技术干货｜Native页面下如何实现导航栏的定制化开发？

Answer 1

很多mPaaSCoder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。

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=[UIButtonbuttonWithType:UIButtonTypeCustom];button.frame=CGRectMake(0,0,44,44);button.backgroundColor=[UIColorwhiteColor];[buttonsetTitle:@"取消"forState:UIControlStateNormal];button.titleLabel.font=[UIFontsystemFontOfSize:14.0];[buttonsetTitleColor:[UIColorblueColor]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([leftBarButtonItemscount]==1){if(leftBarButtonItems[0]&&[leftBarButtonItems[0]isKindOfClass:[AUBarButtonItemclass]]){//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=[UIColorgreenColor];backItem.titleColor=[UIColororangeColor];//[UIColorcolorFromHexString:@"#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=[UIColorclearColor];}}

（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{[superviewWillAppear: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([backButtonColorStringisKindOfClass:[NSStringclass]]&&[backButtonColorStringlength]>0){UIColor*backButtonColor=[UIColorcolorFromHexString:backButtonColorString];NSArray*leftBarButtonItems=self.navigationItem.leftBarButtonItems;if([leftBarButtonItemscount]==1){if(leftBarButtonItems[0]&&[leftBarButtonItems[0]isKindOfClass:[AUBarButtonItemclass]]){backItem.backButtonTitle=@"测试";//返回按钮titlebackItem.titleColor=backButtonColor;//返回按钮文本颜色backItem.backButtonColor=[UIColorblueColor];//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=[AUBarButtonItembarButtonItemWithIconFontName:kICONFONT_BACKiconColor:[UIColorlightGrayColor]target:selfaction:@selector(custBack:)];AUBarButtonItem*backItem=[AUBarButtonItembackBarButtonItemWithTitle:@"测试"backArrowColor:[UIColorredColor]target:selfaction:@selector(custBack:)];backItem.customView.frame=CGRectMake(0,0,44,44);AUBarButtonItem*closeItem=[AUBarButtonItembarButtonItemWithIconFontName:kICONFONT_SYSTEM_CANCEL_BOLDiconColor:[UIColorlightGrayColor]target:selfaction:@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=[UIButtonbuttonWithType:UIButtonTypeCustom];button.frame=CGRectMake(0,0,40,40);[buttonsetTitle:@"我的"forState:UIControlStateNormal];[buttonsetTitleColor:[UIColorblackColor]forState:UIControlStateNormal];[buttonsetBackgroundColor:[UIColorwhiteColor]];button.titleLabel.font=[UIFontsystemFontOfSize:14.0f];AUBarButtonItem*backItem=[[AUBarButtonItemalloc]initWithCustomView:button];

//返回按钮事件-(void)custBack:(id)sender{NSLog(@"back-----");[selfback];}//关闭所有session-(void)custClose:(id)sender{NSLog(@"close------");NSArray<NBSession*>*sessions=[[NBContextsharedContext]sessions];for(NBSession*sessioninsessions){[[NBContextsharedContext]exitSession:sessionanimated: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[eventpreventDefault];NBNavigationItemLeftCloseEvent*itemEvent=(NBNavigationItemLeftCloseEvent*)event;UIButton*button=[UIButtonbuttonWithType:UIButtonTypeCustom];button.frame=CGRectMake(0,0,44,44);button.backgroundColor=[UIColorwhiteColor];[buttonsetTitle:@"关闭"forState:UIControlStateNormal];[buttonsetTitleColor:[UIColorblackColor]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[eventpreventDefault];NBNavigationItemLeftCloseEvent*itemEvent=(NBNavigationItemLeftCloseEvent*)event;UIButton*closeButton=(UIButton*)itemEvent.customView;[closeButtonsetTitle:@"关闭"forState:UIControlStateNormal];[closeButtonsetTitleColor:[UIColorgreenColor]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";[[MPNebulaAdapterInterfaceshareInstance]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。

//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([leftBarButtonItemscount]==1){if(leftBarButtonItems[0]&&[leftBarButtonItems[0]isKindOfClass:[AUBarButtonItemclass]]){//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=[UIColorgreenColor];backItem.titleColor=[UIColororangeColor];//[UIColorcolorFromHexString:@"#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=[UIColorclearColor];}}0

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_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([leftBarButtonItemscount]==1){if(leftBarButtonItems[0]&&[leftBarButtonItems[0]isKindOfClass:[AUBarButtonItemclass]]){//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=[UIColorgreenColor];backItem.titleColor=[UIColororangeColor];//[UIColorcolorFromHexString:@"#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=[UIColorclearColor];}}1

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_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([leftBarButtonItemscount]==1){if(leftBarButtonItems[0]&&[leftBarButtonItems[0]isKindOfClass:[AUBarButtonItemclass]]){//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=[UIColorgreenColor];backItem.titleColor=[UIColororangeColor];//[UIColorcolorFromHexString:@"#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=[UIColorclearColor];}}2

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[eventstopPropagation];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：

//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([leftBarButtonItemscount]==1){if(leftBarButtonItems[0]&&[leftBarButtonItems[0]isKindOfClass:[AUBarButtonItemclass]]){//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=[UIColorgreenColor];backItem.titleColor=[UIColororangeColor];//[UIColorcolorFromHexString:@"#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=[UIColorclearColor];}}3

（2）文字样式：

//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([leftBarButtonItemscount]==1){if(leftBarButtonItems[0]&&[leftBarButtonItems[0]isKindOfClass:[AUBarButtonItemclass]]){//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=[UIColorgreenColor];backItem.titleColor=[UIColororangeColor];//[UIColorcolorFromHexString:@"#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=[UIColorclearColor];}}4

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：//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([leftBarButtonItemscount]==1){if(leftBarButtonItems[0]&&[leftBarButtonItems[0]isKindOfClass:[AUBarButtonItemclass]]){//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=[UIColorgreenColor];backItem.titleColor=[UIColororangeColor];//[UIColorcolorFromHexString:@"#00ff00"];//