ios - 在 TableView 中仅显示第一个单元格

Question

我在 View Controller 的 map View 之上使用了 TableView 和 TableView 单元格，我只想显示第一个单元格。我已尝试将 numberOfRowsInSection 设置为 1，这会使我的应用程序崩溃。

填充单元格和确定节中行数的数据来自核心数据。我已经成功地只显示了我想要的数据，它只是重复了一堆而不是只显示一个单元格。

我想要这个，就像我在单独的 TableView Controller 中一样:

相反，我得到了这个:

我的 cellForRowAt:

    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {

    // Configure cell
    let cell = tableView.dequeueReusableCell(withIdentifier: "MapTableViewCell") as! MapTableViewCell
    cell.thumbnailImageView.layer.cornerRadius = 10
    cell.horizontalStackView.addBackground(color: UIColor.white)

    // Get data
    var cellLocation: Location

    for location in locations {
        if location.latitude == annotation.coordinate.latitude && location.longitude == annotation.coordinate.longitude {
            cellLocation = location

    YelpClient.sharedInstance().loadImage(cellLocation.imageUrl, completionHandler: { (image) in

        performUIUpdatesOnMain {

            cell.thumbnailImageView.layer.cornerRadius = 10
            cell.thumbnailImageView.clipsToBounds = true
            cell.thumbnailImageView.image = image
            cell.nameLabel.text = cellLocation.name
            cell.priceLabel.text = cellLocation.price
            cell.displayRating(location: cellLocation)
        }

        YelpClient.sharedInstance().getOpeningHoursFromID(id: cellLocation.id, completionHandlerForOpeningHours: { (isOpenNow, error) in

            if let error = error {
                print("There was an error: \(String(describing: error))")
            }

            if let isOpenNow = isOpenNow {

                performUIUpdatesOnMain {

                    if isOpenNow {
                        cell.openLabel.text = "Open"
                        cell.openLabel.textColor = UIColor.black
                    } else {
                        cell.openLabel.text = "Closed"
                        cell.openLabel.textColor = UIColor(red: 195/255, green: 89/255, blue: 75/255, alpha: 1.0)
                        cell.openLabel.font = UIFont.systemFont(ofSize: 17.0, weight: .semibold)
                    }
                }
            }
        })
    })
        }
    }
    return cell
}

编号的行数:

    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return locations.count
}

让我知道我错过了什么。

Answer 1

创建一个只接收你想要的数据的类变量，即使它只是一个项目:

var location1Item = [location]()
locations1Item.append(locations[0]) //Or the item you want to show

现在使用 location1Item 填充 tableView

编号的行数:

func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return location1Item.count
}

cellForRowAt:

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {

    // Configure cell
    let cell = tableView.dequeueReusableCell(withIdentifier: "MapTableViewCell") as! MapTableViewCell
    cell.thumbnailImageView.layer.cornerRadius = 10
    cell.horizontalStackView.addBackground(color: UIColor.white)

    // Get data
    var cellLocation: Location

    for location in location1Item {
        if location.latitude == annotation.coordinate.latitude && location.longitude == annotation.coordinate.longitude {
            cellLocation = location

    YelpClient.sharedInstance().loadImage(cellLocation.imageUrl, completionHandler: { (image) in

        performUIUpdatesOnMain {

            cell.thumbnailImageView.layer.cornerRadius = 10
            cell.thumbnailImageView.clipsToBounds = true
            cell.thumbnailImageView.image = image
            cell.nameLabel.text = cellLocation.name
            cell.priceLabel.text = cellLocation.price
            cell.displayRating(location: cellLocation)
        }

        YelpClient.sharedInstance().getOpeningHoursFromID(id: cellLocation.id, completionHandlerForOpeningHours: { (isOpenNow, error) in

            if let error = error {
                print("There was an error: \(String(describing: error))")
            }

            if let isOpenNow = isOpenNow {

                performUIUpdatesOnMain {

                    if isOpenNow {
                        cell.openLabel.text = "Open"
                        cell.openLabel.textColor = UIColor.black
                    } else {
                        cell.openLabel.text = "Closed"
                        cell.openLabel.textColor = UIColor(red: 195/255, green: 89/255, blue: 75/255, alpha: 1.0)
                        cell.openLabel.font = UIFont.systemFont(ofSize: 17.0, weight: .semibold)
                    }
                }
            }
        })
    })
        }
    }
    return cell
}