditingInput, NSDictionary *info) {
    NSURL *imageURL = contentEditingInput.fullSizeImageURL;
}];

选择横向模式或纵向模式的图像

PHImageRequestOptions * imageRequestOptions = [[PHImageRequestOptions alloc] init];
 [[PHImageManager defaultManager]
             requestImageDataForAsset:asset
                            options:imageRequestOptions
                      resultHandler:^(NSData *imageData, NSString *dataUTI,
                                      UIImageOrientation orientation, 
                                      NSDictionary *info) 
     {
          NSLog(@"info = %@", info);
          if ([info objectForKey:@"PHImageFileURLKey"]) {

               NSURL *path = [info objectForKey:@"PHImageFileURLKey"];
               // if you want to save image in document see this.
               [self saveimageindocument:imageData withimagename:[NSString stringWithFormat:@"DEMO"]];
          }                                            
    }];

-(void) saveimageindocument:(NSData*) imageData withimagename:(NSString*)imagename{

    NSString *writePath = [NSString stringWithFormat:@"%@/%@.png",[Utility getDocumentDirectory],imagename];

    if (![imageData writeToFile:writePath atomically:YES]) {
        // failure
        NSLog(@"image save failed to path %@", writePath);

    } else {
        // success.
        NSLog(@"image save Successfully to path %@", writePath);
    }

}
+ (NSString*)getDocumentDirectory {
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    return [paths objectAtIndex:0];
}

将此权限添加到info.plist文件中

if (chooseimage.size.height >= chooseimage.size.width)
{
         Islandscape = NO;
}else{
     UIImage* landscapeImage = [UIImage imageWithCGImage:chooseimage.CGImage
                                                      scale:chooseimage.scale
                                                orientation:UIImageOrientationLeft];
        self.imgPreviewView.image = landscapeImage;
        self.imgPreviewView.contentMode = UIViewContentModeScaleAspectFill;
        Islandscape = YES;
 }

NSPhotoLibraryUsageDescription
$（产品名称）希望访问您的照片库，以便您选择图片。

//这是获取图像URL的完整Swift代码，带有Himanshu Moradiya的PHAsset答案

<key>NSPhotoLibraryUsageDescription</key>
<string>$(PRODUCT_NAME) would like to access your photo library to let you select a picture.</string>

---

@a-tuo请用客观C回答，因为我对这个问题一无所知Swift@KeyurAspiration您是否在plist中添加了“隐私-照片库使用说明”密钥以获得访问照片的权限？@a-tuo是的，我已经给出了此“隐私-照片库使用说明”不适用于我（iOS 14.4）PHImageFileURLKey未包含在字典中。如果映像不是本地映像，“isNetworkAccessAllowed”的属性需要设置为true。请参阅完整代码：

let requestOptions=PHContentEditingInputRequestOptions（）requestOptions.isNetworkAccessAllowed=true asset.requestContentEditingInput（with:requestOptions）{（editingInput，info）in}

检查我的答案希望您清楚回答谢谢ans我尝试了您的ans，但我在日志上收到了此类错误打印：：设置安全信息：不允许操作，并且我尝试将图像从Phaset URL保存到文档目录，但是由于安全原因，我得到了一个错误-不允许访问。您必须在info.plist文件中添加我在回答中添加的一个内容@KeyurAspirationi已经在info.plist中添加了照片、摄像头、麦克风描述访问、，还有一件事是，图像数组以另一种方式保存到文档目录中，但没有内存不足的警告问题。因此，请告诉我。@KeyurAspiration检查我的更新答案，将图像存储在文档文件夹中。图像不是从服务器获取的，它是使用图像选择器库从照片库中拾取的。

  let imageRequestOptions = PHImageRequestOptions()
  PHImageManager.default().requestImageData(for: currentAsset, options: imageRequestOptions, resultHandler: { imageData, dataUTI, orientation, info in
    if let info = info {
      print("info = \(info)")
    }
    if info?["PHImageFileURLKey"] != nil {

      let path = info?["PHImageFileURLKey"] as? URL
       print(path) //here you get complete URL


      // if you want to save image in document see this.
     // self.saveimageindocument(imageData, withimagename: "DEMO")
    }
  })