[GitHub] songxing10000 commented on issue #1721: weex navigator如何清除导航堆栈

[GitBox]

songxing10000 commented on issue #1721: weex navigator如何清除导航堆栈
URL: https://github.com/apache/incubator-weex/issues/1721#issuecomment-441211235
 
 
   @anrananran 
   大约是这个样子
   ```objc
   /// 回到某个页面，原生页面，或者weex页面
   - (void)backToVC:(NSString *)vcClassName weexUrlString:(NSString 
*)weexUrlString {
       if ([vcClassName isEqualToString:@"KYWeexVC"]) {
           [self backToWeexVC:weexUrlString];
       }else{
           UINavigationController *nav = [weexInstance.viewController 
navigationController];
           NSArray <UIViewController *> *vcs = nav.childViewControllers;
           [vcs enumerateObjectsUsingBlock:^(UIViewController * _Nonnull vc, 
NSUInteger idx, BOOL * _Nonnull stop) {
               if ([vc isKindOfClass: NSClassFromString(vcClassName)]) {
                   [nav popToViewController:vc animated:NO];
               }
           }];
       }
   }
   /// 回到weex页面
   -(void)backToWeexVC:(NSString*)weexUrlString {
       NSString *pageid = [weexUrlString 
componentsSeparatedByString:@"?"].firstObject;
       KYWeexVC *popVC = nil;
       KYWeexVC *vc =  (KYWeexVC *)weexInstance.viewController;
       for (KYWeexVC *v in vc.navigationController.viewControllers) {
           if ([v isKindOfClass:[KYWeexVC class]]) {
               
               if([pageid isEqualToString:v.pageid]) {
                   
                   popVC = v;
               }
           }
       }
       /// 切换时，加上过度动画
       [[AppDelegate sharedInstance] addAnimationWhenSetWindowRootVC];
       
       if (popVC != nil) {
           [vc.navigationController popToViewController:popVC animated:NO];
       } else {
           /// 堆栈里没找到对应weex，强制设置
           KYWeexVC *mainVC = [KYWeexVC vcWithUrlString:weexUrlString];
           KYNavigationController *nav = [[KYNavigationController alloc] 
initWithRootViewController:mainVC];
           [AppDelegate delegate].window.rootViewController = nav;
       }
   }
   
   ```

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