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July 7, 2017 09:53
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sync react native component height
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usage: | |
static propTypes = { | |
SyncHeight: PropTypes.any, | |
} | |
static defaultProps = { | |
SyncHeight: View | |
} | |
render(){ | |
return (<SyncHeight name="product" style={styles.productImage}> | |
<Touchable type="opacity" onPress={this.handlePress} activeOpacity={0.8}> | |
<CommonImage width={this.props.baseWidth} source={{ uri: pic }} /> | |
</Touchable> | |
</SyncHeight>); | |
} | |
const heightMap = {}; | |
class SyncHeight extends Component { | |
static propTypes = { | |
name: PropTypes.string.isRequired, | |
children: PropTypes.object.isRequired, | |
style: PropTypes.oneOfType([ | |
PropTypes.number, | |
PropTypes.object, | |
]), | |
} | |
static defaultProps={ | |
style: {} | |
} | |
constructor(...args) { | |
super(...args); | |
this.state = { minHeight: 0 }; | |
this.setHeight = this.setHeight.bind(this); | |
this.onLayoutWrap = this.onLayoutWrap.bind(this); | |
} | |
onLayout(height, name) { | |
const style = StyleSheet.flatten(this.props.style); | |
let bonus = 0; | |
if (style.borderWidth) { | |
bonus += style.borderWidth * 2; | |
}else { | |
if (style.borderTopWidth) { | |
bonus += style.borderTopWidth; | |
} | |
if (style.borderTopWidth) { | |
bonus += style.borderBottomWidth; | |
} | |
} | |
height += bonus; | |
if (!heightMap[name]) { | |
heightMap[name] = { | |
height, | |
queue: [], | |
}; | |
} | |
const target = heightMap[name]; | |
target.queue.push(this.setHeight); | |
if (height <= target.height) { | |
this.setHeight(target.height); | |
return; | |
} | |
target.height = height; | |
target.queue.forEach((cb) => { | |
if (cb !== this.setHeight) { | |
cb(height); | |
} | |
}); | |
} | |
onLayoutWrap(event) { | |
if (event.nativeEvent && event.nativeEvent.layout) { | |
const height = event.nativeEvent.layout.height; | |
this.onLayout(height, this.props.name); | |
} | |
} | |
setHeight(minHeight) { | |
this.setState({ | |
minHeight | |
}); | |
} | |
render() { | |
return (<View style={[this.props.style, { minHeight: this.state.minHeight }]}> | |
<View onLayout={this.onLayoutWrap}> | |
{this.props.children} | |
</View> | |
</View>); | |
} | |
} |
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