如何在分组表视图中显示存储为全局数据的xml数据 [英] How to display xml data that is stored as Global data in grouped table view

问题描述

我使用XML Parser来解析xml文件并存储为全局数据。我正在获取该数据并将其显示为表格。我使用此示例包含搜索功能。

I am using XML Parser to parse a xml file and store as Global data. I am fetching that data and displaying it as a table. I am using this sample to include search functionality.

我想将数据显示为带有字母和标题的分组表视图...

I wanted to display the dat as grouped table view with alphabets and the titles...

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        Adam

        Apple...

以下是我在没有小组的情况下显示表格的方式......

Here is how i am displaying the table earlier without groups...

-(UITableViewCell *) tableView : (UITableView *) tableView cellForRowAtIndexPath: (NSIndexPath *) indexPath 
{
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"acell"]; 

if(cell == nil) 
{ 
    cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"acell"] autorelease]; 
}

if(searching)
{
    Boat *copyboat = [copyListOfItems objectAtIndex:[indexPath row]];

    cell.textLabel.text = [copyboat boatName];
    NSLog(@"%@", [copyboat boatName]);
}
else {


    NSSortDescriptor *alphaDesc = [[NSSortDescriptor alloc] initWithKey:@"boatName" ascending:YES selector:@selector(localizedCaseInsensitiveCompare:)];
    [[data boats] sortUsingDescriptors:[NSMutableArray arrayWithObjects:alphaDesc, nil]];   
    Boat *fullboat =[data.boats objectAtIndex:[indexPath row]];
    cell.textLabel.text =[fullboat boatName];
    [alphaDesc release];



}

return cell; 

任何人都可以告诉我如何在表格视图中显示数据作为部分???任何示例代码或教程都会有很大的帮助...请帮助...

Can anyone please tell me how to display the data in table view as sections??? Any sample code or tutorial will be of great help... Please help...

推荐答案

你没有提到，你是怎么做的数据看起来像你解析它的数据类型。我假设全局数据意味着可以在应用程序范围内访问的一些NSArray。

如果你没有这样做，你应该考虑使用CoreData。

You are not mentioning, how your data looks like, to what kind of data you parse it. I assume that "Global data" means some NSArray that is accessible app-wide.
You should really consider of using CoreData, if you are not doing so.

我改编了Apples示例代码 CoreDataBooks ，以便它不使用作者名称来生成部分，但是它的第一个字母。

I adapted Apples sample code CoreDataBooks so that it is not using the authors name to generate the sections, but its first letter.

add在RootViewController实现之前的这个类别：

add this Category on Book before the implementation of RootViewController:

@interface Book (FirstLetter)
- (NSString *)uppercaseFirstLetterOfName;
@end

@implementation Book (FirstLetter)
- (NSString *)uppercaseFirstLetterOfName {
    [self willAccessValueForKey:@"uppercaseFirstLetterOfName"];

    NSString *aString = [[self valueForKey:@"author"] uppercaseString];     
    NSString *stringToReturn = [aString substringToIndex:1];

    [self didAccessValueForKey:@"uppercaseFirstLetterOfName"];
    if ([stringToReturn integerValue] || [stringToReturn isEqualToString:@"0"] ) {
        return @"#";
    }
    return stringToReturn ;
}
@end

在RootViewController的中 - （ NSFetchedResultsController *）fetchedResultsController getter

in RootViewController's - (NSFetchedResultsController *)fetchedResultsController getter

更改

NSFetchedResultsController *aFetchedResultsController = [[NSFetchedResultsController alloc] initWithFetchRequest:fetchRequest managedObjectContext:managedObjectContext sectionNameKeyPath:@"author" cacheName:@"Root"];

到

NSFetchedResultsController *aFetchedResultsController = [[NSFetchedResultsController alloc] initWithFetchRequest:fetchRequest managedObjectContext:managedObjectContext sectionNameKeyPath:@"uppercaseFirstLetterOfName" cacheName:@"Root"];

编辑回复评论

您可以使用NSDirectory，它将第一个字母作为键，将NSArray作为对象保存所有相关数据对象。

You could us a NSDirectory, that holds the first letter as key and a NSArray with all related data-objects as object.

• numberOfSectionsInTableView：将返回 [[theDirectory allKeys] count]


• tableView：titleForHeaderInSection：返回 [[theDirectory allKeys] objectAtIndex ：部分] 。这里没有显示排序。


• tableView：numberOfRowsInSection：返回 [theDirectory objectForKey：[[theDirectory allKeys] objectAtIndex ：section]]


• 和 tableView：cellForRowAtIndexPath：你使用 indexPath .section 和 indexPath.row 来解析正确的数据。

• numberOfSectionsInTableView: would return [[theDirectory allKeys] count]
• tableView:titleForHeaderInSection: returns [[theDirectory allKeys] objectAtIndex:section]. Sorting not shown here.
• tableView:numberOfRowsInSection: returns [theDirectory objectForKey:[[theDirectory allKeys] objectAtIndex:section]]
• and in tableView:cellForRowAtIndexPath: you use indexPath.section and indexPath.row to adress the right data.

我没有测试过这个。

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