全局定义UINavigationContoller--By秀清

//
//  NavController.m
//
//  Created by Joe Zhang on 15/5/23.
//  Copyright (c) 2015年 张秀清. All rights reserved.
//

#import "NavController.h"
#import "UIBarButtonItem+Joe.h"
#import "Prefix.h"

@interface NavController ()

@end

@implementation NavController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    [self setUINavigationBar];
    
    [self setUIBarBuutonItem];
}

-(void)setUINavigationBar{
    
    if (!iOS7) {
        //Appearance  全局设置UINavigationBar
        UINavigationBar *bar = [UINavigationBar appearance];
        [bar setBackgroundImage:[UIImage imageNamed:@"navigationbar_background"] forBarMetrics:UIBarMetricsDefault];
    }
}

-(void)setUIBarBuutonItem{
    //全局设置UIBarButtonItem
    UIBarButtonItem *item = [UIBarButtonItem appearance];
    
    NSShadow *shadow = [[NSShadow alloc]init];
    shadow.shadowOffset = CGSizeMake(0, 0);
    [item setTitleTextAttributes:@{
                                   NSFontAttributeName : [UIFont systemFontOfSize:15],
                                   NSForegroundColorAttributeName : [UIColor orangeColor],
                                   NSShadowAttributeName : shadow
                                   
                                   } forState:UIControlStateNormal];
}
//重写Push方法
-(void)pushViewController:(UIViewController *)viewController animated:(BOOL)animated{
    
    
    if (self.viewControllers.count>0) {//如果栈底的控制器个数大于0(tabbar4个nav之后的控制器)
        
        viewController.hidesBottomBarWhenPushed = YES;//隐藏底部tabbar
       
        viewController.navigationItem.leftBarButtonItem = [UIBarButtonItem itemWithImageName:@"navigationbar_back" highLightImageName:@"navigationbar_back_highlighted" target:self action:@selector(back)];
        
        viewController.navigationItem.rightBarButtonItem = [UIBarButtonItem itemWithImageName:@"navigationbar_more" highLightImageName:@"navigationbar_more_highlighted" target:self action:@selector(pop)];
        
    }
    [super pushViewController:viewController animated:YES];
}

-(void)back{
    
    [self popViewControllerAnimated:YES];
}

-(void)pop{
    
    [self popToRootViewControllerAnimated:YES];
}

@end