从RootController更新DetailViewController [英] Updating DetailViewController from RootController
问题描述
我正在尝试使用与Apple的Mail应用程序类似的用户界面创建一个iPad应用程序，即：
I'm trying to create an iPad application with a similar user interface to Apple's Mail application, i.e:
- RootView控制器（表格）视图）在拆分视图的左侧，用于具有多视图层次结构的导航。当选择表格单元格时，左侧会按下新的表格视图。
- 左侧的新视图可以更新详细视图。
我可以完成这两项任务但不能完成任务。
我的意思是我可以在RootController中创建一个多级表视图。（这里你可以找到工作源代码）。
I can accomplish both tasks BUT NOT TOGETHER. I mean I can make a multi-level table view in the RootController.(HERE you can find the working source code).
或者我可以在RootController中创建一个单级表视图，它可以更新detailViewController（这里有源代码） ：http：//www.megaupload.com/？d = D6L0463G）。
Or I can make a single-level table view in the RootController which can update the detailViewController (here there is the source code:http://www.megaupload.com/?d=D6L0463G).
有谁能告诉我如何在RootController中制作一个可以更新的多级表一个detailViewController？
Can anyone tell me how to make a multi-level table in the RootController which can update a detailViewController?
链接上有更多的源代码，但下面是我假设我必须声明一个新的detailViewController的方法（必须放入UISplitViewController）：
There is more source code at the link but below is the method in which I presume I have to declare a new detailViewController (which has to be put in the UISplitViewController):
- (void)tableView:(UITableView *)TableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
NSDictionary *dictionary = [self.tableDataSource objectAtIndex:indexPath.row];
//Get the children of the present item.
NSArray *Children = [dictionary objectForKey:@"Children"];
//
if([Children count] == 0) {
/*
Create and configure a new detail view controller appropriate for the selection.
*/
NSUInteger row = indexPath.row;
UIViewController <SubstitutableDetailViewController> *detailViewController = nil;
if (row == 0) {
FirstDetailViewController *newDetailViewController = [[FirstDetailViewController alloc]initWithNibName:@"FirstDetailView" bundle:nil];
detailViewController = newDetailViewController;
}
if (row == 1) {
SecondDetailViewController *newDetailViewController = [[SecondDetailViewController alloc]initWithNibName:@"SecondDetailView" bundle:nil];
detailViewController = newDetailViewController;
}
// Update the split view controller's view controllers array.
NSArray *viewControllers = [[NSArray alloc] initWithObjects:self.navigationController, detailViewController, nil];
splitViewController.viewControllers = viewControllers//nothing happens.....
[viewControllers release];//
}
else {
//Prepare to tableview.
RootViewController *rvController = [[RootViewController alloc]initWithNibName:@"RootViewController" bundle:[NSBundle mainBundle]];
//Increment the Current View
rvController.current_level += 1;
//Set the title;
rvController.current_title = [dictionary objectForKey:@"Title"];
//Push the new table view on the stack
[self.navigationController pushViewController:rvController animated:YES];
rvController.tableDataSource = Children;
[rvController.tableView reloadData]; //without this instrucion,items won't be loaded inside the second level of the table
[rvController release];
}
}
推荐答案
抱歉，但我不能发布我的源代码，因为它包含敏感信息。当我有更多时间可用时，我将创建一个单独的项目并在某处上传代码。
Sorry, but I cannot post my source code as it contains sensitive information. When I have more time available I will create a separate project and upload the code somewhere.
以下是我到目前为止所做的工作的摘录（欢迎任何反馈）。
Here are extracts of how I have done it so far (I welcome any feedback).
RootViewController - 注意我的根表中有4个部分。
The RootViewController - Note I have 4 sections in my root table.
#pragma mark -
#pragma mark Table view delegate
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
[tableView deselectRowAtIndexPath:indexPath animated:YES];
// Detail view logic
NSUInteger section = indexPath.section;
UIViewController <SubstitutableDetailViewController> *detailViewController = nil;
if (section == 2) {
ProductSearchDetailView *viewController = [[ProductSearchDetailView alloc] initWithNibName:@"ProductSearchDetailView" bundle:nil];
detailViewController = viewController;
//[viewController release];
}
else {
DetailViewController *defaultDetailViewController = [[DetailViewController alloc] initWithNibName:@"DetailView" bundle:nil];
detailViewController = defaultDetailViewController;
//[defaultDetailViewController release];
}
// Navigation logic
switch (section) {
case 0:
{
break;
}
case 1:
{
break;
}
case 2:
{
// new Navigation view
ProductSearchViewController *viewController = [[ProductSearchViewController alloc] initWithNibName:@"ProductSearchViewController" bundle:nil];
viewController.navigationItem.backBarButtonItem.title = @"Back";
[self.navigationController pushViewController:viewController animated:YES];
[viewController release];
break;
}
case 3:
{
StoreLocatorNavController *viewController = [[StoreLocatorNavController alloc] initWithNibName:@"StoreLocatorNavController" bundle:nil];
viewController.navigationItem.backBarButtonItem.title = @"Back";
[self.navigationController pushViewController:viewController animated:YES];
[viewController release];
break;
}
}
// Update the split view controller's view controllers array.
NSArray *viewControllers = [[NSArray alloc] initWithObjects:self.navigationController, detailViewController, nil];
splitViewController.viewControllers = viewControllers;
[viewControllers release];
// Dismiss the popover if it's present.
if (popoverController != nil) {
[popoverController dismissPopoverAnimated:YES];
}
// Configure the new view controller's popover button (after the view has been displayed and its toolbar/navigation bar has been created).
if (rootPopoverButtonItem != nil) {
[detailViewController showRootPopoverButtonItem:self.rootPopoverButtonItem];
}
[detailViewController release];
}
NSNotificationCenter部分
NSNotificationCenter part
将此添加到ProductSearchViewController：
Add this to ProductSearchViewController:
#pragma mark -
#pragma mark Table view delegate
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
NSDictionary *itemAtIndex = (NSDictionary *)[self.productResults objectAtIndex:indexPath.row];
[[NSNotificationCenter defaultCenter] postNotificationName:@"updateProduct" object:itemAtIndex];
}
最后，将其添加到ProductSearchDetailViewController：
And finally, add this to ProductSearchDetailViewController:
- (void)viewDidLoad {
[super viewDidLoad];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(updateTheProductDetails:) name:@"updateProduct" object:nil];
}
- (void)updateTheProductDetails:(NSNotification *)notification {
NSDictionary *productDictionary = [NSDictionary dictionaryWithDictionary:[notification object]];
// product name
_productName.text = [productDictionary objectForKey:@"ProductDescription"];
}
希望有所帮助！
这篇关于从RootController更新DetailViewController的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
