ObjectivecdidSelectRowIndexPath-將資料傳遞給其他視圖控制器

嗨，我正在嘗試將資料從我的 TableViewController_My_boards 傳遞到 ViewController_Update_Boards，但我不知道該怎么做所以首先我用來自 firestore 的資料創建了一個字典

- (void)viewDidLoad {
    [super viewDidLoad];
    
    // Uncomment the following line to preserve selection between presentations.
    // self.clearsSelectionOnViewWillAppear = NO;
    
    // Uncomment the following line to display an Edit button in the navigation bar for this view controller.
    // self.navigationItem.rightBarButtonItem = self.editButtonItem;
    _db = [FIRFirestore firestore];
    
    objNSDictinoaryListOfBoards =[[NSMutableDictionary alloc]initWithCapacity:5];
    [[self.db collectionWithPath:@"boards"]
        getDocumentsWithCompletion:^(FIRQuerySnapshot * _Nullable snapshot,
                                     NSError * _Nullable error) {
          if (error != nil) {
            NSLog(@"Error getting documents: %@", error);
          } else {
            for (FIRDocumentSnapshot *document in snapshot.documents) {
                NSString *key = document.documentID;
                NSDictionary *boardDetails = document.data;
                [self->objNSDictinoaryListOfBoards setObject:boardDetails forKey:key];
                
                //NSLog(@"%@ => %@", document.documentID, document.data);

            }
              NSLog(@"self->objNSDictionaryListOfBoards= %@", self->objNSDictinoaryListOfBoards);
              [self.tableView reloadData];

          }
        }];}

之后，我在表格視圖單元格中顯示每個專案的名稱

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
   UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"SimpleIdentifier1" forIndexPath:indexPath];
   
   // Configure the cell...
   NSString *boardNo =[objNSDictinoaryListOfBoards allKeys][indexPath.row];
   NSString *boardName =objNSDictinoaryListOfBoards [boardNo][@"name"];

   cell.textLabel.text=boardName;
   return cell;
}

然后當我點擊帶有 didSelectRowIndexPath 的單元格時，我想將資料傳遞給下一個視圖控制器這是我擁有的，但我從這里丟失了。

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
    UIStoryboard *sb=[UIStoryboard storyboardWithName:@"Main" bundle:nil];
    UIViewController *vc=[sb instantiateViewControllerWithIdentifier:@"ViewController_Update_Boards"];
    vc.modalTransitionStyle= UIModalTransitionStyleFlipHorizontal;
    //[self presentViewController:vc animated:YES completion:NULL];
    [self.navigationController pushViewController:vc animated:TRUE];
}

提前致謝

uj5u.com熱心網友回復：

假設 Storyboard 中視圖控制器的自定義類已設定為ViewController_Update_Boards，并且該控制器的頭檔案類似于以下內容：

@interface ViewController_Update_Boards: UIViewController

@property (strong, nonatomic) NSString *boardName;

@end

確保你的TableViewController_My_boards班級在頂部有這個：

#import "ViewController_Update_Boards"

然后將您的didSelectRowAtIndexPath方法更改為：

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
    
    UIStoryboard *sb = [UIStoryboard storyboardWithName:@"Main" bundle:nil];
    ViewController_Update_Boards *vc = (ViewController_Update_Boards *)[sb instantiateViewControllerWithIdentifier:@"ViewController_Update_Boards"];
    NSString *boardNo =[objNSDictinoaryListOfBoards allKeys][indexPath.row];
    vc.boardName = objNSDictinoaryListOfBoards[boardNo][@"name"];
    [self.navigationController pushViewController:vc animated:TRUE];

}

標籤：目标-c 合适的视图 用户界面控制器

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