如何使用代理将数据添加到tableview？ [英] How to add data to tableview using a delegate?
问题描述
我正在使用桌面的初始视图控制器构建一个有趣的应用程序，您可以在其中查看单元格的详细信息，并将新数据添加到表视图中。
I'm building an app for fun with a initial view controller of a tableview, where you are able to see the details of the cells, and add new data to the tableview.
首先，这是项目，所以你可以加载它，看看。
http://dawtano.com/xc-project.zip
这是一个复杂的项目，我认为很多代码已经过时，但最初的应用程序正在运行，所以我不想清理它。
It's a bit of a complex project and I think much of the code is obsolete, but the initial app is working, so I don't want to clean it up just yet.
该应用程序围绕故事板构建，包括：
The app is built around storyboard and consists of:
- DataModel（包含初始的NSMutableArray）
- ViewController（主视图）
- EditGrade（将数据添加到tableview）
- 成绩（定义使用的字符串）
- GradeDetail（显示单元格的详细信息）
- DataModel (containing the initial NSMutableArray)
- ViewController (main view)
- EditGrade (adding data to the tableview)
- Grade (defining the strings used)
- GradeDetail (showing details of the cell)
EditGrade还包含一个代理，它将功能添加到取消和完成按钮。
EditGrade also contains a delegate which add function to the Cancel and Done button.
除了当我尝试向tableview添加新数据以外，一切都可以正常工作（除了GradeDetail上的Edit按钮）。该项目没有任何问题。
这是我收到的错误消息，我无法弄清楚问题是什么：
Everything works (except the Edit button on GradeDetail) as it should, except when I try and add new data to the tableview. The project builds with no issues. This is the error message I get and I haven't been able to figure out what the issue is:
2011-12-08 12:56:54.643 ArrayTableView[30711:f803] *** Assertion failure in -
[_UITableViewUpdateSupport _computeRowUpdates], /SourceCache/UIKit_Sim/UIKit-
1912.3/UITableViewSupport.m:386
2011-12-08 12:56:54.645 ArrayTableView[30711:f803] ***
Terminating app due to uncaught exception 'NSInternalInconsistencyException',
reason: 'Invalid table view update. The application has requested an update to
the table view that is inconsistent with the state provided by the data source.'
我希望有些人能够确定问题是什么，我目前盯着自己盲目。
I hope some of you will be able to determine what the issue is, I'm currently staring myself blind on it.
更新
感谢@TJ我在项目中发现错误，现在的问题是正确的实现它，所以addGrade工作。
Update
Thanks to @T.J. I found the mistake in the project, the problem now is implementing it correct, so addGrade works.
我在字段@TJ中添加了这个代码。指出：
I added this code in the field @T.J. pointed out:
- (void)tableView:(UITableView *)tableView commitEditingStyle:
(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{
if (editingStyle == UITableViewCellEditingStyleDelete) {
// Delete the row from the data source
[self.dataModel removeGradeAtIndex:indexPath.row];
[tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationAutomatic];
}
else if (editingStyle == UITableViewCellEditingStyleInsert) {
// Create a new instance of the appropriate class, insert it into the array,
and add a new row to the table view
[self.dataModel addGrade:(Grade*)grades];
[tableView insertRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationAutomatic];
}
}
我使用正确的编码？我有一种感觉
Am I using the correct coding? I have a feeling
[self.dataModel addGrade:(Grade*)grades];
不正确。由于DataModel使用：
is incorrect. Since the DataModel uses:
- (void)addGrade:(Grade*)grade
{
[self.grades addObject:grade];
}
推荐答案
@Matias如果你要去将行插入到您需要的代码段中：
@Matias If you are going to insert rows to the table you need to this code section:
else if (editingStyle == UITableViewCellEditingStyleInsert) {
// Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view
[self.dataModel addGrade ...
[tableView insertRowAtIndexPaths ...
代码将类似于上面写的代码，用于删除表中的一行：
The code will be similar to the code you wrote above that to delete a row in the table:
if (editingStyle == UITableViewCellEditingStyleDelete) {
// Delete the row from the data source
[self.dataModel removeGradeAtIndex:indexPath.row];
[tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
}
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