gistfile1.txt

            <View style={{borderTopColor:'black', borderWidth: 0.5, height:130}}>
              <Text>Firma</Text>
               <SignatureCapture
                    style={[{flex:1},styles.signature]}
                    ref="sign"
                    onSaveEvent={this._onSaveEvent}
                    onDragEvent={this._onDragEvent}
                    saveImageFileInExtStorage={false}
                    showNativeButtons={false}
                    showTitleLabel={true}
                    viewMode={"portrait"}/>
            </View>

const styles = StyleSheet.create({
h1: {
fontSize:15,
fontWeight: 'bold',
color: 'black',
marginTop:10,
paddingLeft: 10
},
pdf: {
flex:1
},
paragraph: {
color: 'black',
paddingLeft: 10,
paddingRight: 10
},
container: {
flex: 1,
alignItems: 'center',
justifyContent: 'space-between',

},
signature: {
flex: 1,
borderColor: '#000033',
borderWidth: .2,
},
video: {
marginTop: 20,
maxHeight: 200,
width: 320,
flex: 1
},
button: {
width: 200,
marginTop: 30,
marginLeft: 70,
backgroundColor: '#2185d0'
}
})