//是否开启监测电池状态 开启后 才可以正常获取电池状态
UIDevice.current.isBatteryMonitoringEnabled = true
//电源连接状态
let batteryState = UIDevice.current.batteryState
//是否充电
let batteryCharging = ( batteryState ==UIDevice.BatteryState.full|| batteryState ==UIDevice.BatteryState.charging)
//关闭电池状态
UIDevice.current.isBatteryMonitoringEnabled = false
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