vaukalak 26e8ae74b6 added onComplete callback to animation config
Summary:
This fix provides possibility to subscribe to a child animation lifecycle. You'll be able to observe every single animation:
```
Animated.sequence([
            Animated.timing(
                this.state.scale,
                {
                    toValue: 0,
                    duration: 300,
                    onComplete: () => this.setState({someProp: 'new value'})
                }
            ),
            Animated.timing(
                this.state.scale,
                {
                    toValue: 1,
                    duration: 300
                }
            ),
        ]).start();
```
`state.someProp`, will updated with `'new value'` when the first animation will be completed.
Closes https://github.com/facebook/react-native/pull/8494

Reviewed By: javache

Differential Revision: D3735322

Pulled By: foghina

fbshipit-source-id: fb69a4b993f7ab6a16da4fdd670e6c0b11c93517
2016-08-18 04:58:39 -07:00
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