iOS应用开发 - 导航栏系统边缘侧滑返回更改为全屏侧滑

#import "LyonNavigationController.h"

@interface LyonNavigationController ()<UIGestureRecognizerDelegate>

@end

@implementation LyonNavigationController

//  BUG:(实现自定义返回按钮覆盖掉系统按钮 要求还原导航栏自带的滑动返回手势功能)
//  如果单单在viewDidLoad方法中设置
//  self.interactivePopGestureRecognizer.delegate = nil;
//  虽然还原了滑动手势，但是存在根控制器的也有滑动手势的bug

//  解决方法:
//  在viewDidLoad方法中

//  1. 将系统自带滑动手势代理赋给变量
//  self.temDelegate = self.interactivePopGestureRecognizer.delegate;
//  2.设置navigationcontroller的代理方法
//  self.delegate = self;

//  3.在push代理方法中还原滑动手势
//  self.interactivePopGestureRecognizer.delegate ＝ nil;
//  4.设置navigationcontroller的代理方法，在didshow为根控制器的时候设置返回手势失效
//  self.interactivePopGestureRecognizer.delegate = self.temDelegate;

- (void)viewDidLoad {
    [super viewDidLoad];
    
    //  防止手势冲突
    self.interactivePopGestureRecognizer.enabled = NO;



    // handleNavigationTransition: 为系统手势触发方法
      //  1.  NSLog(@"%@",self.interactivePopGestureRecogniz);滑动的手势
      //  2.  输出代理，获取handleNavigationTransition:方法
    // 可通过运行时（RunTime.h）获取手势方法属性列表
    // 通过_target属性使用 kvc 获取target对象
      //  1. 由于target 等于 self.interactivePopGestureRecognizer.delegate
      //  2. 所以本文使用 self.interactivePopGestureRecognizer.delegate


#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wundeclared-selector"
// 被夹在这中间的代码针对于此警告都会无视并且不显示出来
    UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc] initWithTarget:self.interactivePopGestureRecognizer.delegate action:@selector(handleNavigationTransition:)];
#pragma clang diagnostic pop

    pan.delegate = self;

    [self.view addGestureRecognizer:pan];
  
}


#pragma mark - 手势代理方法

// 是否开始触发手势
- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer
{
    
    // 判断下当前控制器是否是跟控制器
    return (self.topViewController != [self.viewControllers firstObject]);
    
}

- (void)pushViewController:(UIViewController *)viewController animated:(BOOL)animated
{
    if (self.viewControllers.count != 0) {

        viewController.hidesBottomBarWhenPushed = YES;
    }

    [super pushViewController:viewController animated:animated];
}

@end