iOS中xib与storyboard各种加载

UIView *view = [[NSBundle mainBundle] loadNibNamed:@"MyView" owner:self options:nil][0];    

UIViewController *vc = [[ViewController alloc] initWithNibName:@"ViewController" bundle:nil];

 UIStoryboard*storyboard = [UIStoryboard storyboardWithName:@"Main" bundle:nil];
 UIViewController*vc = [storyboard instantiateInitialViewController];

//第一步在控制器生命周期中注册
[self.msgTableView registerNib:[UINib nibWithNibName:@"RTJFMyMsgTableViewCell" bundle:nil] forCellReuseIdentifier:cellID];

//第二步在表格数据源代理中返回
 RTJFMyMsgTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellID];
    if (cell == nil) {
        cell = [[RTJFMyMsgTableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellID];
    }
    return cell;