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react-native/Examples/UIExplorer
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alvaromb e52cab5a7f Adds the ability to use UIManager to check if a node is an ancestor 
Summary:
Sometimes is handy to check if a React node is a descendant of another node or not. For instance, I want to check if the focused `TextInput` is descendant of an specific `ScrollView`:

```js
const currentlyFocusedField = TextInput.State.currentlyFocusedField()
UIManager.viewIsAncestorOf(
  currentlyFocusedField,
  this.getInnerViewNode(),
  (isAncestor) => {
    if (isAncestor) {
      console.log('The focused field is a descendant of this ScrollView!')
    }
  }
)
```

This function uses the same strategy as the `measureLayout` method to check if one node is an ancestor of other node. As the `measureLayout` method, this is performed outside the main thread.

By now I've only implemented the iOS version and its tests, but if this function is going to be merged I'll implement the Android version too. I have objc experience but no Java or Android, so I prefer to validate this functionality before jumping into developing the Android part.
Closes https://github.com/facebook/react-native/pull/7876

Differential Revision: D3662045

Pulled By: javache

fbshipit-source-id: b9668e8ea94fd01db76651f16243926cf9c2566f
 		2016-08-03 04:13:43 -07:00
..
UIExplorer Fix UIExplorer entry file on iOS 2016-07-17 01:43:28 -07:00
UIExplorer.xcodeproj fix UIExplorer build path 2016-07-19 01:58:36 -07:00
UIExplorerIntegrationTests Add MessageQueue method for executing function and returning its result 2016-07-18 07:13:32 -07:00
UIExplorerUnitTests Adds the ability to use UIManager to check if a node is an ancestor 2016-08-03 04:13:43 -07:00
android/app Cleanup UIExplorer folder 2016-07-12 05:59:13 -07:00
js ActivityIndicator Example ES6 classes migration and TimerMixin removal 2016-08-02 17:13:30 -07:00
README.md Allow building UIExplorer with Buck 2016-04-12 13:05:24 -07:00

README.md

UIExplorer

The UIExplorer is a sample app that showcases React Native views and modules.

Running this app

Before running the app, make sure you ran:

git clone https://github.com/facebook/react-native.git
cd react-native
npm install

Running on iOS

Mac OS and Xcode are required.

  • Open Examples/UIExplorer/UIExplorer.xcodeproj in Xcode
  • Hit the Run button

See Running on device if you want to use a physical device.

Running on Android

You'll need to have all the prerequisites (SDK, NDK) for Building React Native installed.

Start an Android emulator (Genymotion is recommended).

cd react-native
./gradlew :Examples:UIExplorer:android:app:installDebug
./packager/packager.sh

Note: Building for the first time can take a while.

Open the UIExplorer app in your emulator.

See Running on Device in case you want to use a physical device.

Running with Buck

Follow the same setup as running with gradle.

Install Buck from here.

Run the following commands from the react-native folder:

./gradlew :ReactAndroid:packageReactNdkLibsForBuck
buck fetch uiexplorer
buck install -r uiexplorer
./packager/packager.sh

Note: The native libs are still built using gradle. Full build with buck is coming soon(tm).

Built from source

Building the app on both iOS and Android means building the React Native framework from source. This way you're running the latest native and JS code the way you see it in your clone of the github repo.

This is different from apps created using react-native init which have a dependency on a specific version of React Native JS and native code, declared in a package.json file (and build.gradle for Android apps).