如何获取AVURLAsset的文件名？

I obtain the URL of an AVURLAsset like this:

我获取了AVURLAsset的URL,如下所示:

NSURL *url = [[asset defaultRepresentation] url];

In console, the AVURLAsset's url looks like this:

在控制台中,AVURLAsset的URL如下所示:

assets-library://asset/asset.mov?id=A3210417-4BAC-1C78-BD93-4BDD286247D9&ext=mov

I tried getting file name with extension from URL like this:

我尝试从URL获取带扩展名的文件名,如下所示:

NSString *last = [[url URLByDeletingPathExtension] lastPathComponent];
NSString *tnFileName = [NSString stringWithFormat:@"%@_tn.%@", last, url.pathExtension];

Here is console log of tnFileName:

这是tnFileName的控制台日志:

tnFileName = asset_tn.mov

tnFileName = asset_tn.mov

How can I get a string of the A3210417-4BAC-1C78-BD93-4BDD286247D9 portion? Or is there a different unique ID for an asset to use for caching still images of the asset?

如何获得A3210417-4BAC-1C78-BD93-4BDD286247D9部分的字符串?或者资产是否有不同的唯一ID用于缓存资产的静态图像?

To clarify, I need this to store thumbnails to disk and I want to use a name that matches the asset.

为了澄清,我需要将缩略图存储到磁盘,我想使用与资产匹配的名称。

2 个解决方案

#1

play with the string like this:

玩这样的字符串:

NSString * urlName = @"assets-library://asset/asset.mov?id=A3210417-4BAC-1C78-BD93-

4BDD286247D9&ext=mov";

    NSArray *arr = [urlName componentsSeparatedByString:@"id"];

    NSString *str = [arr lastObject];

    NSArray *arr1 = [str componentsSeparatedByString:@"&"];

    NSLog(@"array is %@",arr1);

    NSString *str2 = [[arr1 objectAtIndex:0] substringFromIndex:1];

    NSLog(@"str2 is %@",str2);

output will be A3210417-4BAC-1C78-BD93-4BDD286247D9 :)

输出将是A3210417-4BAC-1C78-BD93-4BDD286247D9 :)

#2

Try like this:

试试这样:

NSString * urlName = @"assets-library://asset/asset.mov?id=A3210417-4BAC-1C78-BD93-

NSString * urlName = @“assets-library://asset/asset.mov?id = A3210417-4BAC-1C78-BD93-

4BDD286247D9&ext=mov";

NSArray *arr = [urlName componentsSeparatedByString:@"id"];

NSString *str = [arr lastObject];

NSArray *arr1 = [str componentsSeparatedByString:@"&"];

NSLog(@"array is %@",arr1);

NSString *str2 = [[arr1 objectAtIndex:0] substringFromIndex:1];

NSLog(@"str2 is %@",str2);

#1