public function call($api, $param = '', $method = 'GET')
{
/* 腾讯QQ调用公共参数 */
$params = ['oauth_consumer_key' => $this->AppKey, 'access_token' => $this->token['access_token'], 'openid' => $this->openid(), 'format' => 'json'];
$data = $this->http($this->url($api), $this->param($params, $param), $method);
return json_decode($data, true);
}