Javascript 我发誓,为什么我会得到';然后';在这个例子中是未定义的吗?
我的chartDirective中有一个函数,它调用服务中的函数以获取数据,格式化该数据,然后从我的chartDirective中调用另一个函数:Javascript 我发誓,为什么我会得到';然后';在这个例子中是未定义的吗?,javascript,angularjs,asynchronous,promise,angular-promise,Javascript,Angularjs,Asynchronous,Promise,Angular Promise,我的chartDirective中有一个函数,它调用服务中的函数以获取数据,格式化该数据,然后从我的chartDirective中调用另一个函数: function chartTicker(ticker, disabled) { disabled = disabled || false; var defer = $q.defer(); // Clear out previous chart: d3.selectAll("svg > *").remove()
function chartTicker(ticker, disabled) {
disabled = disabled || false;
var defer = $q.defer();
// Clear out previous chart:
d3.selectAll("svg > *").remove();
document.getElementById('chart').innerHTML = "";
chart = {},
chartData = [];
// Get and format data for chart:
document.getElementById('chart').innerHTML = "<svg></svg>";
var timeInHours = TimeSpanFactory.getTimeHours();
var promise = FormatChartDataFactory.getData(ticker, timeInHours).then(function() {
defer.resolve();
return defer.promise;
});
}
这是我的
FormatChartDataFactory.getData
函数:
function getData(ticker, limit) {
var defer = $q.defer();
chartObj.chartData = [{}];
var limit_range = '';
if (limit > 0) {
limit_range = '?limit=' + limit;
}
getTickerPrice(ticker, limit_range).then(function() {
defer.resolve();
return defer.promise;
});
// GET Ticker data and return chartObj into drawChart:
////////////////////////////////////////////////////////////////////
function getTickerPrice(ticker, limit_range) {
return ApiFactory.getTickerQuotes(ticker.ticker, limit_range)
.success(function(data, status, headers, config) {
if (data.status === 'Success') {
// ....
下面是。承诺应该直接从代码返回,而不应该从
返回。然后是它的回调。简而言之,您还没有从函数返回承诺,您正在查找。然后,
方法出现错误
代码
//1st place
var promise = FormatChartDataFactory.getData(ticker, timeInHours).then(function() {
defer.resolve();
});
return defer.promise;
//2nd place
getTickerPrice(ticker, limit_range).then(function() {
defer.resolve();
});
return defer.promise;
哈哈,就是这样!这是历史上最快的回答:)@LeonGaban很高兴能帮助你..谢谢:)
//1st place
var promise = FormatChartDataFactory.getData(ticker, timeInHours).then(function() {
defer.resolve();
});
return defer.promise;
//2nd place
getTickerPrice(ticker, limit_range).then(function() {
defer.resolve();
});
return defer.promise;