自定义导航栏的返回按钮(xcode)

导航栏的按钮，右边的按钮是可以自己随意添加的。但左边的返回按钮怎么定制？你会说，添加一个自己的按钮呗！你可以试试看，这样行不行。

正确的答案是重载UINavigationController类的pushViewController:animated方法。

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#import <UIKit/UIKit.h>

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<a href="http://my.oschina.net/interface" class="referer"target="_blank">@interface</a> MyNavigationController: UINavigationController {

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}

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<a href="http://my.oschina.net/end" class="referer" target="_blank">@end</a>

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#import "MyNavigationController.h"

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@implementation MyNavigationController

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-(void)popself

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{

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    [self popViewControllerAnimated:YES];

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}

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-(UIBarButtonItem*) createBackButton

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{ 

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return [[UIBarButtonItem alloc]

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initWithTitle:@"返回"

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style:UIBarButtonItemStyleBordered

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target:self

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action:@selector(popself)];

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} 

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- (void)pushViewController:(UIViewController *)viewController animated:(BOOL)animated 

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{ 

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    [super pushViewController:viewControlleranimated:animated]; 

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if (viewController.navigationItem.leftBarButtonItem== nil && [self.viewControllers count] > 1) { 

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        viewController.navigationItem.leftBarButtonItem =[self createBackButton];

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    } 

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} 

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@end