ios之自定义导航栏上的返回按钮

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。

#import <UIKit/UIKit.h>

@interface MyNavigationController: UINavigationController {

}

@end

 

#import "MyNavigationController.h"

 

@implementation MyNavigationController

-(void)popself

{

    [self popViewControllerAnimated:YES];

}

-(UIBarButtonItem*) createBackButton

{ 

return [[UIBarButtonItem alloc]

initWithTitle:@"返回"

style:UIBarButtonItemStyleBordered

target:self

action:@selector(popself)];

} 

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

{ 

    [super pushViewController:viewControlleranimated:animated]; 

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

        viewController.navigationItem.leftBarButtonItem =[self createBackButton];

    } 

} 

@end

 

使用MyNavigationController替换UINavigationController。或者直接创建一个UINavigationController的新类别