二进制存入文件格式为.mov

    

//    NSString* filePath = nil;

//    NSArray* folders = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);

//    filePath = [folders objectAtIndex:0];

//    

//    filePath = [filePath stringByAppendingString:@"/LLW/hanlinbinnn/"];

//    

//    if([[NSFileManager defaultManager] fileExistsAtPath:filePath] == NO)

//    {

//        [[NSFileManager defaultManager] createDirectoryAtPath:filePath withIntermediateDirectories:YES attributes: nil error:nil];

//    }

//    

//    NSString* fileName = nil;

//    NSDateFormatter* date = [[NSDateFormatter alloc] init];

//    [date setDateFormat:@"yyyy-MM-dd HH:mm:ss"];

//    fileName = [date stringFromDate:[NSDate date]];

//    

//    fileName = [fileName stringByAppendingString:@".mov"];

//    filePath = [filePath stringByAppendingString: fileName];

//    

//    

//    

//    NSLog(@"路径是：%@",filePath);

//    NSLog(@"%lu",(unsigned long)datdd.length);

//    [datdd writeToFile:filePath atomically:YES];  datadd就是要存的二进制（这里是视频）