iOS 5在填充表格之前等待委托完成？ [英] iOS 5 Wait for delegate to finish before populating a table?

问题描述

我正在开发iOS 5应用。我有一个视图控制器，它需要在打开后立即显示数据。所需的功能顺序是：

I am working on an iOS 5 app. I have a view controller that needs to display data as soon as its opened. The desired order of functionality is:

1. 呼叫网络服务


2. 等待来自Web服务（代理）


3. 填充数据数组


4. 使用数组填充列表视图


5. 显示列表视图

1. Call a web service
2. Wait for the reply from the web service (a delegate)
3. Fill a data array
4. Use the array to populate a list view
5. Show the list view

我已经准备好所有组件但是在进行Web服务调用之后，程序没有等待回复（异步调用），而是用空格填充列表视图，因为数据数据还没有准备好。

I have all of the components in place but after the web service call is made, the program doesn't wait for a reply (asynchronous call) and instead fills the list view with blanks since the data array is not quite ready.

所以我需要帮助（1）制作程序等到委托完成填充数组，然后填充列表视图或（2）在委托完成后重新初始化listview并重新填充整个列表视图。如果我移动列表视图（如向下滚动），我会看到所需的数据，因为视图已重新初始化。所以我知道我已经准备好所有组件，我只需要让它们以所需的顺序工作。

So I need help with either (1) making the program wait until the delegate finishes filling the array and then populating the list view or (2) re-initializing the listview after the delegate has completed and re-populating the whole list view. If I move the list view (like a scroll down) I see the desired data because the view is re-initialized. So I know that I have all the components in place, I just need to make them work in the desired order.

推荐答案

如果你的意思是列表视图中的UITableView实例，然后让web服务完成加载，然后刷新表视图：

If you mean "an UITableView instance" by list view, then let the web service finish loading, then refresh the table view:

- (void) myWebServiceDidFinishLoadingData
{
    [self.tableView reloadData];
}

希望这有帮助。

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