注意:::導(dǎo)航欄的背景圖片 必須符合 width = 44/64乎澄，如果不讓背景圖片充滿上面的狀態(tài)欄突硝，就必須是44的。
如果導(dǎo)航條加了背景圖三圆，那坐標(biāo)原點(diǎn)在導(dǎo)航條下方狞换。如果不加避咆，坐標(biāo)原點(diǎn)不變舟肉。

/// 導(dǎo)航欄的封裝

- (void)setItemWithController:(UIViewController *)viewController title:(NSString *)title image:(NSString *)image selectImage:(NSString *)selectImage
{
    viewController.tabBarItem.title = title;
    viewController.tabBarItem.image = [[UIImage imageNamed:image] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
    viewController.tabBarItem.selectedImage = [[UIImage imageNamed:selectImage] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
    
    viewController.tabBarItem.imageInsets = UIEdgeInsetsMake(5, 0, -5, 0);
    
    NSDictionary *attributes = @{NSForegroundColorAttributeName:[UIColor orangeColor]};
    [viewController.tabBarItem setTitleTextAttributes:attributes forState:UIControlStateSelected];
    
    GJFNavigatuonController *nvc = [[GJFNavigatuonController alloc]initWithRootViewController:viewController];
    nvc.navigationBar.barTintColor = [UIColor orangeColor];
    [self addChildViewController:nvc];
}






    //注意: 界面原點(diǎn)在哪兒
    //  導(dǎo)航中加了背景圖, 原點(diǎn)導(dǎo)航下方
    //  沒有加背景圖, 導(dǎo)航條半透明, 原點(diǎn)屏幕左上角
    UILabel *testLabel = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 320, 30)];
    testLabel.text = @"test";
    testLabel.backgroundColor = [UIColor lightGrayColor];
    [self.view addSubview:testLabel];
    
    self.view.backgroundColor = [UIColor redColor];
    
    
    //設(shè)置導(dǎo)航條
    //  self表示當(dāng)前界面
    //  self.navigationController 當(dāng)前界面所在導(dǎo)航控制器
    //參數(shù)2: 表示導(dǎo)航條狀態(tài)(橫屏, 豎屏)
    //注意: 圖片兩種大小
    //  如果高度44, 只顯示在導(dǎo)航欄區(qū)域
    //  如果高度64, 擴(kuò)展到狀態(tài)欄
    [self.navigationController.navigationBar setBackgroundImage:[UIImage imageNamed:@"header_bg.png"] forBarMetrics:UIBarMetricsDefault];
    
    //設(shè)置導(dǎo)航條上的控件
    //注意: 每個(gè)視圖控制器有屬性  self.navigationItem
    //  每個(gè)界面self.navigationItem, 導(dǎo)航條顯示item中數(shù)據(jù)
    //設(shè)置標(biāo)題
    self.title = @"Main界面";
    self.navigationItem.title = @"主界面";
    
    //注意: 添加不同顏色, 不同字體的title
    //  創(chuàng)建Label設(shè)置為self.navigationItem.titleView
    
    //設(shè)置標(biāo)題為為圖片
    //  類型: UIView *
    UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 60, 35)];
    imageView.image = [UIImage imageNamed:@"logo_title.png"];
    self.navigationItem.titleView = imageView;
    
    //導(dǎo)航條左側(cè)添加按鈕
    //UIBarButtonItem常見3種(系統(tǒng)樣式,自定義,文本)
    //UIBarButtonItem *textItem = [[UIBarButtonItem alloc] initWithTitle:@"分類" style:UIBarButtonItemStylePlain target:self action:@selector(dealConfig:)];
    //UIBarButtonItem *systemItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:@selector(dealConfig:)];
    //自定義按鈕
    UIButton *configButton = [UIButton buttonWithType:UIButtonTypeCustom];
    configButton.frame = CGRectMake(0, 0, 45, 30);
    [configButton setBackgroundImage:[UIImage imageNamed:@"main_left_nav.png"] forState:UIControlStateNormal];
    [configButton addTarget:self action:@selector(btnClick:) forControlEvents:UIControlEventTouchUpInside];
    UIBarButtonItem *custumItem = [[UIBarButtonItem alloc] initWithCustomView:configButton];
    self.navigationItem.leftBarButtonItem = custumItem;
    
    UIButton *photoButton = [UIButton buttonWithType:UIButtonTypeCustom];
    photoButton.frame = CGRectMake(0, 0, 45, 30);
    [photoButton setBackgroundImage:[UIImage imageNamed:@"main_right_nav.png"] forState:UIControlStateNormal];
    [photoButton addTarget:self action:@selector(btnClick:) forControlEvents:UIControlEventTouchUpInside];
    UIBarButtonItem *rightItem = [[UIBarButtonItem alloc] initWithCustomView:photoButton];
    self.navigationItem.rightBarButtonItem = rightItem;
    
    
    //添加一個(gè)按鈕, 打開新的界面
    __weak typeof (self) ws = self;
    //__weak MainViewController* ws = self;
    [self.view addSystemButtonWithFrame:CGRectMake(100, 100, 100, 30) title:@"新界面" action:^(ZTButton *button) {
        
        CategoryViewController *cvc = [[CategoryViewController alloc] init];
        //打開新界面
        [ws.navigationController pushViewController:cvc animated:YES];
        
    }];
    
    
    //顯示工具欄
    //導(dǎo)航控制器默認(rèn)有一個(gè)工具欄, 默認(rèn)隱藏
    self.navigationController.toolbarHidden = YES;
    
    //添加按鈕
    //
    UIBarButtonItem *item1 = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemCamera target:nil action:nil];
    UIBarButtonItem *item2 = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemBookmarks target:nil action:nil];
    UIBarButtonItem *item3 = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAction target:nil action:nil];
    //創(chuàng)建空白item
    //UIBarButtonItem *spaceItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];
    UIBarButtonItem *spaceCustumItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace target:nil action:nil];
    spaceCustumItem.width = 100;
    

    self.toolbarItems = @[item1,spaceCustumItem,item2,spaceCustumItem,item3]