[UINavigationBar appearance].backIndicatorTransitionMaskImage = [UIImage imageNamed:@"backArrowMask.png"];

    [UINavigationBar appearance].backIndicatorImage = [UIImage imageNamed:@"icon_arrowback_n”];

 

icon_arrowback_n 大小为@2x = 42* 42

 

 

自定义返回按钮会造成返回手势不能使用，解决方法

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///处理自定义返回按钮后不能侧滑 @interface  RootNavigationController : UINavigationController   @end

　　

@interface RootNavigationController : UINavigationController @end @implementation RootNavigationController - (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view.  self.interactivePopGestureRecognizer.delegate = self; } - (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer { if (self.childViewControllers.count == 1) { return NO; } return YES; }