Xcode 4.3.3：如何在初始化时分配视图控制器

Question

Hy all。 由于我使用IOS 5，因此我使用了故事板。 在旧版本中，我可以很容易地编写initWithNibName:@"Details"，它的工作方式就像一个魅力。 现在在故事板中，由于我没有使用任何XIB文件，我需要做同样的事情。 这里是我的代码片段：

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { 

    //Get the selected country 
    NSString *selectedAuthors = [theauthors objectAtIndex:indexPath.row]; 

    //Initialize the detail view controller and display it. 
    Details *dvController = [[Details alloc] initWithNibName:@"Details" bundle:nil]; 

    dvController.selectedAuthors = selectedAuthors; 
    [self.navigationController pushViewController:dvController animated:YES]; 
    [dvController release]; 
    dvController = nil; 
} 

我的新片段：

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { 

    //Get the selected country 
    NSString *selectedAuthors = [theauthors objectAtIndex:indexPath.row]; 


    UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"MainStoryboard.storyboard" bundle:nil]; 
    Details *dvController = [storyboard instantiateViewControllerWithIdentifier:@"Details"]; //Or whatever identifier you have defined in your storyboard 


    //Initialize the detail view controller and display it. 
    //Details *dvController = [[Details alloc] init/*WithNibName:@"Details" bundle:nil*/]; 

    dvController.selectedAuthors = selectedAuthors; 
    [self.navigationController pushViewController:dvController animated:YES]; 
    [dvController release]; 
    dvController = nil; 
} 

应用程序日志：

2012-07-17 16:30:15.760 AuthorsApp[6534:f803] WARNING: Using legacy cell layout due to delegate implementation of tableView:accessoryTypeForRowWithIndexPath: in <AuthorVC: 0x6857ba0>. Please remove your implementation of this method and set the cell properties accessoryType and/or editingAccessoryType to move to the new cell layout behavior. This method will no longer be called in a future release. 
2012-07-17 16:30:16.167 AuthorsApp[6534:f803] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Storyboard (<UIStoryboard: 0x6867750>) doesn't contain a view controller with identifier 'Details'' 
*** First throw call stack: 
(0x1595022 0x1726cd6 0x500fef 0x3151 0x1675c5 0x1677fa 0x9fc85d 0x1569936 0x15693d7 0x14cc790 0x14cbd84 0x14cbc9b 0x147e7d8 0x147e88a 0xd6626 0x1dc2 0x1d35) 
terminate called throwing an exception(lldb) 

最新应用程序日志：

2012-07-17 16:35:15.352 AuthorsApp[6600:f803] WARNING: Using legacy cell layout due to delegate implementation of tableView:accessoryTypeForRowWithIndexPath: in <AuthorVC: 0x688d810>. Please remove your implementation of this method and set the cell properties accessoryType and/or editingAccessoryType to move to the new cell layout behavior. This method will no longer be called in a future release. 
2012-07-17 16:35:15.912 AuthorsApp[6600:f803] Everything is ok now ! 
(lldb) 

最后登录

Couldn't register com.test.erc.AuthorsApp with the bootstrap server. Error: unknown error code. 
This generally means that another instance of this process was already running or is hung in the debugger.(lldb) 

Answer 1

你可以实例化位于你的故事板这样的控制器：

UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"myStoryboard" bundle:nil]; 
Details *dvController = [storyboard instantiateViewControllerWithIdentifier:@"Details"]; //Or whatever identifier you have defined in your storyboard 

---

另一种选择，因为你用故事板是用segues的过渡。 Here is a nice example。您可以通过segues免费获得的一件事是目标控制器会自动为您实例化。委托方法是这样的：

-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender{ 
    if([[segue identifier] isEqualToString:@"Details"]){ 
     Details *dvController = (Details *)[segue destinationViewController]; 
     // Pass any data to destination controller 
     // The transition is handled by the segue and defined in the Storyboard ('push' for example) 
    } 
} 

编辑 下面是简单的参考截图：