给导航控制器添加按钮 和 标题

1. 添加标题（以图片的形式添加标题）

self.navigationItem.titleView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"MainTitle"]];

2. 添加导航栏左侧的按钮

因为有 高亮图片所以要自定义一个UIButton,在把这个按钮赋值给 leftBarButtonItem

// 设置导航栏左边的按钮
    UIButton *tagButton = [UIButton buttonWithType:UIButtonTypeCustom];
    
    [tagButton setBackgroundImage:[UIImage imageNamed:@"MainTagSubIcon"] forState:UIControlStateNormal];
    
    [tagButton setBackgroundImage:[UIImage imageNamed:@"MainTagSubIconClick"] forState:UIControlStateHighlighted];
    
    tagButton.size = tagButton.currentBackgroundImage.size;
    
    [tagButton addTarget:self action:@selector(tagClick) forControlEvents:UIControlEventTouchUpInside];
    
    self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:tagButton];

3. 打印类名 和 方法名

NSLog(@"%s", __func__)

可以写成

#define OSLogFunc NSLog(@"%s", __func__)

4. self.title  等于 “self.navigationItem.title + self.tabBarItem.title”

    self.title = @"我的关注"; // 这一句话就相当于修改了两个地方的title.一个是导航栏的一个是tabBar的


    self.navigationItem.title = @"我的关注";
    self.tabBarItem.title = @"我的关注";

5. 设置导航栏右边的按钮

如果要是右边只有一个按钮，使用“rightBarButtonItem” 如果右侧有两个或者更多。使用 “rightBarButtonItems”

// 设置导航栏右边的按钮
    UIButton *settingButton = [UIButton buttonWithType:UIButtonTypeCustom];
    [settingButton setBackgroundImage:[UIImage imageNamed:@"mine-setting-icon"] forState:UIControlStateNormal];
    [settingButton setBackgroundImage:[UIImage imageNamed:@"mine-setting-icon-click"] forState:UIControlStateHighlighted];
    settingButton.size = settingButton.currentBackgroundImage.size;
    [settingButton addTarget:self action:@selector(settingClick) forControlEvents:UIControlEventTouchUpInside];
    
    UIButton *nightModeButton = [UIButton buttonWithType:UIButtonTypeCustom];
    [nightModeButton setBackgroundImage:[UIImage imageNamed:@"mine-moon-icon"] forState:UIControlStateNormal];
    [nightModeButton setBackgroundImage:[UIImage imageNamed:@"mine-moon-icon-click"] forState:UIControlStateHighlighted];
    nightModeButton.size = nightModeButton.currentBackgroundImage.size;
    [nightModeButton addTarget:self action:@selector(nightModeClick) forControlEvents:UIControlEventTouchUpInside];
    
    self.navigationItem.rightBarButtonItems =
 　　　　　　　　　　　　　　　　　　　　@[
                                    [[UIBarButtonItem alloc] initWithCustomView:settingButton],
                                    [[UIBarButtonItem alloc] initWithCustomView:nightModeButton]
                                    ];