//
//  UINavigationBar+Custom.m
//  GIGA
//
//  Created by lianxiang on 2018/8/13.
//  Copyright © 2018年 com.giga.ios. All rights reserved.
//
#import <objc/runtime.h>
#import "UINavigationBar+Custom.h"
static char overlayKey;

@implementation UINavigationBar (Custom)
- (UIView *)overlay
{
    return objc_getAssociatedObject(self, &overlayKey);
}

- (void)setOverlay:(UIView *)overlay
{
    objc_setAssociatedObject(self, &overlayKey, overlay, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}

- (void)cnSetBackgroundColor:(UIColor *)backgroundColor
{
    if (!self.overlay) {
        [self setBackgroundImage:[UIImage new] forBarMetrics:UIBarMetricsDefault];
        self.overlay = [[UIView alloc] initWithFrame:CGRectMake(0, -PhoneX_STATUBAR_H, [UIScreen mainScreen].bounds.size.width, CGRectGetHeight(self.bounds) + PhoneX_STATUBAR_H)];
        self.overlay.userInteractionEnabled = NO;
        self.overlay.autoresizingMask = UIViewAutoresizingFlexibleWidth|UIViewAutoresizingFlexibleHeight;
        [self insertSubview:self.overlay atIndex:0];
    }
    
    self.overlay.backgroundColor = [backgroundColor colorWithAlphaComponent:0.2];
    
}

- (void)cnReset
{
    
    [self setBackgroundImage:[[UIImage alloc] init] forBarMetrics:UIBarMetricsDefault];
    [self.overlay removeFromSuperview];
    self.overlay = nil;
}

-(void)setClearNav
{
    
    [self setBackgroundImage:[[UIImage alloc] init] forBarMetrics:UIBarMetricsDefault];
    //设置那条横线直接隐藏
    self.shadowImage = [[UIImage alloc] init];
    if (self.overlay) {
        [self.overlay removeFromSuperview];
        self.overlay = nil;
    }
    
}

-(void)setBackgroundImage{
    
    [self setBackgroundImage:[UIImage imageNamed:@"nav_red_moment"] forBarMetrics:UIBarMetricsDefault];
    
}

@end