navigationController背景图,文字，事件定义

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//设置背景图片

[self.navigationController.navigationBar setBackgroundImage:imag forBarMetrics:UIBarMetricsDefault];

//button 定义你要的背景 文字 或 事件

 UIBarButtonItem *leftBarButton = [[UIBarButtonItem alloc] initWithCustomView:button];

 self.navigationItem.leftBarButtonItem = leftBarButton;

 [leftBarButton release];

具体实现：

[self.navigationItem setTitle:@"通知详情"];

    //self.navigationController.navigationBarHidden = NO;

    [self.navigationController.navigationBar setBackgroundImage:[UIImage imageNamed:@"root_top.png"] forBarMetrics:UIBarMetricsDefault];

    self.navigationItem.hidesBackButton = YES;

    UIButton *rightButton = [[UIButton alloc]initWithFrame:CGRectMake(SCREEN_WIDTH - 70, 10, 70, rootTopHeight - 20)];

    [rightButton addTarget:self action:@selector(NoticeBackAction) forControlEvents:UIControlEventTouchUpInside];

    [rightButton setBackgroundImage:[UIImage imageNamed:@"root_back.png"] forState:UIControlStateNormal];

    [rightButton setTitle:@"退出" forState:UIControlStateNormal];

    UIBarButtonItem *rightBarButton = [[UIBarButtonItem alloc]initWithCustomView:rightButton];

    self.navigationItem.rightBarButtonItem = rightBarButton;

navigationController背景图,文字，事件定义

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原文地址：http://www.cnblogs.com/littlewrong/p/4909015.html