ios - CoreBluetooth用字节数组写入数据

Question

我目前正在尝试使用corebluetooth从Central向Peripheral发送7bytes的数据，我的代码如下:

func peripheral(peripheral: CBPeripheral, didDiscoverCharacteristicsForService service: CBService, error: NSError?) {

connectingPeripheral = peripheral
for characteristic in service.characteristics as [CBCharacteristic]!{ 

if characteristic.UUID.UUIDString == "2AF2"{
    connectingCharacteristicWrite = characteristic
}

@IBAction func Button(sender: UIButton) {
    let value: [UInt8] = [0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07]
    let data = NSData(bytes: value, length: 7)
    peripheral.setNotifyValue(true, forCharacteristic: characteristic)
    connectingPeripheral.writeValue(data, forCharacteristic: connectingCharacteristicWrite, type: CBCharacteristicWriteType.WithoutResponse)
}

但是我只能发送一个字节。我尝试下面的代码行:

let value: [UInt8] = [0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07]
let data = NSData(bytes: value, length: 7)
connectingPeripheral.writeValue(data, forCharacteristic: connectingCharacteristicWrite, type: CBCharacteristicWriteType.WithResponse)

但仍然无法发送数据。有人知道为什么吗？

Answer 1

这是Swift 5的稍微修改的解决方案

let value: [UInt8] = [0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07]
connectingPeripheral.writeValue(Data(value), for: connectingCharacteristicWrite, type: .withResponse)