怎么 遍历 characteristic
时间: 2023-08-23 09:04:47 浏览: 33
要遍历一个characteristic,你需要先获取它所属的service,然后再遍历service下的所有characteristic。以下是一个示例代码:
```
func discoverCharacteristics(for service: CBService) {
peripheral.discoverCharacteristics(nil, for: service)
}
func peripheral(_ peripheral: CBPeripheral, didDiscoverCharacteristicsFor service: CBService, error: Error?) {
guard error == nil else {
print("Error discovering characteristics: \(error!.localizedDescription)")
return
}
guard let characteristics = service.characteristics else {
print("No characteristics found for service: \(service.uuid.uuidString)")
return
}
// 遍历所有的characteristics
for characteristic in characteristics {
print("Found characteristic: \(characteristic.uuid.uuidString)")
// 进行你想要的操作
// ...
}
}
```
在上面的代码中,我们首先调用`peripheral.discoverCharacteristics`方法来发现一个service下的所有characteristic。然后在`peripheral(_:didDiscoverCharacteristicsFor:error:)`回调方法中,我们检查是否有错误发生,然后遍历所有的characteristics并对它们进行操作。