SwiftyStoreKit/SwiftyStoreKit-iOS-Demo/NetworkActivityIndicatorManager.swift

//
//  NetworkActivityIndicatorManager.swift
//  SwiftyStoreKit
//
//  Created by Andrea Bizzotto on 28/09/2015.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

import UIKit

class NetworkActivityIndicatorManager: NSObject {

    private static var loadingCount = 0

    class func networkOperationStarted() {

        if loadingCount == 0 {
            UIApplication.shared.isNetworkActivityIndicatorVisible = true
        }
        loadingCount += 1
    }

    class func networkOperationFinished() {
        if loadingCount > 0 {
            loadingCount -= 1
        }
        if loadingCount == 0 {
            UIApplication.shared.isNetworkActivityIndicatorVisible = false
        }
    }
}