iOS UIDevice Swift

Question

我正在做一个项目，我想看看近邻探测器是否工作，以及batteryState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，我似乎得到了(Enum值)，因为我的BatteryState和ProximityState的输出总是错误的(即使是被搁置和屏幕是黑色的)。另外，如何比较BatteryState (它不是字符串)？这可能有点下流，但我只是在学斯威夫特.

Answer 1

您应该以小写字母开始命名您的函数。你应该这样做：

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
}

只有当需要通知应用程序对邻近状态的更改时，才启用邻近监视。否则，禁用邻近监视。默认值为false。 并不是所有的iOS设备都有接近传感器。若要确定是否可用邻近监视，请尝试启用它。如果proximityMonitoringEnabled属性的值仍然为假，则无法使用邻近监视。

var proximityState: Bool {
    UIDevice.currentDevice().proximityMonitoringEnabled = true

    return UIDevice.currentDevice().proximityMonitoringEnabled ? UIDevice.currentDevice().proximityState : false
}

用法：

let myBatteryStateDescription = batteryState

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

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