wifiservice.js:
angular.module('app.WifiServices', [])
.factory('WifiService', function(){
var unique_array = angular.fromJson('[]');
function win_wifi(e){
alert("Success");
}
function fail_wifi(e){
alert("Error");
}
function connectWifi(wifi_ssid){
WifiWizard.connectNetwork(wifi_ssid, win_wifi, fail_wifi);
}
function listHandler(a){
var network_array = [];
for(var i=0; i<a.length; i++){
network_array.push("SSID: " + a[i].SSID + " Signal: " + a[i].level);
}
unique_array = network_array.filter(function(elem, pos) {
return network_array.indexOf(elem) == pos;
});
// alert("Wifi List Ready!");
}
function getScanResult(){
WifiWizard.getScanResults(listHandler, failNetwork);
}
function successNetwork(e){
window.setTimeout(function(){
getScanResult();
}, 3000);
}
function failNetwork(e){
alert("Network Failure: " + e);
}
window.setTimeout(function(){
WifiWizard.startScan(successNetwork, failNetwork);
}, 1000);
return {
list: function(){
return unique_array;
},
connectionToWifi: function(name){
connectWifi(name);
}
};
});
我的整个 Controller :
app.controller('WifiController', ['$scope', 'WifiService', function($scope, WifiService) {
$scope.wifiList = [];
window.setTimeout(function() {
$scope.wifiList = WifiService.list();
// alert($scope.wifiList);
$scope.$apply();
}, 5000);
$scope.getList = function() {
$scope.wifiList = WifiService.list();
return $scope.wifiList;
}
$scope.connectWifi = function(name) {
WifiService.connectionToWifi(name);
}
$scope.checkin = function() {
$scope.getList()
.then(function(result) {
console.log(result);
});
}
}]);
我想要做的是,调用 $scope.getList(),它返回周围 wifi SSID 的列表,然后在 $scope.checkin() 中我想处理这些数据。
由于扫描需要一些时间,我必须等待 getList 函数完成,这就是为什么我尝试使用 .then,但它给了我标题上所示的错误。有什么想法吗?
最佳答案
如何从基于回调的 API 创建 AngularJS Promise
从基于回调的 API 创建 AngularJS Promise,例如 WifiWizard.connectNetwork ,使用$q.defer :
function connectWifi(wifi_ssid) {
var future = $q.defer();
var win_wifi = future.resolve;
var fail_wifi = future.reject;
WifiWizard.connectNetwork(wifi_ssid, win_wifi, fail_wifi);
return future.promise;
};
上面的示例返回 $q Service promise 使用 API 的回调来解决或拒绝。
关于angularjs - 如何从基于回调的 API 创建 AngularJS Promise,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/43121872/