我有视频URL，希望使用此URL将其从iPhone中删除

我已经创建了一个存储视频的应用程序，现在我想在用户单击删除按钮时删除该视频。我正在使用

AVFoundation

录制视频

我的app camera为我提供如下输出URL：

file://localhost/private/var/mobile/Applications/4B2E02E5-3EE2-493E-8ECF-4B1DA29B9387/tmp/output.mov

NSString *strPath =  [NSHomeDirectory() stringByAppendingPathComponent:@"Documents"];

NSError *error;
if ([fileManager fileExistsAtPath:path]) {
  if ([[NSFileManager defaultManager] isDeletableFileAtPath:strPath]) {
    BOOL success = [[NSFileManager defaultManager] removeItemAtPath:strPath error:&error];
    if (!success) {
        NSLog(@"Error removing file at path: %@", error.localizedDescription);
    }
    else
    {
        NSLog(@"File removed  at path: %@", error.localizedDescription);
    }
  }
  else
{
    NSLog(@"file not exists"); 
}

我尝试过这个方法，但不起作用：

- (void) removeFile:(NSURL *)fileURL
{

    NSString *filePath = [fileURL path];
    NSFileManager *fileManager = [NSFileManager defaultManager];
    if ([fileManager fileExistsAtPath:filePath]) {
        NSLog(@"here it is : %@",fileURL);
        NSError *error;
        // Attempt to delete the file at filePath2
        if ([fileManager removeItemAtPath:filePath error:&error] != YES)
            NSLog(@"Unable to delete file: %@", [error localizedDescription]);

        // Show contents of Documents directory
        NSLog(@"Documents directory: %@",
              [fileManager contentsOfDirectoryAtPath:filePath error:&error]);
    }
}

编辑

   - (IBAction)videoWillDelete:(id)sender {

        NSString *strPath =  [NSHomeDirectory() stringByAppendingPathComponent:@"output.mov"];

        NSLog(@"file is:%@",strPath);

        if ([[NSFileManager defaultManager] isDeletableFileAtPath:strPath]==YES) {
            NSLog(@"file is deletebale");
        }else {
            NSLog(@"file is not deletebale");
        }

        NSError *error;
        if ([[NSFileManager defaultManager] isDeletableFileAtPath:strPath]) {

            BOOL success = [[NSFileManager defaultManager] removeItemAtPath:strPath error:&error];

            if (!success) {
                NSLog(@"Error removing file at path: %@", error.localizedDescription);
            }
        }

    }

我的日志文件有：

2012-11-02 17:33:21.836 AVFoundationCam[1791:707] file is:/var/mobile/Applications/4B2E02E5-3EE2-493E-8ECF-4B1DA29B9387/output.mov

2012-11-02 17:33:21.838 AVFoundationCam[1791:707] file is not deletebale

这个函数是我用来在iPhone中存储数据的：

else {  
        ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init];
        [library writeVideoAtPathToSavedPhotosAlbum:outputFileURL
                                    completionBlock:^(NSURL *assetURL, NSError *error) {

                                        if (error) {
                                            if ([[self delegate] respondsToSelector:@selector(captureManager:didFailWithError:)]) {
                                                [[self delegate] captureManager:self didFailWithError:error];
                                            }                                           
                                        }

                                        if ([[UIDevice currentDevice] isMultitaskingSupported]) {
                                            [[UIApplication sharedApplication] endBackgroundTask:[self backgroundRecordingID]];
                                        }

                                        if ([[self delegate] respondsToSelector:@selector(captureManagerRecordingFinished:)]) {
                                            [[self delegate] captureManagerRecordingFinished:self];
                                        }
                                    }];
        //[library release];
    }
}

---

您可以获得

文档

目录

路径

如下：

file://localhost/private/var/mobile/Applications/4B2E02E5-3EE2-493E-8ECF-4B1DA29B9387/tmp/output.mov

NSString *strPath =  [NSHomeDirectory() stringByAppendingPathComponent:@"Documents"];

NSError *error;
if ([fileManager fileExistsAtPath:path]) {
  if ([[NSFileManager defaultManager] isDeletableFileAtPath:strPath]) {
    BOOL success = [[NSFileManager defaultManager] removeItemAtPath:strPath error:&error];
    if (!success) {
        NSLog(@"Error removing file at path: %@", error.localizedDescription);
    }
    else
    {
        NSLog(@"File removed  at path: %@", error.localizedDescription);
    }
  }
  else
{
    NSLog(@"file not exists"); 
}

现在删除如下项：

file://localhost/private/var/mobile/Applications/4B2E02E5-3EE2-493E-8ECF-4B1DA29B9387/tmp/output.mov

NSString *strPath =  [NSHomeDirectory() stringByAppendingPathComponent:@"Documents"];

NSError *error;
if ([fileManager fileExistsAtPath:path]) {
  if ([[NSFileManager defaultManager] isDeletableFileAtPath:strPath]) {
    BOOL success = [[NSFileManager defaultManager] removeItemAtPath:strPath error:&error];
    if (!success) {
        NSLog(@"Error removing file at path: %@", error.localizedDescription);
    }
    else
    {
        NSLog(@"File removed  at path: %@", error.localizedDescription);
    }
  }
  else
{
    NSLog(@"file not exists"); 
}

---

检查

[NSHomeDirectory（）stringByAppendingPathComponent:@“tmp/output.mov”]

与

[library writeVideoAtPathToSavedPhotosAlbum:outputFileURL]中的outputFileURL相同
completionBlock:^（NSURL*assetURL，NSError*error）{

答案很简单， 无法从文档目录中删除文件。该文件仅可读写

---

您可以通过为tmp目录指定路径来实现您的目的，然后为了保存目的，将其从tmp路径移动到文档目录。就是这样。

由于您没有添加任何相关信息，这是否意味着

removitematpath

返回

YES

，并且

错误
为
nil
？您可以选择哪种类型的错误日志您将日志？和文档目录放入其中，并为其提供nullmaybe？：NSString*strPath=[NSHomeDirectory（）stringByAppendingPathComponent:@“tmp/output.mov”]；我是否必须更改stringByAppendingPathComponent:@“Documents”的值，然后再次像这样添加您的文件名：[strPath stringByAppendingPathComponent:FileName here]；它说文件不可删除为什么？