Question

我有一个UITableView，里面有10个单元格。我有UIButton＆amp;所有10个单元格内UILabel。现在，如果我在第二个单元格中选择UIButton，我将导航到另一个页面并选择一些值（字符串值）。现在，我希望将该字符串放在第二个单元格的UILabel中。同样，如果我选择第5个单元格上的UIButton，我将导航到另一个页面，选择一些字符串，并且该字符串必须放在第5个单元格的UILabel中。如何在特定单元格的UILabel内插入值。

赞赏我们的想法。

Answer 1

我建议将第二个视图控制器设置为包含第一个视图控制器的实例，这样您就可以从第二个视图中操作第一个视图控制器的数据数组。

例如，在您创建FirstViewController以执行推送的SecondViewController部分中（因为正如您在评论中所说的那样，您正在使用{推送视图控制器} {1}}），同时使UINavigationController包含SecondViewController的实例。

FirstViewController .m：

FirstViewController

在// Method to handle the push transition - (void)buttonPressed:(UIButton*)button { // Set the view controller's `selectedRow` property // to contain the selected row number as contained in // the button tag in this particular scenario self.selectedRow = (int)button.tag; // Create an instance of SecondViewController SecondViewController *secondViewController = [[SecondViewController alloc] initWithNibName:@"SecondViewController" bundle:nil]; // Pass the view controller along by setting // the secondViewController's firstViewController // property to contain self, i.e. the current // instance of the FirstViewController secondViewController.firstViewController = self; // Push to the SecondViewController [self.navigationController pushViewController:secondViewController animated:YES]; }的.h中，添加SecondViewController属性，以便可以从firstViewController公开访问。

FirstViewController .h：

SecondViewController

然后在#import "FirstViewController.h" @interface SecondViewController : UIViewController @property (weak, nonatomic) FirstViewController *firstViewController;的.m中，您可以根据需要在SecondViewController中操作作为表格数据源的数组，然后再弹出视图。

FirstViewController .m：

SecondViewController

此外，您希望// Method called after the string is selected - (void)stringSelected:(NSString*)string { // Update the array to contain the string // (or do whatever manipulation to whatever data // structure is fitting in your particular case) [self.firstViewController.array replaceObjectAtIndex:self.firstViewController.selectedRow withObject:string]; // To go back to the previous view, pop the view controller [self.navigationController popViewControllerAnimated:YES]; }的数据源UITableView和array属性包含在selectedRow的.h中，以便它可以从FirstViewController公开访问。

SecondViewController .h：

FirstViewController

在@property (weak, nonatomic) NSMutableArray *array; @property (nonatomic) int selectedRow;的.m中，您希望确保在从其他视图返回时重新加载表数据，以便FirstViewController反映更新的数据。

UITableView .m：

FirstViewController

Answer 2

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
CustomTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"CellName" forIndexPath:indexPath];
if(cell == nil)
{
    cell = [[CustomTableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"CellName"];
}

//Assigning the contents of cell
cell.labelName.text = [NSString stringWithFormat:@"%@", [self.arrCategoryTitle objectAtIndex:indexPath.row]];

[cell.buttonName addTarget:self action:@selector(buttonNamePressed:) forControlEvents:UIControlEventTouchDown];

// Configure the cell...

return cell;
}

- (void)buttonNamePressed:(UIButton *)sender
{
CGPoint swipepoint = sender.center;
CGPoint rootViewPoint = [sender.superview convertPoint:swipepoint toView:self.tableName];
NSIndexPath *indexPath = [self.tableName indexPathForRowAtPoint:rootViewPoint];
NSLog(@"%@", indexPath);

[self.tableName cellForRowAtIndexPath:indexPath];
self.defaultRowId = indexPath.row;
[self performSegueWithIdentifier:@"viewControllerIdentifierName" sender:self];

}

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{

        DetailsViewController *detailsViewController = (DetailsViewController *)[(UINavigationController *)segue.destinationViewController topViewController];
        detailsViewController.defaultrow = self.defaultRowId;

}

现在当你导航到secondViewController时，将选择字符串值设置为firstViewController的属性，然后重新加载表。

如何从另一个视图控制器将值插入UITableViewCell

2 个答案: