iOS 獲取電池狀態

UIDeviceBatteryState deviceBatteryState = [UIDevice currentDevice].batteryState;
if (deviceBatteryState == UIDeviceBatteryStateCharging || deviceBatteryState == UIDeviceBatteryStateFull) {
    // It is charging
}

typedef enum {
   UIDeviceBatteryStateUnknown,
   UIDeviceBatteryStateUnplugged,
   UIDeviceBatteryStateCharging,
   UIDeviceBatteryStateFull,
} UIDeviceBatteryState;