//
//  TFNavigationController.m
//  WXReader
//
//  Created by 谢腾飞 on 2020/12/1.
//  Copyright © 2020 xtfei_2011@126.com. All rights reserved.
//

#import "TFNavigationController.h"
#import "UINavigationController+TFExtension.h"

@interface TFNavigationController ()<UINavigationControllerDelegate>

@property (nonatomic ,assign) BOOL isSwitching;

@end

@implementation TFNavigationController

- (void)viewDidLoad
{
    [super viewDidLoad];
        
    self.delegate = self;
    
    // 使导航条有效
    [self setNavigationBarHidden:NO];
    [self.navigationBar setHidden:YES];
}

- (void)setEnableSlidingBack:(BOOL)enableSlidingBack
{
    _enableSlidingBack = enableSlidingBack;
    
    self.interactivePopGestureRecognizer.enabled = enableSlidingBack;
}

- (void)pushViewController:(UIViewController *)viewController animated:(BOOL)animated
{
    if (self.viewControllers.count > 0 && !self.isTransition) {
        viewController.hidesBottomBarWhenPushed = YES;
    }

    if (animated) {
        if (self.isSwitching) {
            return;             // 1. 如果是动画，并且正在切换，直接忽略
        }
        self.isSwitching = YES; // 2. 否则修改状态
    }
    
    [super pushViewController:viewController animated:animated];
    
    self.isSwitching = NO;
    self.isTransition = NO;
}

- (void)navigationController:(UINavigationController *)navigationController didShowViewController:(UIViewController *)viewController animated:(BOOL)animated
{
    BOOL isRootVC = viewController == navigationController.viewControllers.firstObject;
    
    if (self.enableSlidingBack) {
        self.enableSlidingBack = !isRootVC;
    }
    self.isSwitching = NO;     // 3. 还原状态
}

- (UIViewController *)popViewControllerAnimated:(BOOL)animated
{
    self.isSwitching = NO;
    
    return [super popViewControllerAnimated:animated];
}

@end