Question

可能重复：
How to pass data to detail view after being selected in a table view?

我正在使用plist（字典数组）来填充tableview。现在，当我按下一个单元格时，我想将带有重新设计的字典传递给带有segue的详细视图。它正常工作以填充tableview，但如何将相同的值发送到详细信息视图？这是我的尝试：

#import "WinesViewController.h"
#import "WineObject.h"
#import "WineCell.h"
#import "WinesDetailViewController.h"

@interface WinesViewController ()

@end

@implementation WinesViewController

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

- (void)viewDidLoad
{
    [super viewDidLoad];

}

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

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

#pragma mark - Table view data source

- (void)viewWillAppear:(BOOL)animated {
    wine = [[WineObject alloc] initWithLibraryName:@"Wine"];
    self.title = @"Vinene";
    [self.tableView deselectRowAtIndexPath:[self.tableView indexPathForSelectedRow] animated:YES];
}

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
    // Return the number of sections.
    return 1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    // Return the number of rows in the section.
    return [wine libraryCount];
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier = @"wineCell";

    WineCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];

    // Configure the cell...


    cell.nameLabel.text = [[wine libraryItemAtIndex:indexPath.row] valueForKey:@"Name"];
    cell.districtLabel.text = [[wine libraryItemAtIndex:indexPath.row] valueForKey:@"District"];
    cell.countryLabel.text = [[wine libraryItemAtIndex:indexPath.row] valueForKey:@"Country"];
    cell.bottleImageView.image = [UIImage imageNamed:[[wine libraryItemAtIndex:indexPath.row] valueForKey:@"Image"]];
    cell.flagImageView.image = [UIImage imageNamed:[[wine libraryItemAtIndex:indexPath.row] valueForKey:@"Flag"]];
    cell.fyldeImageView.image = [UIImage imageNamed:[[wine libraryItemAtIndex:indexPath.row] valueForKey:@"Fylde"]];
    cell.friskhetImageView.image = [UIImage imageNamed:[[wine libraryItemAtIndex:indexPath.row] valueForKey:@"Friskhet"]];
    cell.garvesyreImageView.image = [UIImage imageNamed:[[wine libraryItemAtIndex:indexPath.row] valueForKey:@"Garvesyre"]];

    return cell;
}


#pragma mark - Table view delegate

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

    if ([[segue identifier] isEqualToString:@"DetailSegue"]) {

        NSIndexPath *selectedRowIndex = [self.tableView indexPathForSelectedRow];
        WinesDetailViewController *winesdetailViewController = [segue destinationViewController];
        //Here comes the error line:
        winesdetailViewController.winedetailName = [wine objectAtIndex:indexPath.row] valueForKey:@"Name"];
    }
}

我收到一个错误：

winesdetailViewController.winedetailName = [wine objectAtIndex:indexPath.row] valueForKey:@"Name"];

使用未声明的标识符：indexPath。你的意思是NSIndexPath？我想我错过了一些重要的事情......

Answer 1

而不是indexPath.row（在此函数中不存在，就像它在作为参数传递的tableView:cellForRowAtIndexPath:函数中一样）使用selectedRowIndex，如下所示：

 winesdetailViewController.winedetailName = [wine objectAtIndex:selectedRowIndex.row] valueForKey:@"Name"];

或者，更好的是，将您的详细视图控制器更改为只接受整个字典，传递字典，并让它设置其自己的值：

 winesdetailViewController.winedetail = [wine objectAtIndex:selectedRowIndex.row];

Answer 2

错误是正确的，那里没有定义变量indexPath。但是，在该行之上只有几行，您可以定义selectedRowIndex，这可能具有您所追求的价值。

在视图之间传递数据时出错

2 个答案: