定制navgation上的按钮，设置自己的风格的UIBarButtonItem

定制navgation上的按钮，设置自己的风格的UIBarButtonItem

        UIImage* image= [UIImage imageNamed:@"绑定弹出－返回.png"]; 
        CGRect frame_1= CGRectMake(0, 0, image.size.width, image.size.height-4); 
        UIButton* backButton= [[UIButton alloc] initWithFrame:frame_1]; 
        [backButton setBackgroundImage:image forState:UIControlStateNormal]; 
        [backButton setTitle:@"返回" forState:UIControlStateNormal]; 
        [backButton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal]; 
        backButton.titleLabel.font=[UIFont systemFontOfSize:16]; 
        [backButton addTarget:self action:@selector(doBack:) forControlEvents:UIControlEventTouchUpInside]; 
         
//定制自己的风格的  UIBarButtonItem
         UIBarButtonItem* someBarButtonItem= [[UIBarButtonItem alloc] initWithCustomView:backButton]; 
        [self.navigationItem setLeftBarButtonItem:someBarButtonItem]; 
        [someBarButtonItem release]; 
        [backButton release];