技术干货|技术干货｜ Native 页面下如何实现导航栏的定制化开发（）技术干货｜Native页面下如何实

很多 mPaaS Coder 在接入 H5 容器后都会对容器的导航栏进行深度定制，本文旨在通过不同实际场景的描述，供大家参考完成 Native 页面的定制化开发。
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Native 修改导航栏左侧返回按钮（一）自定义 NBPluginBase 插件中修改 1.自定义原生 BarButtonItem
监听 kNBEvent_Scene_NavigationItem_Left_Back_Create_Before，在此监听事件中设置自定义 BarButtonItem

//监听kNBEvent_Scene_NavigationItem_Left_Back_Create_Before，在此监听事件中：UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom]; button.frame = CGRectMake(0, 0, 44, 44); button.backgroundColor = [UIColor whiteColor]; [button setTitle:@"取消" forState:UIControlStateNormal]; button.titleLabel.font = [UIFont systemFontOfSize:14.0]; [button setTitleColor:[UIColor blueColor] forState:UIControlStateNormal]; event.context.currentViewController.navigationItem.leftBarButtonItem.customView = button;

注：此方案自定义button，需要自行实现关闭页面逻辑。
2.修改返回按钮
监听 kNBEvent_Scene_NavigationItem_Left_Back_Create_After，在此监听事件中修改默认返回按钮样式，包括文案颜色、返回箭头等，文案内容默认不可修改。

//监听kNBEvent_Scene_NavigationItem_Left_Back_Create_After，在此监听事件中： // 修改返回按钮样式 NSArray *leftBarButtonItems = event.context.currentViewController.navigationItem.leftBarButtonItems; if ([leftBarButtonItems count] == 1) { if (leftBarButtonItems[0] && [leftBarButtonItems[0] isKindOfClass:[AUBarButtonItem class]]) { //在默认返回按钮基础上，修改返回箭头和文案颜色 AUBarButtonItem *backItem = leftBarButtonItems[0]; backItem.backButtonColor = [UIColor greenColor]; backItem.titleColor = [UIColor orangeColor]; // [UIColor colorFromHexString:@"#00ff00"]; //隐藏、显示返回箭头 backItem.hideBackButtonImage = NO; //backItem.backButtonTitle; 标题内容更改无效。// 隐藏返回文案：文案设置为透明，保留返回按钮 s 点击区域 //backItem.titleColor = [UIColor clearColor]; } }

（二）H5容器中自定义修改 1.方式一，在 viewWillAppear 获取自定义启动参数，根据参数自定义返回按钮。

- (void)viewWillAppear:(BOOL)animated { [super viewWillAppear:animated]; // 当前页面的启动参数 NSDictionary *expandParams = self.psdScene.createParam.expandParams; NSLog(@"[mpaas] expandParams: %@", expandParams); }

获取启动参数后，依据自定义参数实现自定义按钮。

// 修改默认返回按钮文案颜色 NSString *backButtonColorString = expandParams[@"backButtonColor"]; if ([backButtonColorString isKindOfClass:[NSString class]] && [backButtonColorString length] > 0) { UIColor *backButtonColor = [UIColor colorFromHexString:backButtonColorString]; NSArray *leftBarButtonItems = self.navigationItem.leftBarButtonItems; if ([leftBarButtonItems count] == 1) { if (leftBarButtonItems[0] && [leftBarButtonItems[0] isKindOfClass:[AUBarButtonItem class]]) { backItem.backButtonTitle = @"测试"; // 返回按钮title backItem.titleColor = backButtonColor; // 返回按钮文本颜色 backItem.backButtonColor = [UIColor blueColor]; // 设置箭头颜色 backItem.hideBackButtonImage = NO; //隐藏返回按钮图片，提供给框架使用 // 返回按钮图片 backItem.backButtonImage; 设置无效，只可隐藏or显示 } } }

2.方式二，可以在 viewWillAppear 自定义整个返回区域 AUBarButtonItem 按钮、个数：

AUBarButtonItem *backItem = [AUBarButtonItem barButtonItemWithIconFontName:kICONFONT_BACK iconColor:[UIColor lightGrayColor] target:self action:@selector(custBack:)]; AUBarButtonItem *backItem = [AUBarButtonItem backBarButtonItemWithTitle:@"测试" backArrowColor:[UIColor redColor] target:self action:@selector(custBack:)]; backItem.customView.frame = CGRectMake(0, 0, 44, 44); AUBarButtonItem *closeItem = [AUBarButtonItem barButtonItemWithIconFontName:kICONFONT_SYSTEM_CANCEL_BOLD iconColor:[UIColor lightGrayColor] target:self action:@selector(custClose:)]; closeItem.customView.frame = CGRectMake(0, 0, 30, 44); self.navigationItem.leftBarButtonItems = @[backItem,closeItem];

如果要修改 BarButtonItem 的文字大小、颜色等深度定制可以参考以下代码：

UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom]; button.frame = CGRectMake(0, 0, 40, 40); [button setTitle:@"我的" forState:UIControlStateNormal]; [button setTitleColor:[UIColor blackColor] forState:UIControlStateNormal]; [button setBackgroundColor: [UIColor whiteColor]]; button.titleLabel.font = [UIFont systemFontOfSize:14.0f]; AUBarButtonItem *backItem = [[AUBarButtonItem alloc] initWithCustomView:button];

//返回按钮事件 - (void)custBack:(id)sender{ NSLog(@"back -----"); [self back]; } //关闭所有session - (void)custClose:(id)sender{ NSLog(@"close------"); NSArray *sessions = [[NBContext sharedContext] sessions]; for (NBSession* session in sessions) { [[NBContext sharedContext] exitSession:session animated:YES]; } }

Native 修改导航栏左侧关闭按钮（一）在自定义 NBPluginBase 插件中关闭按钮需自行创建监听 kNBEvent_Scene_NavigationItem_Left_Close_Create_Before，在此监听事件中创建关闭按钮。

//监听kNBEvent_Scene_NavigationItem_Left_Close_Create_Before，在此监听事件中： // 创建关闭按钮 [event preventDefault]; NBNavigationItemLeftCloseEvent *itemEvent = (NBNavigationItemLeftCloseEvent *)event; UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom]; button.frame = CGRectMake(0, 0, 44, 44); button.backgroundColor = [UIColor whiteColor]; [button setTitle:@"关闭" forState:UIControlStateNormal]; [button setTitleColor:[UIColor blackColor] forState:UIControlStateNormal]; itemEvent.customView = button;

监听kNBEvent_Scene_NavigationItem_Left_Close_Create_After，在此监听事件中修改关闭按钮样式。

//监听kNBEvent_Scene_NavigationItem_Left_Close_Create_After，在此监听事件中： // 修改关闭按钮样式 [event preventDefault]; NBNavigationItemLeftCloseEvent *itemEvent = (NBNavigationItemLeftCloseEvent *)event; UIButton *closeButton = (UIButton *)itemEvent.customView; [closeButton setTitle:@"关闭" forState:UIControlStateNormal]; [closeButton setTitleColor:[UIColor greenColor] forState:UIControlStateNormal];

Native 修改导航栏标题（一）在viewWillAppear 获取自定义启动参数，根据参数自定义标题

//打开H5离线包 NSString *appId = @"20190927"; [[MPNebulaAdapterInterface shareInstance]startH5ViewControllerWithNebulaApp:@{@"appId":appId,@"defaultTitle":@"测试",@"readTitle":@"NO",@"titleColor":@"ff0000",@"titleFont":@"18.0"}]; //启动参数设置标题文案、颜色、大小;

这里的参数key值appId、defaultTitle、readTitle为框架默认不可修改，其余参数 key 值自定义。

- (void)viewWillAppear:(BOOL)animated { [super viewWillAppear:animated]; // 当前页面的启动参数 NSDictionary *expandParams = self.psdScene.createParam.expandParams; NSLog(@"[mpaas] expandParams: %@", expandParams); // 设置导航栏标题 NSString *titleColorString = expandParams[@"titleColor"]; NSString *titleFont = expandParams[@"titleFont"]; if ([titleColorString isKindOfClass:[NSString class]] && [titleColorString length] > 0 && [titleFont length] > 0) { UIColor *titleColor = [UIColor colorFromHexString:titleColorString]; id titleView =self.navigationItem.titleView; [[titleView mainTitleLabel] setTextColor:titleColor]; float font = [titleFont floatValue]; [[titleView mainTitleLabel] setFont:[UIFont systemFontOfSize:font]]; } }

Native 修改导航栏右侧按钮（一）NBPluginBase 插件中自定义修改 1.在 NBPluginBase 中，
监听 kNBEvent_Scene_NavigationItem_Right_Setting_Create_Before，在此监听事件中创建导航栏右侧按钮。

//监听kNBEvent_Scene_NavigationItem_Right_Setting_Create_Before，在此监听事件中： NBNavigationItemRightSettingEvent *settingEvent = (id)event; settingEvent.adjustsWidthToFitText = YES; settingEvent.maxWidth = [UIScreen mainScreen].bounds.size.width / 4.0f; UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom]; button.frame = CGRectMake(0, 0, 33, 40); [button setTitle:@"设置" forState:UIControlStateNormal]; [button setTitleColor:[UIColor blackColor] forState:UIControlStateNormal]; [button setBackgroundColor: [UIColor whiteColor]]; settingEvent.customView = button; [event preventDefault];

2.在 NBPluginBase 中
监听kNBEvent_Scene_NavigationItem_Right_Setting_Create_After，在此监听事件中修改导航栏右侧按钮。

//监听kNBEvent_Scene_NavigationItem_Right_Setting_Create_After，在此监听事件中： NBNavigationItemRightSettingEvent *settingEvent = (id)event; settingEvent.adjustsWidthToFitText = YES; settingEvent.maxWidth = [UIScreen mainScreen].bounds.size.width / 4.0f; UIButton *button = settingEvent.customView; button.titleLabel.font = [UIFont systemFontOfSize:14.0f]; button.frame = CGRectMake(0, 0, 40, 40); [button setTitleColor:[UIColor redColor] forState:UIControlStateNormal]; [button setTitleColor:[UIColor blackColor] forState:UIControlStateHighlighted]; [button setBackgroundColor: [UIColor whiteColor]]; [event stopPropagation]; //去掉默认按钮图片

注：
1. 在插件中自定义导航栏右侧按钮，必须要在打开H5容器的启动参数中设置@{@"showOptionMenu": @"YES"} 否则设置右侧按钮无效。
2. 必须要在kNBEvent_Scene_NavigationItem_Right_Setting_Create_After监听事件中实现[event stopPropagation]; 否则showOptionMenu按钮的默认图片没有办法去掉。
（二）H5 容器中自定义修改 1.在 viewWillAppear 获取自定义启动参数，根据参数自定义设置 AUBarButtonItem按钮。
（1）图片样式：

AUBarButtonItem *rightItem1 = [[AUBarButtonItem alloc] initWithImage:image1 style:UIBarButtonItemStylePlain target:self action:@selector(rightBarItemPressed1)]; AUBarButtonItem *rightItem2 = [[AUBarButtonItem alloc] initWithImage:image2 style:UIBarButtonItemStylePlain target:self action:@selector(rightBarItemPressed2)]; //单个按钮 self.navigationItem.rightBarButtonItem = rightItem1; //多个按钮 self.navigationItem.rightBarButtonItems = @[rightItem1, rightItem2];

（2）文字样式：

AUBarButtonItem *titleItem1 = [[AUBarButtonItem alloc]initWithTitle:@"按钮" style:UIBarButtonItemStylePlain target:self action:@selector(rightBarItemPressed1)]; AUBarButtonItem *titleItem2 = [[AUBarButtonItem alloc]initWithTitle:@"右侧" style:UIBarButtonItemStylePlain target:self action:@selector(rightBarItemPressed2)]; //单个按钮 self.navigationItem.rightBarButtonItem = rightItem1; //多个按钮 self.navigationItem.rightBarButtonItems = @[titleItem1, titleItem2];

2.如果要修改 BarButtonItem 的文字大小、颜色等深度定制参考以下代码：

UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom]; button.frame = CGRectMake(0, 0, 40, 40); [button setTitle:@"我的" forState:UIControlStateNormal]; [button setTitleColor:[UIColor blackColor] forState:UIControlStateNormal]; [button setBackgroundColor: [UIColor whiteColor]]; button.titleLabel.font = [UIFont systemFontOfSize:14.0f]; AUBarButtonItem *rightItem = [[AUBarButtonItem alloc] initWithCustomView:button];

Native 自定义导航栏（一）隐藏原生导航栏自定义导航栏，要先隐藏原生导航栏。

//隐藏容器类navBar self.options.showTitleBar = NO; //隐藏系统层navBar [self.navigationController setNavigationBarHidden:YES];

（二）创建 navBarView

创建 AUCustomNavigationBar 初始化方法必须要 navigationBarForCurrentVC: 否则按钮设置无效。
赋值给 self.customNavigationBar 容器会自动适配H5页面高度，否则需自行适配页面。

//创建navBarView，必须要用此方法 AUCustomNavigationBar *navBar = [AUCustomNavigationBar navigationBarForCurrentVC:self]; [self.view addSubview:navBar]; //设置给容器VC self.customNavigationBar = navBar;

（三）自定义背景样式设置背景色、渐变色等，setNavigationBarBlurEffective 设置毛玻璃效果，支持更多样式自选。

//设置背景颜色，渐变色可自行设置 navBar.backgroundColor = [UIColor lightGrayColor]; [navBar setNavigationBarBlurEffectiveWithStyle:UIBlurEffectStyleDark]; // 毛玻璃效果，更多样式自选

（四）设置左侧导航按钮 1.设置左侧导航按钮方式一：

//导航左侧按钮 navBar.backButtonTitle = @"取消"; navBar.backTitleLabel.font = [UIFont systemFontOfSize:16.0]; navBar.backButtonTitleColor = [UIColor orangeColor]; navBar.backButtonImage = [UIImage imageNamed:@"back_button@2x"]; [navBar addSubview:navBar.leftItem];

2.设置左侧导航按钮，自行关联事件方式二，与方式一冲突，两者选其一。

//自行关联事件方式，与上述属性设置冲突。 //image和title两者选其一 [navBar setNavigationBarLeftItemWithImage:[UIImage imageNamed:@"back_button@2x"]target:self action:@selector(leftItemImageClick)]; [navBar setNavigationBarLeftItemWithTitle:@"取消" target:self action:@selector(leftItemTitleClick)];

（五）设置导航栏标题 1.设置导航栏标题方式一:

//设置导航栏标题 navBar.title = @"标题"; navBar.titleColor = [UIColor redColor]; navBar.titleLabel.font = [UIFont systemFontOfSize:14.0];

2.设置导航栏标题，AUDoubleTitleView双标题titleView方式二：

//设置双标题titleView AUDoubleTitleView *titleView = [[AUDoubleTitleView alloc]initWithTitle:@"主标题" detailTitle:@"副标题"]; navBar.titleView = titleView; //这里使用了mPaaS下双标题UI，也可自行实现titleView

（六）设置导航栏右侧按钮 1.单个右侧按钮
（1）设置单个按钮方式一：

//设置导航右侧按钮 navBar.rightItemTitle = @"菜单"; navBar.rightItemTitleColor = [UIColor blackColor]; //image和title两者选其一 navBar.rightItemImage = [UIImage imageNamed:@"rightTT@2x"];

（2）设置单个按钮方式二：

//自行关联事件方式 //image和title两者选其一 [navBar setNavigationBarRightItemWithTitle:@"菜单" target:self action:@selector(rightItemTitleClick)]; [navBar setNavigationBarRightItemWithImage:[UIImage imageNamed:@"rightTT@2x"] target:self action:@selector(rightItemImageClick)];

2.深度自定义单、多个右侧按钮
深度自定义右侧按钮、文字、大小、图片，自行关联事件。

//深度自定义右侧按钮、文字、大小、图片、关联事件 AUButton *button = [AUButton buttonWithStyle:AUButtonStyleNone title:@"右一" target:self action:@selector(rightItemTitleClick)]; button.titleLabel.font = [UIFont systemFontOfSize:16.0]; [button setTitleColor:[UIColor redColor] forState:UIControlStateNormal]; AUButton *button1 = [AUButton buttonWithStyle:AUButtonStyleNone]; [button1 setImage:[UIImage imageNamed:@"rightTT@2x"] forState:UIControlStateNormal]; navBar.rightItemList = @[button,button1];

本文作者：阿里云 mPaaS TAM 团队（石鹏飞荣阳）
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