iOS UIDevice Swift

我正在做一个项目，我想看看接近探测器是否工作，电池状态是什么。这是我的密码-

import Foundation
import UIKit

class DeviceMonitor {

    init() {
        UIDevice.currentDevice().batteryMonitoringEnabled = true
        UIDevice.currentDevice().proximityMonitoringEnabled = true

        //Loops for ease of checking
        var timer: Bool = true
        while (timer == true){
            sleep(2)
            BatteryState()
            ProximityState()
        }
    }

    func BatteryState() {
        var batterystate: UIDeviceBatteryState = UIDevice.currentDevice().batteryState
        println(batterystate)
    }

    func ProximityState() {
        var proximitystate: Bool = UIDevice.currentDevice().proximityState
        println(proximitystate)
    }
}

---

我的问题是，我似乎只是将（枚举值）作为我的BatteryState输出，而ProximityState始终为false（即使在被挂起且屏幕为黑色时）。另外，我如何比较BatteryState（它不是字符串？这可能是noobish，但我只是在学习Swift…

您应该以小写字母开头命名函数。您应该按照以下操作：

var batteryState: String {
    if UIDevice.currentDevice().batteryState == UIDeviceBatteryState.Unplugged {
        return "Unplugged"
    }
    if UIDevice.currentDevice().batteryState == UIDeviceBatteryState.Charging {
        return "Charging"
    }
    if UIDevice.currentDevice().batteryState == UIDeviceBatteryState.Full {
        return "Full"
    }
    return "Unknown"
}

var batteryCharging: Bool {
    return UIDevice.currentDevice().batteryState == UIDeviceBatteryState.Charging
}

var batteryFull: Bool {
    return UIDevice.currentDevice().batteryState == UIDeviceBatteryState.Full
}

var unPlugged: Bool {
    return UIDevice.currentDevice().batteryState == UIDeviceBatteryState.Unplugged
}

仅当需要安装应用程序时才启用接近监视 通知接近状态的更改。否则，禁用 接近监视。默认值为false

并非所有iOS设备都有接近传感器。要确定是否接近 监视可用，请尝试启用它。如果 proximityMonitoringEnabled属性仍为false，邻近性 监控不可用

用法：

let myBatteryStateDescription = batteryState

let myProximityStateDescription = proximityState ? "True" : "False" 

if proximityState {
    // do this
} else {
    // do that
} 

---

非常感谢。由于某些原因，接近状态仍然保持为false tho…很抱歉，延迟回复我，您必须在检查之前启用它

let myBatteryStateDescription = batteryState

let myProximityStateDescription = proximityState ? "True" : "False" 

if proximityState {
    // do this
} else {
    // do that
}