Question

我想自动选择中间单元格。如果我选择开始时间和结束时间，就像屏幕截图那样，我选择01:00 为开始时间和 06:00 为结束时间。我想选择自动选择时间 02：00,03：00,04：00,05：00 ，这是示例......

也许我的客户想要选择 01:00作为开始时间而 21:00 作为结束时间，自动< / strong>应始终选择。

我有三个时间范围，我需要为工作和每个范围时间显示不同时间 我有三个价格。例如：

第一次和价格为早晨。

第二次和价格为天。

第三次和价格为晚上。

我可以做，怎么做？也许有框架这将帮助我做到这一点快速？

我的代码在这里：

class BookingViewController: UIViewController, UICollectionViewDelegate, UICollectionViewDataSource { var bookingHall: Halls? var timeIntervalArray: [String] = [] var timeIntervalArrayTwo: [String] = [] var timeIntervalArrayThree: [String] = [] var selectedTimeIntervalArray: [String] = [] var bookingAmountOfHallArray: [Int] = [] var sumOfBookingAmount: Int = 0 var allArrayTimesAndPrices: [(time: String, price: Int)] = [] // ARRAY FOR COLLECT ALL TIMES AND ALL PRICES lazy var timeFormatter: DateFormatter = { let formatter = DateFormatter() formatter.dateFormat = "HH:mm" return formatter }() override func viewDidLoad() { super.viewDidLoad() configureSelectedDateAndTime() collectionView.allowsMultipleSelection = true // MORNING TIME RANGE if let timeRange = generateTimeRange() { self.timeIntervalArray = timeRange self.collectionView.reloadData() } else { // Handle error } // DAY TIME RANGE if let timeRangeTwo = generateTimeRangeTwo() { self.timeIntervalArrayTwo = timeRangeTwo self.collectionView.reloadData() } else { // Handle error } // EVENING TIME RANGE if let timeRangeThree = generateTimeRangeThree() { self.timeIntervalArrayThree = timeRangeThree self.collectionView.reloadData() } else { // Handle error } if let hall = bookingHall { allArrayTimesAndPrices = timeIntervalArray.map({ (time: $0, price: hall.price) }) + timeIntervalArrayTwo.map({ (time: $0, price: hall.priceSecond) }) + timeIntervalArrayThree.map({ (time: $0, price: hall.priceThird) }) } } func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int { return allArrayTimesAndPrices.count } func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell { let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "timeCell", for: indexPath) as! BookingTimeCell cell.timeLabel.text = allArrayTimesAndPrices[indexPath.item].time cell.priceLabel.text = "\(allArrayTimesAndPrices[indexPath.item].price) руб." return cell } func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) { let selectedCell = collectionView.cellForItem(at: indexPath) selectedIndexesAndBackgroundColor(cell: selectedCell!, indexPath: inde xPath) } func collectionView(_ collectionView: UICollectionView, didDeselectItemAt indexPath: IndexPath) { let deselectedCell = collectionView.cellForItem(at: indexPath) deselectedIndexesAndBackgroundColor(cell: deselectedCell!, indexPath: indexPath) } // the selected time func selectedIndexesAndBackgroundColor(cell: UICollectionViewCell, indexPath: IndexPath) { let timeToAdd = allArrayTimesAndPrices[indexPath.item].time selectedTimeIntervalArray.append(timeToAdd) } // cancelled time func deselectedIndexesAndBackgroundColor(cell: UICollectionViewCell, indexPath: IndexPath) { let timeToRemove = allArrayTimesAndPrices[indexPath.item].time let indexTime = selectedTimeIntervalArray.index(of: timeToRemove) selectedTimeIntervalArray.remove(at: indexTime!) } // MORNING func generateTimeRange() -> [String]? { var result = [String]() if let hall = bookingHall { guard var startTime = timeFormatter.date(from: hall.firstStartTimeToIncreasePrice) else { return nil } guard let endTime = timeFormatter.date(from: hall.firstEndTimeToIncreasePrice) else { return nil } while startTime <= endTime { result.append(timeFormatter.string(from: startTime)) startTime = Calendar.current.date(byAdding: .hour, value: 1, to: startTime)! } } return result } // DAY func generateTimeRangeTwo() -> [String]? { var result = [String]() if let hall = bookingHall { guard var startTime = timeFormatter.date(from: hall.secondStartTimeToIncreasePrice) else { return nil } guard let endTime = timeFormatter.date(from: hall.secondEndTimeToIncreasePrice) else { return nil } while startTime <= endTime { result.append(timeFormatter.string(from: startTime)) startTime = Calendar.current.date(byAdding: .hour, value: 1, to: startTime)! } } return result } // EVENING func generateTimeRangeThree() -> [String]? { var result = [String]() if let hall = bookingHall { guard var startTime = timeFormatter.date(from: hall.thirdStartTimeToIncreasePrice) else { return nil } guard let endTime = timeFormatter.date(from: hall.thirdEndTimeToIncreasePrice) else { return nil } while startTime <= endTime { result.append(timeFormatter.string(from: startTime)) startTime = Calendar.current.date(byAdding: .hour, value: 1, to: startTime)! } } return result } }

Answer 1

为indexPaths提供两个全局对象

var selectedRowOne:IndexPath? <br>
var selectedRowTwo:Indexpath?

之后在didSelectItemAt

   if selectedRowOne == nil {
        // Start of range is empty !!

        selectedRowOne = indexPath;
        // Logic for select the row
    } else if selectedRowTwo == nil {
        // End of range is empty
        selectedRowTwo = indexPath

        var indexPathToBeSelected :[IndexPath] = []

        for i in selectedRowOne!.row  ..< selectedRowTwo!.row {
            indexPathToBeSelected.append(IndexPath(item: i, section: 0))
        }

        // Select indexPathToBeSelected logic
    }

由于您的代码太混乱，我无法为一个案例编写代码。所以现在您必须管理一个案例，其中选择了selectedRowOne和selectedRowTwo并且用户点击任何单元格。

然后您必须检查选择indexpath.row <selectedRowOne.row然后selectedRowOne = indexpath

其次else if indexpath.row > selectedRowOne.row && indexpath.row < selectedRowTwo.row然后selectedRowOne = indexpath

并且在最后条件

else if indexpath.row > selectedRowTwo.row 然后selectedRowTwo = indexpath

然后在selectedRowOne和selectedRowTwo

之间应用单元格选择逻辑如果选择了两个单元格，如果我取消选择第一个或第二个单元格，则需要正确管理selectedRowOne和selectedRowTwo

希望它对你有所帮助

Answer 2

在全局属性下创建：

var selectedIndexPath:IndexPath! // store selected indexpath

var arrSelectedIndexPath = [IndexPath]() // array of selected indexpath

之后

extension ViewController: UICollectionViewDelegate, UICollectionViewDataSource, UICollectionViewDelegateFlowLayout {

func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
    return timeArray.count
}

// -------------------------------------------------------------------------------------------

func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
    return CGSize(width: (self.view.frame.size.width - 60) / 7, height: (self.view.frame.size.width - 60) / 7)
}

// -------------------------------------------------------------------------------------------

func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {

    // dequeue cell
    let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath) as! CollectionViewCell

    // assign text to label
    cell.lblTitle.text = self.timeArray[indexPath.item]

    if self.arrSelectedIndexPath.contains(indexPath) {// if arrSelectedIndexPath contain indexpath then change backgrond color of label

        cell.lblTitle.backgroundColor = UIColor(red: 81.0/255.0, green: 182.0/255.0, blue: 186.0/255.0, alpha: 1.0)

    }else { // else set it to default color white

        cell.lblTitle.backgroundColor = UIColor.white

    }

    // return collection view cell
    return cell
}

// -------------------------------------------------------------------------------------------

func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {

    if self.selectedIndexPath == nil { // if selected indexpath nil then assign first indexpath

        self.selectedIndexPath = indexPath
        self.arrSelectedIndexPath.removeAll() // remove all items from array
        self.collectionView.reloadData() // reload CollectionView

    }else {

        if self.arrSelectedIndexPath.count == 0 { // if arrSelectedIndexPath.count == 0 then

            if self.selectedIndexPath.item < indexPath.item { // check first selected indexpath is smaller then end indexpath

                // fill all intermediate cell
                for i in self.selectedIndexPath.item...indexPath.item {
                    self.arrSelectedIndexPath.append(NSIndexPath(item: i, section: 0) as IndexPath)
                }

                // reload collection view and update background color
                self.collectionView.reloadData()

                // reset first selected indexpath
                self.selectedIndexPath = nil

            }else { // else select first selected indexpath

                self.selectedIndexPath = indexPath

            }

        }else { // else remove all items from

            self.arrSelectedIndexPath.removeAll()
            self.collectionView.reloadData()
            self.selectedIndexPath = indexPath

        }

    }
}

// -------------------------------------------------------------------------------------------

}

希望它适合你！

Answer 3

创建一个属性来存储selectedIndexPath var selectedItem: IndexPath?，然后为第一个选定的项目分配它的值。

func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {

    guard let selectedItem = selectedItem else{
        selectedItem = indexPath
        return
    }

    //loop for selecting items between current selected item and previous selected item.
    for i in selectedItem.row...indexPath.row {
         let selectedCell = collectionView.cellForItem(at: IndexPath(row: i, section: indexPath.section))
         selectedIndexesAndBackgroundColor(cell: selectedCell!, indexPath: inde xPath)
    }        

}

并在didDeSelectItemAt中执行相同操作，以便相应地取消选择项目。

在CollectionView中自动选择中间单元格

3 个答案: