Question

我知道我们可以做＆＃34; cell＆＃34;推送导航样式将一些数据传递给下一个UIViewController。但是，我们也可以这样做，原型单元＆＃34;模态＆＃34;将数据传递给下一个UIViewController？这是我的tableview实现的一部分。

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

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    NSString *cellIdentifier = @"chatCell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier];
    if (cell == nil) {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:cellIdentifier];
    }

    NSString *fn = [[self.chatPeople objectAtIndex:indexPath.row] objectForKey:@"first_name"];
    NSString *ln = [[self.chatPeople objectAtIndex:indexPath.row] objectForKey:@"last_name"];

    cell.textLabel.text =[NSString stringWithFormat:@"%@ %@", fn, ln];
    cell.textLabel.textAlignment = UITextAlignmentRight;
    return cell;
}

现在我正在尝试将3个NSStrings传递到目标ViewController

-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
    NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow];

    NSString *toChatEmailID = [[self.chatPeople objectAtIndex:indexPath.row] objectForKey:@"id"];
    NSString *fn = [[self.chatPeople objectAtIndex:indexPath.row] objectForKey:@"first_name"];
    NSString *ln = [[self.chatPeople objectAtIndex:indexPath.row] objectForKey:@"last_name"];

    MessagesViewController *messageVc = [segue destinationViewController];
    messageVc.firstName = fn;
    messageVc.lastName = ln;
    messageVc.passedOverEmailID = @"1";
}

现在在我的目的地VC中，我希望这个VC的标题显示为＆＃34; firstname + lastname＆＃34;

@interface MessagesViewController ()

@end

@implementation MessagesViewController

@synthesize menuBtn;
@synthesize chatBtn;
@synthesize passedOverEmailID;
@synthesize firstName;
@synthesize lastName;

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    NSLog(@"%@ %@", firstName,lastName);
    self.navigationItem.title = [NSString stringWithFormat:@"Chatting with %@ %@", firstName, lastName];
}

以下是错误：

[ChatViewController setPassedOverEmailID:]: unrecognized selector sent to instance 0x8b4e0c0
2014-04-28 21:36:41.033 WeNetwork[1895:70b] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[ChatViewController setPassedOverEmailID:]: unrecognized selector sent to instance 0x8b4e0c0'

任何人都可以给我一些帮助，欢呼声

Answer 1

MessagesViewController *messageVc = (MessagesViewController *)[segue destinationViewController];

这不正确，destinationVC应该是另一个！

UITableViewController单元模式将数据传递给下一个UIViewController

1 个答案: