//
//  UIViewController_Addition.swift
//  PaiAi
//
//  Created by mac on 16/7/21.
//  Copyright © 2016年 FFIB. All rights reserved.
//

import UIKit

extension UIViewController{
    var rightBarAction: Selector? {
        get {
            return navigationItem.leftBarButtonItem?.action
        }
        set {
            navigationItem.setRightBars(buttonSpace: 0,
                                        images: [UIImage(named: "更多-右上角-1")],
                                        actions: [newValue!],
                                        target: self)
        }
    }
    
    var titleWithbackBar: String {
        get {
            return navigationItem.title ?? ""
        }
        set {
            navigationItem.setLeftBars(buttonSpace: 0,
                                       images: [UIImage(named: "back")],
                                       actions: [#selector(backToController)],
                                       target: self)
            navigationController?.delegate = self
            navigationController?.interactivePopGestureRecognizer?.delegate = self
            navigationItem.title = newValue
            navigationController?.interactivePopGestureRecognizer?.isEnabled = true
        }
    }
    
    @objc open func backToController() {
        popController()
    }
}

extension UIViewController: UINavigationControllerDelegate, UIGestureRecognizerDelegate {
    public func gestureRecognizerShouldBegin(_ gestureRecognizer: UIGestureRecognizer) -> Bool {
        if (navigationController?.viewControllers.count ?? 0) <= 1,
            gestureRecognizer == navigationController?.interactivePopGestureRecognizer {
            return false
        }
        return true
    }
}