IOS How to check file exist in documents

+ (BOOL) checkFileExist:(NSString*) folderName file:(NSString*) file  {
   
    NSString *filePath;
    NSString* documentsDirectory = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];   
   
    if([folderName length] == 0) {
        filePath = [[documentsDirectory stringByAppendingString:@"/"] stringByAppendingString:file];
    } else {
        filePath = [[[[documentsDirectory stringByAppendingString:@"/"] stringByAppendingString:folderName] stringByAppendingString:@"/"] stringByAppendingString:file];
    }
   
    // Delete the file using NSFileManager
    NSFileManager *fileManager = [NSFileManager defaultManager];
    BOOL check = [fileManager fileExistsAtPath:filePath];
    return check;
}

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