---

隱藏導航欄底部的線條
辦法1 (單頁面設置)

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

假如不想影響其他頁面的導航通明度，viewWillDisappear將其設置為nil即可:

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

辦法2(全局設置)

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

[[UINavigationBar appearance] setShadowImage:[[UIImage alloc] init]];

辦法3

self.navigationController.navigationBar.clipsToBounds = YES;

設置導航欄底部線條顏色的代碼：

UINavigationBar *navigationBar = self.navigationController.navigationBar; 
[navigationBar setBackgroundImage:[[UIImage alloc] init] forBarPosition:UIBarPositionAny barMetrics:UIBarMetricsDefault]; //此處使底部線條顏色為白色
[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

修復navigationController側滑封閉生效的問題

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

隱藏前往按鈕前面的文字

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

本文轉自: http://www.jianshu.com/p/aa547432eae0

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