UINavigationController--隐藏下方横线

隐藏导航栏底部的线条
方法1 (单页面设置)

 [self.navigationController.navigationBar setBackgroundImage:[UIImage new] forBarMetrics:UIBarMetricsDefault];
 [self.navigationController.navigationBar setShadowImage:[UIImage new]];

 
若是不想影响其余页面的导航透明度，viewWillDisappear将其设置为nil便可:
 
 

[self.navigationController.navigationBar setBackgroundImage:nil forBarMetrics:UIBarMetricsDefault];
[self.navigationController.navigationBar setShadowImage:nil];

方法2(全局设置)

[[UINavigationBar appearance] setBackgroundImage:[[UIImage alloc] init] forBarMetrics:UIBarMetricsDefault];
[[UINavigationBar appearance] setShadowImage:[[UIImage alloc] init]];

方法3

self.navigationController.navigationBar.clipsToBounds = YES;

 
设置导航栏底部线条颜色的代码：

UINavigationBar *navigationBar = self.navigationController.navigationBar; 
[navigationBar setBackgroundImage:[[UIImage alloc] init] forBarPosition:UIBarPositionAny barMetrics:UIBarMetricsDefault]; //此处使底部线条颜色为红色
[navigationBar setShadowImage:[UIImage imageWithColor:[UIColor redColor]]];

@implementation UIImage (ColorImage)

+ (UIImage *)imageWithColor:(UIColor *)color{ 
  CGRect rect = CGRectMake(0.0f, 0.0f, 1.0f, 1.0f); 
  UIGraphicsBeginImageContext(rect.size); 
  CGContextRef context = UIGraphicsGetCurrentContext(); 
  CGContextSetFillColorWithColor(context, [color CGColor]); 
  CGContextFillRect(context, rect); 
  UIImage *image = UIGraphicsGetImageFromCurrentImageContext(); 
  UIGraphicsEndImageContext(); return image;
}
@end

修复navigationController侧滑关闭失效的问题

self.navigationController.interactivePopGestureRecognizer.delegate = (id)self;

 
隐藏返回按钮后面的文字

 [[UIBarButtonItem appearance] setBackButtonTitlePositionAdjustment:UIOffsetMake(0, -60)
                                                         forBarMetrics:UIBarMetricsDefault];

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做者：wuWuJK 
来源：CSDN 
原文：https://blog.csdn.net/wujakf/article/details/78584325 
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