您好我试图调用相同类型的后续函数传递参数,如示例所示:
问题是即时获取随机输出,如Line3,Line4,Line1,Line2。我是否做错了链接是否是每个文本呈现到屏幕的延迟问题?我应该使用npm睡眠吗?
var function1 = (senderID,req,FB_ID) => {
return new Promise((resolve,reject) => {
var line1 = 'Line1';
var line2 = 'Line2';
var line3 = 'Line3';
var line4 = 'Line4';
// Display lines of text
sendTextMessage(senderID,line1)
.then(sendTextMessage(senderID,line2))
.then(sendTextMessage(senderID,line3))
.then(sendTextMessage(senderID,line4))
.then(resolve());
});
};
每个sendTextMessage调用都会调用以下函数:
var sendTextMessage = (recipientId, messageText) => {
return new Promise((resolve,reject) => {
var messageData = {
recipient: {
id: recipientId
},
message: {
text: messageText
}
};
callSendAPI(messageData).then(function(){
resolve();
});
});
};
CALLSENDAPI:
var callSendAPI = (messageData) => {
var sleepSec = 1;
return new Promise((resolve,reject) => {
request({
uri: 'https://graph.facebook.com/v2.6/me/messages',
qs: { access_token: process.env.FB_PAGE_TOKEN },
method: 'POST',
json: messageData
}, function (error, response, body) {
if (!error && response.statusCode == 200) {
//var recipientId = body.recipient_id;
//var messageId = body.message_id;
sleep.sleep(sleepSec);
resolve();
} else {
console.error("Unable to send message.");
console.error(response);
console.error(error);
reject(error);
}
});
});
}; // func
答案 0 :(得分:5)
问题是你作为O(N log N)
参数放置的内容会立即被执行,而你应该传递一个函数。
您可以使用then
来避免过于冗长的匿名函数:
bind
另外,请注意最后的sendTextMessage(senderID,line1)
.then(sendTextMessage.bind(null, senderID,line2))
.then(sendTextMessage.bind(null, senderID,line3))
.then(sendTextMessage.bind(null, senderID,line4))
.then(resolve);
,没有括号:您希望传递该功能,而不是执行。