调用[tableView reloadData]；在从modalViewController的viewController上 [英] Call [tableView reloadData]; on a viewController from a modalViewController

问题描述

我有一个modalViewController，它位于带有tableView的viewController的顶部.当用户单击modalViewController上的按钮时，我想使用以下方法在viewController中重新加载tableView:

I have a modalViewController that comes up over the top of a viewController with a tableView. When the user clicks a button on the modalViewController I want to reload the tableView within the viewController with this:

[tableView1 reloadData]; 

我不想将重载放入viewDidAppear或viewWillAppear方法中，因为当我不需要重载tableView时(即，当用户单击后退按钮以返回tableView时)它们被调用.

I do not want to put the reload in the viewDidAppear or viewWillAppear methods as they get called when i do not need the tableView to reload (i.e. when the user clicks the back button to return to the tableView).

有没有办法做到这一点?

Is there a way to do this?

推荐答案

使用类似于波纹管方法的通知:-

using Notification like bellow Method:-

在yourViewController的ViewdidLoad方法中创建NSNotificationCenter

Create NSNotificationCenter at yourViewController's ViewdidLoad Mehod

- (void)viewDidLoad
{
    [[NSNotificationCenter defaultCenter] addObserver:self
                                                 selector:@selector(ReloadDataFunction:)
                                                     name:@"refresh"
                                                   object:nil];

  [super viewDidLoad];

}
-(void)ReloadDataFunction:(NSNotification *)notification {

    [yourTableView reloadData];

}

现在，您可以从modelViewController BackButton调用此通知，或者您也可以通过调用此刷新通知，例如放置以下代码行:-

Now you can Call this Notification from your modelViewController BackButton or else you want from calling this Refresh notification like putting this line of code:-

[[NSNotificationCenter defaultCenter] postNotificationName:@"refresh" object:self];

注意: postNotificationName:@"refresh"这是特定通知的键

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