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在定制 H5 頁面的導航欄樣式前，您需要確保已經了解以下框架導航欄和 H5 容器相關知識。

前置條件

設置所有 H5 頁面導航欄默認樣式

在應用主題的基礎上，若您需要指定所有 H5 頁面統一的樣式，可以通過監聽 Nebula 容器提供的事件機制進行定制。

容器支持的事件，參見頭文件 NebulaSDK/NBDefine.h：

自定義插件監聽事件需要進行定制：

@implementation MPPlugin4TitleView

- (void)pluginDidLoad
{
     self.scope = kPSDScope_Scene;
     // -- 返回區域
     [self.target addEventListener:kNBEvent_Scene_NavigationItem_Left_Back_Create_Before withListener:self useCapture:NO];
     [self.target addEventListener:kNBEvent_Scene_NavigationItem_Left_Back_Create_After withListener:self useCapture:NO];
     [self.target addEventListener:kNBEvent_Scene_NavigationItem_Left_Close_Create_Before withListener:self useCapture:NO];
     [self.target addEventListener:kNBEvent_Scene_NavigationItem_Left_Close_Create_After withListener:self useCapture:NO];

     // -- 標題區域
     [self.target addEventListener:kNBEvent_Scene_TitleView_Create_Before withListener:self useCapture:NO];
     [self.target addEventListener:kNBEvent_Scene_TitleView_Create_After withListener:self useCapture:NO];

     // -- 控制按鈕區域
     [self.target addEventListener:kNBEvent_Scene_NavigationItem_Right_Setting_Create_Before withListener:self useCapture:NO];
     [self.target addEventListener:kNBEvent_Scene_NavigationItem_Right_Setting_Create_After withListener:self useCapture:NO];
     [self.target addEventListener:kNBEvent_Scene_NavigationItem_Right_SubSetting_Create_After withListener:self useCapture:NO];
     [self.target addEventListener:kNBEvent_Scene_NavigationItem_Right_Setting_Change withListener:self useCapture:NO];

     // -- 進度條
     [self.target addEventListener:kNBEvent_Scene_ProgressView_Create_Before withListener:self useCapture:NO];
     [self.target addEventListener:kNBEvent_Scene_ProgressView_Create_After withListener:self useCapture:NO];

     [super pluginDidLoad];
}

設置返回區域中返回按鈕和關閉按鈕的樣式：

  - (void)handleEvent:(PSDEvent *)event
  {
      [super handleEvent:event];

      if ([kNBEvent_Scene_NavigationItem_Left_Back_Create_Before isEqualToString:event.eventType]) {
          [event preventDefault];

          event.context.currentViewController.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"取消" style:UIBarButtonItemStylePlain target:self action:@selector(onClickBack)];
      }else if ([kNBEvent_Scene_NavigationItem_Left_Back_Create_After isEqualToString:event.eventType]){
          // 修改返回按鈕樣式
          NSArray *leftBarButtonItems = event.context.currentViewController.navigationItem.leftBarButtonItems;
          if ([leftBarButtonItems count] == 1) {
              if (leftBarButtonItems[0] && [leftBarButtonItems[0] isKindOfClass:[AUBarButtonItem class]]) {
                  // 在默認返回按鈕基礎上，修改返回箭頭和文案顏色
                  AUBarButtonItem *backItem = leftBarButtonItems[0];
                  backItem.backButtonColor = [UIColor greenColor];
                  backItem.titleColor = [UIColor colorFromHexString:@"#00ff00"];

                  // 隱藏返回箭頭
  //                backItem.hideBackButtonImage = YES;

                  // 隱藏返回文案：文案設置為透明，保留返回按鈕 s 點擊區域
  //                backItem.titleColor = [UIColor clearColor];
              }
          }
      }else if ([kNBEvent_Scene_NavigationItem_Left_Close_Create_Before isEqualToString:event.eventType]){
  //        // 隱藏關閉按鈕
  //        [event preventDefault];
  //        NBNavigationItemLeftCloseEvent *itemEvent = (NBNavigationItemLeftCloseEvent *)event;
  //        UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
  //        button.frame = CGRectMake(0, 0, 44, 44);
  //        button.backgroundColor = [UIColor greenColor];
  //        [button setTitle:@"Close" forState:UIControlStateNormal];
  //        itemEvent.customView = button;
      }else if ([kNBEvent_Scene_NavigationItem_Left_Close_Create_After isEqualToString:event.eventType]){
  //        // 修改關閉按鈕樣式
  //        [event preventDefault];
  //        NBNavigationItemLeftCloseEvent *itemEvent = (NBNavigationItemLeftCloseEvent *)event;
  //        UIButton *closeButton = (UIButton *)itemEvent.customView;
  //        [closeButton setTitle:@"Close" forState:UIControlStateNormal];
  //        [closeButton setTitleColor:[UIColor greenColor] forState:UIControlStateNormal];
      }
  }

設置 H5 頁面標題樣式：

  if ([kNBEvent_Scene_TitleView_Create_Before isEqualToString:event.eventType]) {
          // 重寫 TitleView 的樣式
          NBNavigationTitleViewEvent *e = (id)event;
          [e preventDefault];

      }else if ([kNBEvent_Scene_TitleView_Create_After isEqualToString:event.eventType]) {
          // 更改已創建 TitleView 的樣式
          NBNavigationTitleViewEvent *e = (id)event;
          [[e.titleView mainTitleLabel] setFont:[UIFont systemFontOfSize:16]];
          [[e.titleView mainTitleLabel] setTextColor:[UIColor greenColor]];
          [e.titleView mainTitleLabel].lineBreakMode = NSLineBreakByTruncatingMiddle;
      }

設置 OptionMebu 控制按鈕的樣式：

  if ([kNBEvent_Scene_NavigationItem_Right_Setting_Create_After isEqualToString:event.eventType] || [kNBEvent_Scene_NavigationItem_Right_SubSetting_Create_After isEqualToString:event.eventType]) {
          // 更改已創建 RightBarItem 的樣式
          NBNavigationItemRightSettingEvent *settingEvent = (id)event;
          settingEvent.adjustsWidthToFitText = YES;
          settingEvent.maxWidth = [UIScreen mainScreen].bounds.size.width / 3.0f;
          UIButton *button = settingEvent.customView;
          button.titleLabel.font = [UIFont systemFontOfSize:14.0f];
          CGRect frame = CGRectMake(0, 0, 22, 22);
          button.frame = frame;
          [button setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
          if (!CGSizeEqualToSize(button.bounds.size, frame.size)) {
              button.frame = frame;
          }
      }

設置 H5 頁面加載時進度條的樣式：

if([kNBEvent_Scene_ProgressView_Create_After isEqualToString:event.eventType]){
      NBProgressViewEvent *progressEvent = (NBProgressViewEvent *)event;
      id<NBProgressViewProtocol> progressView = progressEvent.progressView;
      [progressView setProgressTintColor:[UIColor greenColor]];
  }

定制某個 H5 頁面導航欄樣式

若您需要定制某個 H5 頁面導航欄的樣式，根據修改時機不同，提供的方法也分為兩類：頁面加載前 與 頁面打開后。

頁面加載前，在默認導航欄樣式基礎上定制導航欄，主要分為以下兩步：

自定義啟動參數，當前 H5 頁面加載時自定義啟動參數，指定定制方式：

從 H5 頁面進入另一個 H5 頁面，傳遞自定義啟動參數的方法參見 pushWindow 打開新頁面和 startApp 啟動其他應用。

從 Native 頁面進入一個 H5 頁面，傳遞自定義啟動參數的方法參考如下代碼：

   #pragma mark 進入頁面時修改，H5 需通過啟動參數設置
   - (void)gotoHideNavigator
   {
       // 打開 H5 頁面，隱藏導航欄
       [[MPNebulaAdapterInterface shareInstance] startH5ViewControllerWithParams:@{@"url": @"https://tech.antfin.com", @"showTitleBar":@NO,@"transparentTitle":@"auto"}];
   }

   - (void)gotoShowNavigator
   {
       // 打開 H5 頁面，顯示導航欄
       [[MPNebulaAdapterInterface shareInstance] startH5ViewControllerWithParams:@{@"url": @"https://tech.antfin.com", @"showTitleBar":@YES}];
   }

   - (void)gotoTransparency
   {
       // 打開 H5 頁面，設置透明導航欄
       [[MPNebulaAdapterInterface shareInstance] startH5ViewControllerWithParams:@{@"url": @"https://tech.antfin.com", @"transparentTitle":@"auto"}];
   }

   - (void)gotoUpdateBackgroundColor
   {
       // 修改導航欄背景顏色
       [[MPNebulaAdapterInterface shareInstance] startH5ViewControllerWithParams:@{@"url": @"https://tech.antfin.com", @"titleBarColor":@"16775138"}];
   }

   - (void)gotoUpdateStatusBarStyle
   {
       // 修改狀態欄顏色
       [[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleLightContent];
   }

   - (void)gotoUpdateBackTitleColor
   {
       // 修改默認返回按鈕文案顏色
       [[MPNebulaAdapterInterface shareInstance] startH5ViewControllerWithParams:@{@"url": @"https://tech.antfin.com", @"backButtonColor":@"ff0000"}];
   }

   - (void)gotoUpdateTitleColor
   {
       // 修改標題顏色
       [[MPNebulaAdapterInterface shareInstance] startH5ViewControllerWithParams:@{@"url": @"https://tech.antfin.com", @"titleColor":@"ff0000"}];
   }

處理 H5 基類，在基類的 viewWillAppear 方法中，根據傳入的啟動參數調用 native 接口方法對導航欄樣式進行修改如下：

 - (void)viewWillAppear:(BOOL)animated
 {
     [super viewWillAppear:animated];

     // 當前頁面的 WebView
     UIWebView *currentWebView = (UIWebView *)self.psdContentView;
     NSLog(@"[mpaas] webView: %@", currentWebView);

     // 當前頁面的啟動參數
     NSDictionary *expandParams = self.psdScene.createParam.expandParams;
     NSLog(@"[mpaas] expandParams: %@", expandParams);

     if ([expandParams count] > 0) {
         [self customNavigationBarWithParams:expandParams];
     }
     WKWebView *webView = (WKWebView *)[self psdContentView];
     if (@available(iOS 11.0, *)) {
         webView.scrollView.contentInsetAdjustmentBehavior = UIScrollViewContentInsetAdjustmentNever;
     } else {
         self.automaticallyAdjustsScrollViewInsets = NO;
     }
     webView.scrollView.contentInset = UIEdgeInsetsMake(200, 0, 0, 0);
     webView.scrollView.scrollIndicatorInsets = webView.scrollView.contentInset;
 }

 - (void)customNavigationBarWithParams:(NSDictionary *)expandParams
 {
     // 定制導航欄背景
     NSString *titleBarColorString = expandParams[@"titleBarColor"];
     if ([titleBarColorString isKindOfClass:[NSString class]] && [titleBarColorString length] > 0) {
         UIColor *titleBarColor = [UIColor colorFromHexString:titleBarColorString];
         [self.navigationController.navigationBar setNavigationBarStyleWithColor:titleBarColor translucent:NO];
         [self.navigationController.navigationBar setNavigationBarBottomLineColor:titleBarColor];
     }

     //導航欄是否隱藏，默認不隱藏。設置隱藏后，webview 需全屏
     NSString *showTitleBar = expandParams[@"showTitleBar"];
     if (showTitleBar && ![showTitleBar boolValue]) {
         self.options.showTitleBar = NO;
         [self.navigationController setNavigationBarHidden:YES];

         // 調整 webview 的位置
         UIWebView *webView = (UIWebView *)[self psdContentView];
         CGRect frame = webView.frame;
         frame.origin.y = [[UIApplication sharedApplication] statusBarFrame].size.height;
         frame.size.height -= [[UIApplication sharedApplication] statusBarFrame].size.height;
         webView.frame = frame;
         self.automaticallyAdjustsScrollViewInsets = NO;

     }

     //導航欄是否透明，默認不透明。設置透明后，webview 需全屏
     NSString *transparentTitle = expandParams[@"transparentTitle"];
     if ([transparentTitle isEqualToString:@"always"] || [transparentTitle isEqualToString:@"auto"]) {

         // 導航欄和底部橫線變為透明
         UIColor *clearColor = [UIColor clearColor] ;
         [self.navigationController.navigationBar setNavigationBarTranslucentStyle];
         [self.navigationController.navigationBar setNavigationBarStyleWithColor:clearColor translucent:YES];

         // 調整 webview 的位置
         self.edgesForExtendedLayout = UIRectEdgeAll;
         if (@available(iOS 11.0, *)) {
             UIWebView *wb = (UIWebView *)[self psdContentView];
             wb.scrollView.contentInsetAdjustmentBehavior = UIScrollViewContentInsetAdjustmentNever;
         }else{
             self.automaticallyAdjustsScrollViewInsets = NO;
         }
     }

     // 修改默認返回按鈕文案顏色
     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]]) {
                 AUBarButtonItem *backItem = leftBarButtonItems[0];
                 backItem.titleColor = backButtonColor;
                 backItem.backButtonColor = backButtonColor;
             }
         }
     }

     // 設置標題顏色
     NSString *titleColorString = expandParams[@"titleColor"];
     if ([titleColorString isKindOfClass:[NSString class]] && [titleColorString length] > 0) {
         UIColor *titleColor = [UIColor colorFromHexString:titleColorString];
         id<NBNavigationTitleViewProtocol> titleView = self.navigationItem.titleView;
         [[titleView mainTitleLabel] setFont:[UIFont systemFontOfSize:16]];
         [[titleView mainTitleLabel] setTextColor:titleColor];
     }
 }

頁面打開后，在用戶操作的過程中動態修改導航欄樣式。主要通過自定義 JSAPI 的方式，調用 Native 接口方法進行修改。

自定義 JSAPI 對當前頁面導航欄樣式進行處理。

參考定制某一個頁面導航欄樣式提供的接口，在 JSAPI 中對原生導航欄進行處理：

- (void)handler:(NSDictionary *)data context:(PSDContext *)context callback:(PSDJsApiResponseCallbackBlock)callback
{
    [super handler:data context:context callback:callback];

    UIViewController *currentVC = context.currentViewController;
    currentVC.navigationItem.titleView = [[AUDoubleTitleView alloc] initWithTitle:@"主標題" detailTitle:@"副標題"];
    callback(@{@"success":@YES});
}

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定制 H5 頁面導航欄

前置條件

設置所有 H5 頁面導航欄默認樣式

定制某個 H5 頁面導航欄樣式