#import <UIKit/UIKit.h>

#pragma mark Catalog Property Synthesize Support
#import <objc/runtime.h>
#define SYNTHESIZE_CATALOG_OBJ_PROPERTY(propertyGetter, propertySetter)
- (id) propertyGetter {
return objc_getAssociatedObject(self, @selector( propertyGetter ));
}
- (void) propertySetter (id)obj{
objc_setAssociatedObject(self, @selector( propertyGetter ), obj, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}


#define SYNTHESIZE_CATALOG_VALUE_PROPERTY(valueType, propertyGetter, propertySetter)
- (valueType) propertyGetter {
valueType ret = {0};
[objc_getAssociatedObject(self, @selector( propertyGetter )) getValue:&ret];
return ret;
}
- (void) propertySetter (valueType)value{
NSValue *valueObj = [NSValue valueWithBytes:&value objCType:@encode(valueType)];
objc_setAssociatedObject(self, @selector( propertyGetter ), valueObj, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}

@interface UIViewController (NavigationBar)
@property(nonatomic,assign) BOOL needBarHide;
- (BOOL)checkPreviousControllerHideFlagInViewWillDisappear;
@end

@implementation UIViewController (NavigationBar)
SYNTHESIZE_CATALOG_VALUE_PROPERTY(BOOL, needBarHide, setNeedBarHide:)

- (BOOL)checkPreviousControllerHideFlagInViewWillDisappear
{
    BOOL lastVCFlag =  [self.navigationController.viewControllers lastObject].needBarHide;
    return lastVCFlag;
}
@end

@implementation RedViewController

- (instancetype)initWithCoder:(NSCoder *)aDecoder
{
    self = [super initWithCoder:aDecoder];
    if (self)
    {
        self.needBarHide = YES;
    }
    return self;
}

- (instancetype) initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nil];
    if (self)
    {
        self.needBarHide = YES;
    }
    return self;
}


- (void)viewWillAppear:(BOOL)animated
{
    [super viewWillAppear:animated];
    [self.navigationController setNavigationBarHidden:YES animated:YES];
    self.delegateObject = self.navigationController.interactivePopGestureRecognizer.delegate;
    self.navigationController.interactivePopGestureRecognizer.delegate = self;
}

- (void)viewWillDisappear:(BOOL)animated
{
    [super viewWillDisappear:animated];

    BOOL hide = [self checkPreviousControllerHideFlagInViewWillDisappear];
    [self.navigationController setNavigationBarHidden:hide animated:YES];
    NSLog(@"red viewWillDisappear hide:%d",hide);

    self.navigationController.interactivePopGestureRecognizer.delegate = self.delegateObject;
}

@end