自定义可以侧滑返回的navigation

#import "NDNavigationController.h"

@interface NDNavigationController ()<UINavigationControllerDelegate, UIGestureRecognizerDelegate>
@property(nonatomic, weak) UIViewController *currentShowVC;
@end

@implementation NDNavigationController

- (void)viewDidLoad {
[super viewDidLoad];

}

- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];

}

- (instancetype)initWithRootViewController:(UIViewController *)rootViewController {

if (self = [super initWithRootViewController:rootViewController]) {
self.delegate = self;
self.interactivePopGestureRecognizer.delegate = self;
//
设置navigationBar的背景颜色，根据需要自己设置
self.navigationBar.barTintColor = kTabBarColor;

// 设置navigationBar是否透明，不透明的话会使可用界面原点下移（0，0）点为导航栏左下角下方的那个点
self.navigationBar.translucent = NO;
//
设置navigationBar是不是使用系统默认返回，默认为YES
self.interactivePopGestureRecognizer.enabled = YES;
//
设置navigationBar元素的背景颜色，不包括title
self.navigationBar.tintColor = KCommentColor;
//
设置navigationController的title的字体颜色
NSDictionary * dict=[NSDictionary dictionaryWithObject:kMainBlackColor forKey:NSForegroundColorAttributeName];
self.navigationBar.titleTextAttributes = dict;

//
统一替换 back item
的图片
UIImage * image = [UIImage imageNamed:@"com_navigatin_back_bt"];
image = [image imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
[self.navigationBar setBackIndicatorImage:image];
[self.navigationBar setBackIndicatorTransitionMaskImage:image];
}

return self;
}

- (void)navigationController:(UINavigationController *)navigationController didShowViewController:(UIViewController *)viewController animated:(BOOL)animated {
if (1 == navigationController.viewControllers.count) {
self.currentShowVC = nil;
} else {
self.currentShowVC = viewController;
}
}

- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer {
if (gestureRecognizer == self.interactivePopGestureRecognizer) {
return (self.currentShowVC == self.topViewController);
}
return YES;
}

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer
{
if ([gestureRecognizer isKindOfClass:[UIPanGestureRecognizer class]] &&
[otherGestureRecognizer isKindOfClass:[UIScreenEdgePanGestureRecognizer class]]) {
return YES;
} else {
return NO;
}
}
//解决：手指在滑动的时候，被 pop
的 ViewController
中的 UIScrollView 会跟着一起滚动
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldBeRequiredToFailByGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer
{
return [gestureRecognizer isKindOfClass:UIScreenEdgePanGestureRecognizer.class];
}
@end