ios ble 在 Swift fatal error : Index out of range 中使用 tableview 连接多个设备

Question

我想展示关于未连接和已连接的两个部分 我的 swift 不是很好。

这是我的代码 https://www.codepile.net/pile/vNYKLZ6L

当我运行它时，它会在这里崩溃 let peripheral = self.peripherals[indexPath.row]

fatal error: Index out of range

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    //Connect to device where the peripheral is connected
    let cell = tableView.dequeueReusableCell(withIdentifier: "BlueCell") as! PeripheralTableViewCell
    let peripheral = self.peripherals[indexPath.row]
    //let RSSI = self.RSSIs[indexPath.row]

    if indexPath.section == 0 {
        if peripheral.name == nil {
           cell.peripheralLabel?.text = "nil"
        } else {
           cell.peripheralLabel?.text = peripheral.name
        }
    } else {
       if connectPeripherals.count == 0 {
          cell.peripheralLabel?.text = "nil"
       } else {            
          cell.peripheralLabel?.text = self.connectPeripherals[indexPath.row].name
       }
    }

    //cell.rssiLabel.text = "RSSI: \(RSSI)"
    print("tableview連線有\(connectPeripherals.count)個")
    print("tableview未連線有\(peripherals.count)個")

    return cell
}

这里是 numberOfRowsInSection 函数

func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    if section == 0{
        return self.peripherals.count
    } else {
        return self.connectPeripherals.count
    }
}

Answer 1

据我所知，peripherals 在 section_0 上，connect Peripherals 在 section_1 上，因此您可以这样重新组织代码:

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: "BlueCell") as! PeripheralTableViewCell

    if indexPath.section == 0 {
        let peripheral = self.peripherals[indexPath.row]
        cell.peripheralLabel?.text = peripheral.name != nil ? peripheral.name : "nil"
    } else {
        let connectedPeripheral = self.connectPeripherals[indexPath.row]
        cell.peripheralLabel?.text = connectedPeripheral.name != nil ? connectedPeripheral.name : "nil"
    }

    print("tableview連線有\(connectPeripherals.count)個")
    print("tableview未連線有\(peripherals.count)個")
    return cell
}