例子：
function main() {
    requestScreenShot();
    var ret = ocr(100, 100, 200, 130);
    console.log('ret:' + ret);
}

var key = '', secret = '';
function main() {
    requestScreenShot();

    // 从自定义数据中获取key。您需要去冰狐官网创建自定义数据并填入key
    key = getCustomData('custom_data_key')

    // 从自定义数据中获取secret。您需要去冰狐官网创建自定义数据并填入secret
    secret = getCustomData('custom_data_secret')

    var ocrResult = screenShot(cbDealImage)
    console.log('ocrResult:', ocrResult)
}

// 截屏处理函数，data为截屏后的png数据
function cbDealImage(data) {
    var r = base64Encode(data)
    // 注意这里不需要调用urlEncode，因为httpPost默认会自动调用urlEncode

    var ret = httpPost('https://aip.baidubce.com/oauth/2.0/token?grant_type=client_credentials&client_id=' + key '&client_secret=' + secret, null, {"Content-Type":"application/json", "Accept":"application/json"})
    if (ret.state == "success") {
        var data = JSON.parse(ret.data);
        var token = data.access_token;
        console.log('token:', token)
        var ret = httpPost('https://aip.baidubce.com/rest/2.0/ocr/v1/general_basic?access_token=' + token, {image:r}, {"Content-Type":"application/x-www-form-urlencoded"})
        console.log('req:', ret)
        if (ret.state == 'success') {
            var data = JSON.parse(ret.data)
            var result = data.words_result;
            console.log('data:', result)
            return result;
        }
    }
    return null;
}

例子：
function main() {
    requestScreenShot();
    var ret = ocrSwitchPage('查看', '数据分析|首页');
    console.log('ret:' + ret);
}

例子：
function main() {
    requestScreenShot();
    var ret = ocrBack2Page('首页');
    console.log('ret:' + ret);
}