IOS How to remove file in documents

+ (void) removeFileFromDocuments:(NSString*) folderName file:(NSString*) file  {
   
    NSString *filePath;
    NSString* documentsDirectory = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];   
   
    if([folderName length] == 0) {
        filePath = [[documentsDirectory stringByAppendingString:@"/"] stringByAppendingString:[file retain]];
    } else {
        filePath = [[[[documentsDirectory stringByAppendingString:@"/"] stringByAppendingString:[folderName retain]] stringByAppendingString:@"/"] stringByAppendingString:[file retain]];
    }
   
    // Delete the file using NSFileManager
    NSFileManager *fileManager = [NSFileManager defaultManager];
    [fileManager removeItemAtPath:filePath error:nil];
}

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