获取ios系统的电池电量比例，是否充电中，是否充满

    // Find the battery level
    @try {
        // Get the device
        UIDevice *Device = [UIDevice currentDevice];
        // Set battery monitoring on
        Device.batteryMonitoringEnabled = YES;
        
        // Set up the battery level float
        float BatteryLevel = 0.0;
        // Get the battery level
        float BatteryCharge = [Device batteryLevel];
        
        // Check to make sure the battery level is more than zero
        if (BatteryCharge > 0.0f) {
            // Make the battery level float equal to the charge * 100
            BatteryLevel = BatteryCharge * 100;
        } else {
            // Unable to find the battery level
            return -1;
        }
        
        // Output the battery level
        return BatteryLevel;
    }
    @catch (NSException *exception) {
        // Error out
        return -1;
    }

// is charging
    @try {
        // Get the device
        UIDevice *Device = [UIDevice currentDevice];
        // Set battery monitoring on
        Device.batteryMonitoringEnabled = YES;
        
        // Check the battery state
        if ([Device batteryState] == UIDeviceBatteryStateCharging || [Device batteryState] == UIDeviceBatteryStateFull) {
            // Device is charging
            return true;
        } else {
            // Device is not charging
            return false;
        }
    }
    @catch (NSException *exception) {
        // Error out
        return false;
    }