objective-c - 从 UIViewController 导航返回时无法更新 UITableViewController 中的 TableCelView

Question

我有一个导航 View Controller ，它与 UITableViewController 链接。 .
在表格 View Controller 中，我有静态单元格。我有表格 View 单元格的正确标签格式。我将导航到 UIViewController当点击 UITableViewCell然后当我导航回我的 UITableViewController ，我想更新我的 UITableViewCell 上的详细信息标签.

我能够从 enter code here 传递值e UIViewController到UITableViewcontroller .我已经使用 NSLog 验证了这一点.但我无法更新单元格中的详细信息标签。

我用了-(void) tableView:(UITableView *) tableView didDeselectRowAtIndexPath但这对我没有帮助，因为只有当我单击另一个表格 View 单元格时，表格 View 单元格才会更新。我希望此更新在我导航回 UITableViewController 时自动发生

请检查以下链接
http://www.icodeblog.com/wp-content/uploads/2011/10/navigation_interface.jpeg

我想要类似上图的东西

如何才能做到这一点。

更新代码

@interface designTableViewController ()

@end

@implementation designTableViewController
{
    glimmpseliteAppDelegate *appDelegate;
}

- (id)initWithStyle:(UITableViewStyle)style
{
    self = [super initWithStyle:style];
    if (self) {
        // Custom initialization
    }
    return self;
}

- (void)viewDidLoad
{

    appDelegate = [[UIApplication sharedApplication]delegate];
    [super viewDidLoad];
}

- (void)viewDidUnload
{
    [super viewDidUnload];
}

-(void)viewWillAppear:(BOOL)animated
{

}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    return (interfaceOrientation == UIInterfaceOrientationPortrait);
}

#pragma mark - Table view data source

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
    return 1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{

    return 8;
}

#pragma mark - Table view delegate

-(void) tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    if(indexPath.row == 1)
    {
        UITableViewCell *tb = [tableView cellForRowAtIndexPath:indexPath];
        UIViewController *uiViewController = [self.storyboard instantiateViewControllerWithIdentifier:@"designSolvingForViewController"];
        [self.navigationController pushViewController:uiViewController animated:YES];
        tb.detailTextLabel.text = appDelegate.solvingFor;


    }
    if(indexPath.row == 2)
    {
        UIViewController *uiViewController = [self.storyboard instantiateViewControllerWithIdentifier:@"designTypeIErrorRate"];
        [self.navigationController pushViewController:uiViewController animated:YES];
        UITableViewCell *tb = [tableView cellForRowAtIndexPath:indexPath];
        tb.detailTextLabel.text = appDelegate.typeIError;
    }
    if(indexPath.row == 3)
    {
        UIViewController *uiViewController = [self.storyboard instantiateViewControllerWithIdentifier:@"designNumberOfGroups"];
        [self.navigationController pushViewController:uiViewController animated:YES];
        UITableViewCell *tb = [tableView cellForRowAtIndexPath:indexPath];
        tb.detailTextLabel.text = appDelegate.numberOfGroups;
    }

    if(indexPath.row == 4)
    {
        UIViewController *uiViewController = [self.storyboard instantiateViewControllerWithIdentifier:@"designRelativeGroupSize"];
        [self.navigationController pushViewController:uiViewController animated:YES];
        UITableViewCell *tb = [tableView cellForRowAtIndexPath:indexPath];
        tb.detailTextLabel.text = appDelegate.relativeGroupSize;
    }

    if(indexPath.row == 5)
    {
        UIViewController *uiViewController = [self.storyboard instantiateViewControllerWithIdentifier:@"designSmallestGroupSize"];
        [self.navigationController pushViewController:uiViewController animated:YES];
        UITableViewCell *tb = [tableView cellForRowAtIndexPath:indexPath];
        tb.detailTextLabel.text = appDelegate.smallestGroupSize;
    }

    if(indexPath.row == 6)
    {
        UIViewController *uiViewController = [self.storyboard instantiateViewControllerWithIdentifier:@"designMeansAndVariance"];
        [self.navigationController pushViewController:uiViewController animated:YES];
        UITableViewCell *tb = [tableView cellForRowAtIndexPath:indexPath];
        tb.detailTextLabel.text = appDelegate.meansAndVariance;
    }
}

- (void) tableView:(UITableView *)tableView didDeselectRowAtIndexPath:(NSIndexPath *)indexPath
{
    if(indexPath.row == 1)
    {
        UITableViewCell *tb = [tableView cellForRowAtIndexPath:indexPath];
        tb.detailTextLabel.text = appDelegate.solvingFor;
    }

    if(indexPath.row == 2)
    {
        UITableViewCell *tb = [tableView cellForRowAtIndexPath:indexPath];
        //tb.textLabel.text =@"Sample";
        tb.detailTextLabel.text = appDelegate.typeIError;
    }

    if(indexPath.row == 3)
    {
        UITableViewCell *tb = [tableView cellForRowAtIndexPath:indexPath];
        //tb.textLabel.text =@"Sample";
        tb.detailTextLabel.text = appDelegate.numberOfGroups;
    }


    if(indexPath.row == 4)
    {
        UITableViewCell *tb = [tableView cellForRowAtIndexPath:indexPath];
        //tb.textLabel.text =@"Sample";
        tb.detailTextLabel.text = appDelegate.relativeGroupSize;
    }

    if(indexPath.row == 5)
    {
        UITableViewCell *tb = [tableView cellForRowAtIndexPath:indexPath];
        //tb.textLabel.text =@"Sample";
        tb.detailTextLabel.text = appDelegate.smallestGroupSize;
    }

    if(indexPath.row == 6)
    {
        UITableViewCell *tb = [tableView cellForRowAtIndexPath:indexPath];
        //tb.textLabel.text =@"Sample";
        tb.detailTextLabel.text = appDelegate.meansAndVariance;
    }
}

@end

第一个表格单元格只是一个有按钮的单元格。我有一个用于那个按钮的推送 UIViewController。

Answer 1

在 viewWillAppear 中:使用 [tableView reloadData]。

- (void)viewWillAppear:(BOOL)animated
{
     [tableView reloadData];
}