导航控制器ZJBaseNaviController+导航栏返回按钮点击事件拦截

#import <UIKit/UIKit.h>
@interface ZJBaseNaviController : UINavigationController
@end

#import "ZJBaseNaviController.h"#import "UIViewController+BackButtonHandler.h"@interface ZJBaseNaviController ()<UIGestureRecognizerDelegate>@end
@implementation ZJBaseNaviController#pragma mark - 初始化/** 只加载一次 */+(void)load{    UINavigationBar *navBar = [UINavigationBar appearance];    // 导航栏颜色    navBar.barTintColor = [UIColor whiteColor];    // 导航栏是否有透明效果    navBar.translucent = NO;    // 导航栏分割线    navBar.shadowImage = [UIImage new];    // 导航栏字体颜色    NSMutableDictionary * param = [NSMutableDictionary new];    [param setObject:[UIFont systemFontOfSize:17] forKey:NSFontAttributeName];    [param setObject:[UIColor redColor] forKey:NSForegroundColorAttributeName];    [navBar setTitleTextAttributes:param];}- (void)viewDidLoad {    [super viewDidLoad];    // Do any additional setup after loading the view.    // 滑动手势    if ([self respondsToSelector:@selector(interactivePopGestureRecognizer)]) {        self.interactivePopGestureRecognizer.delegate = self;    }}#pragma mark - UIGestureRecognizerDelegate-(BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch{    //是否出发手势    return self.childViewControllers.count > 1;}
-(void)pushViewController:(UIViewController *)viewController animated:(BOOL)animated{    if(self.childViewControllers.count>0){        viewController.navigationController.title = @"";        viewController.hidesBottomBarWhenPushed = YES;        CGRect tempFrame = CGRectMake(0, 0, 40, 40);        UIButton * button = [[UIButton alloc] initWithFrame:tempFrame];        [button setImageEdgeInsets:UIEdgeInsetsMake(0, -10, 0, 10)];        [button setImage:[UIImage imageNamed:@"arrow_left"] forState:UIControlStateNormal];        [button addTarget:self action:@selector(backBeforViewController) forControlEvents:UIControlEventTouchUpInside];        UIBarButtonItem * leftItem = [[UIBarButtonItem alloc] initWithCustomView:button];        viewController.navigationItem.leftBarButtonItem = leftItem;    }    [super pushViewController:viewController animated:animated];}-(void)backBeforViewController{    BOOL shouldPop = YES;    UIViewController * tempViewController = [self topViewController];    if([tempViewController respondsToSelector:@selector(navigationShouldPopOnBackButton)]) {        shouldPop = [tempViewController navigationShouldPopOnBackButton];    }    if(shouldPop){        [self popViewControllerAnimated:YES];    }}@end