ios - 从另一个 UIViewController 刷新表格

Question

我有两个 View Controller ，其中一个 (ViewController) 有一个名为 tableView 的表。

我想从我的其他 View Controller (pageView) 刷新此表。

我已经在 pageView 中试过了:

ViewController*refresh;
[refresh.tableView reloadData];

但这行不通。

两个 View Controller 之间的连接转场是一个推送转场

我该怎么办？我应该通过 Storyboard转场来完成吗？

Answer 1

选项 1

@Class2

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

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

@Class1

// 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

@第 2 类

// 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

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