从另一个UIViewController刷新表

Question

我有两个视图控制器,其中一个(ViewController)有一个名为的表tableView.

我想从我的其他视图控制器(pageView)刷新此表.

我试过这个pageView:

ViewController*refresh;
[refresh.tableView reloadData];

但这不起作用.

两个视图控制器之间的连接segue是推送segue

我该怎么办？我应该通过故事板segue做到吗？

Answer 1

选项1

@类2

@property (nonatomic) BOOL shouldRefresh; // in .h file

- (void)viewWillAppear:(BOOL)animated // in .m file
{
    [super viewWillAppear:animated];
    if (_shouldRefresh) [self.tableView reloadData];
}

@ Class1的

// Add this in any method where you want it to refresh and push to view
ClassTwoController *viewController = [[ClassTwoController alloc] init];
[viewController setShouldRefresh:YES];
[self.navigationController pushViewController:viewController animated:YES];

*更新:

选项2

@Class 2

// Add this line in viewDidLoad in same class you want the tableView to refresh
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(refreshTableWithNotification:) name:@"RefreshTable" object:nil];

// Add this method just beneath viewDidLoad:
- (void)refreshTableWithNotification:(NSNotification *)notification
{
    [self.tableView reloadData];
}

@ Class1的

// Call this when ever you want to refresh the tableView in Class2
[[NSNotificationCenter defaultCenter] postNotificationName:@"RefreshTable" object:nil userInfo:nil];