把导航栏和图片无缝连接_html怎么让图片接着导航下面显示

//    导航栏和图片无缝兼容
    self.navigationController.navigationBar.translucent = YES;
    
    UIColor *color = [UIColor clearColor];
    
    CGRect rect = CGRectMake(0.f, 0.f, self.view.frame.size.width, 64.f);
    
//    画图获取一个透明图片设给导航栏
    UIGraphicsBeginImageContext(rect.size);
    
    CGContextRef context = UIGraphicsGetCurrentContext();
    
    CGContextSetFillColorWithColor(context, [color CGColor]);
    
    CGContextFillRect(context, rect);
    
    UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
    
    UIGraphicsEndImageContext();
    
    [self.navigationController.navigationBar setBackgroundImage:image forBarMetrics:UIBarMetricsDefault];
    
    self.navigationController.navigationBar.clipsToBounds = NO;
    
//    把导航栏底部黑线去掉

    self.navigationController.navigationBar.shadowImage = [[UIImage alloc] init];