xcode 如何在方法中更改 detailViewController
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How do you change the detailViewController in a method
提问by Chris B
I have a view that is doing a lot of functions and when I get to the point that I am done I want to change to a newViewcontroller. if I where to do this from the rootview I just call.
我有一个视图正在执行很多功能，当我完成时，我想更改为newViewcontroller. 如果我从 rootview 中执行此操作，我只需调用。
NewPageViewController *newDetailViewController = [[NewPageViewController alloc] initWithNibName:@"NewPageViewController" bundle:nil];
detailViewController = newDetailViewController;
But I need to do it from my old detail (the right side)
但我需要从我的旧细节（右侧）
I am downloading a file in a splitview iPad app from the right side and after the file is downloaded I need to in my method change the right side of the splitview to a new nib file so I can open and edit the file
我正在从右侧的 splitview iPad 应用程序中下载文件，下载文件后，我需要在我的方法中将 splitview 的右侧更改为新的 nib 文件，以便我可以打开和编辑文件
Can someone point me in the right way.
有人可以以正确的方式指出我。
Now I have :
我现在有 ：
-(void)changeView {
ListController *newDetailViewController = [[ListController alloc] initWithNibName:@"ListController"bundle:nil]
NSArray *viewControllers = [NSArray arrayWithObjects:[splitViewController.viewControllers objectAtIndex:0], newDetailViewController, nil];
splitViewController.viewControllers = viewControllers;
[viewControllers release];
}
-(void)downloadfile {
//I do all my work and get the file.
NSLog(@"I need to change views now.");
[self changeView];
}
I don't get any errors but the right side view is not changing.
我没有收到任何错误，但右侧视图没有改变。
回答by chris
As of iOS8 you can use the -showDetailViewController:sender:method on the UISplitViewController. See the Apple docs on UISplitViewController.
从 iOS8 开始，您可以使用-showDetailViewController:sender:UISplitViewController 上的方法。请参阅UISplitViewController 上的Apple 文档。
回答by occulus
There is an NSArray *viewControllersproperty on the UISplitViewControllerclass. The first item in this array is your master VC, the second in the detail VC. Re-assign this property to a new array containing the same master VC but a new details VC:
类上有一个NSArray *viewControllers属性UISplitViewController。此数组中的第一项是您的主 VC，详细信息 VC 中的第二项。将此属性重新分配给包含相同主 VC 但新的详细信息 VC 的新数组：
// don't forget to set the delegate of myNewDetailViewController appropriately!
myNewDetailViewController.delegate = ...
NSArray newVCs = [NSArray arrayWithObjects:[uiSplitVC.viewControllers objectAtIndex:0], myNewDetailViewController, nil];
uiSplitVC.viewControllers = newVCs;
API ref for UISplitViewController: http://developer.apple.com/library/ios/#documentation/uikit/reference/UISplitViewController_class/Reference/Reference.html
UISplitViewController 的 API 参考：http: //developer.apple.com/library/ios/#documentation/uikit/reference/UISplitViewController_class/Reference/Reference.html
N.B: do not try replacing the master VC-- it usually goes horribly wrong somehow. I tried many many waysof replacing the master, it always went wrong in some very annoying way. Replacing the detail VC is fine though!
注意：不要尝试更换主 VC——它通常会以某种方式出现可怕的错误。我尝试了很多替换 master 的方法，但总是以一些非常烦人的方式出错。不过，更换细节 VC 很好！
回答by daris mathew
As @chris mentioned you can the use Delegate of UISplitViewController for iOS 8 and above which is the best possible way.
正如@chris 提到的，您可以在 iOS 8 及更高版本中使用 UISplitViewController 的委托，这是最好的方法。
-(void)showDetailViewController:(UIViewController *)vc sender:(nullable id)sender NS_AVAILABLE_IOS(8_0);
