Taro 判断是否是iphonex

function testUA(str) {
    return navigator.userAgent.indexOf(str) > -1
}

function isIPhoneX() {
    if (isH5()) {
        return window.devicePixelRatio && window.devicePixelRatio === 3 && window.screen.width === 375 && testUA('iPhone')
    }
    const { model } = Taro.getSystemInfoSync()
    return model.search('iPhone X') != -1
}