swift两种获取相册资源PHAsset的路径的方法（绝对路径）

方法中使用到的phasset就是我们取到的PHAsset对象

方法一：

 let options = PHVideoRequestOptions()

 options.version = PHVideoRequestOptionsVersion.current

 options.deliveryMode = PHVideoRequestOptionsDeliveryMode.automatic

 let manager =PHImageManager.default()

 manager.requestAVAsset(forVideo: phasset, options: options, resultHandler: { (asset, audioMix, info) in

        let strArr =     ((info!asNSDictionary).object(forKey:"PHImageFileSandboxExtensionTokenKey")as!NSString).components(separatedBy:";")

        let url = strArr.last！

        print(url)

 })

方法二（比较简洁）：

 PHCachingImageManager().requestAVAsset(forVideo: phasset as PHAsset, options:nil, resultHandler: { (asset, audioMix, info) in

          let strArr =     ((info!asNSDictionary).object(forKey:"PHImageFileSandboxExtensionTokenKey")as!NSString).components(separatedBy:";")

         let url = strArr.last！

         print(url)

 })