NativeScript / NativeScript/angular

Outlets freeze when navigate to a nested route from another tab, only on Android

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まだ誰も着手していません。

bug-pending-triage
主要言語
TypeScript
スター
55
フォーク
13
平均マージ
16分
マージ済み PR(30日)
1

説明

Issue Description

Outlets freeze when we navigate to a nested route from another TabView only on Android. We have 5 tabs and 2 of them has nested routes. We use page-router-outlet and native/core TabView component.

Steps to reproduce:
Go to Tab 5 -> drill down 3 levels to the nested route -> click the button to navigate to Tab 2, which takes you to Tab 2 w/o any issues-> Go back to Tab 5, you are on the last screen (nested route) but it freezes. You can't go back or can't do anything on the screen. However on iOS, instead of freezing, it goes all the way back to the main outlet.
So apparently the iOS behavior is the intentional behavior of tabView, because tabView keeps only 1 view alive and it's the main outlets in our case?

Our tabView has the androidTabsPosition="bottom" option and we realized that this sets androidOffscreenTabLimit to 1 automatically, so it means only the current tab is alive. I tried adding the androidOffscreenTabLimit="3" option to the tabView (because we have max 3 level nested navigation on Tab 5) , the tabs are not frozen anymore, BUT now the interface jumps back to the main outlet (just like iOS). Any idea how to solve this ?

Also a side note, this started happening after NativeScript 8 upgrade. We were using bottomnavigationbar with NS7 but we had to change to tabView with NS8. We didn't have any freezing or jumping back to the main outlet issues before the update.

Any insight will be appreciated, thanks so much!

Reproduction

No response

Relevant log output (if applicable)

No response

Environment
node: 14.15.0
npm: 7.6.1
nativescript: 8.1.2

### Dependencies

```json
"dependencies": {
  "@angular/animations": "~13.1.1",
  "@angular/common": "~13.1.1",
  "@angular/compiler": "~13.1.1",
  "@angular/core": "~13.1.1",
  "@angular/forms": "~13.1.1",
  "@angular/platform-browser": "~13.1.1",
  "@angular/platform-browser-dynamic": "~13.1.1",
  "@angular/router": "~13.1.1",
  "@nativescript-community/ui-material-bottomnavigationbar": "^6.2.5",
  "@nativescript/angular": "^13.0.0",
  "@nativescript/core": "~8.1.1",
  "@nativescript/email": "^2.0.5",
  "@nativescript/geolocation": "^8.0.2",
  "@nativescript/theme": "~3.0.1",
  "@nstudio/nativescript-cardview": "^2.0.1",
  "@nstudio/nativescript-floatingactionbutton": "^3.0.4",
  "moment": "^2.29.1",
  "nativescript-mapbox-sdk": "file:../well-finder-smartphone-app-.nativescript-mapbox-sdk/src",
  "nativescript-ripple": "^4.0.1",
  "nativescript-ui-sidedrawer": "^10.0.2",
  "nativescript-windowed-modal": "^7.0.0",
  "rxjs": "~7.4.0",
  "zone.js": "~0.11.4"
},
"devDependencies": {
  "@angular-devkit/build-angular": "~13.1.1",
  "@angular/compiler-cli": "~13.1.1",
  "@nativescript/android": "8.1.1",
  "@nativescript/debug-ios": "^1.0.0",
  "@nativescript/ios": "8.1.0",
  "@nativescript/types": "~8.1.1",
  "@nativescript/webpack": "~5.0.0",
  "@ngtools/webpack": "~13.1.1",
  "@types/geojson": "^7946.0.8",
  "node-sass": "^7.0.1",
  "typescript": "~4.4.4"
}
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調査の方向性

まず、NativeScript 8.1.2、ネイティブ/core TabView、page-router-outlet、5 つのタブ、Android 上のネストされたルートを使って、報告されたフローを再現します。androidOffscreenTabLimit の値 1 と 3 を比較し、Tab 2 からネストされた Tab 5 のルートに戻ったときに、フリーズしたり予期せず main outlet に戻ったりしないことを確認します。

索引モデルが issue の本文から書いたものです。

評価

技術スタック
angular, typescript
領域
frontend, mobile-dev
issue の種類
バグ
難易度
4/5
見積もり時間
3〜5日
活発さ
停滞
明瞭さ
おおむね明確
初心者へのやさしさ
35/100

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