I have video URL and want to delete it from the iPhone using this URl

问题

I have created a app that stores video, now I want to remove that video when a user clicks a remove button. I am using AVFoundation for record video.

My app camera gives me an output URL like this:

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

I have tried this but it did not work:

- (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]);
    }
}

EDIT

   - (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);
            }
        }

    }

My log file has:

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

This function is what I use to store data in the iPhone:

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];
    }
}

回答1:

U can get Document Directory path like this:

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

Now remove item like this:

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"); 
}

回答2:

Check [NSHomeDirectory() stringByAppendingPathComponent:@"tmp/output.mov"]; is the same with the outputFileURL in [library writeVideoAtPathToSavedPhotosAlbum:outputFileURL completionBlock:^(NSURL *assetURL, NSError *error) {

回答3:

answer is Simple, you cannot delete file from Document Directory. Its Readable and writeable only.

You can achieve your purpose by giving path for tmp directory , and then for saving purpose move it from the tmp path to document directory. Thats it.

来源：https://stackoverflow.com/questions/13193661/i-have-video-url-and-want-to-delete-it-from-the-iphone-using-this-url

标签

iphone

ios

avfoundation