Text 데이터 줄수

 <Text
                            style= {{color:AppStyle.fontColorDarkGray}}
                            ellipsizeMode ={'tail'}
                            numberOfLines = {set_line}
                            onTextLayout={({ nativeEvent: { lines } }) =>
                            // console.log("lines",lines.length)
                            this.setState({ showMoreButton: lines.length > 3 })
                          }
                        >{data.iv_info}</Text>