Javascript Cordova Angularjs:如何从CordovaSQLite获取值返回
目前我正在使用Angularjs框架开发cordova应用程序。我想获取返回值$cordovaSQLite.execute()函数。通常我使用.then(result())通过$cordovaSQLite.execute()获得return的值。但是,值result from.then(result())函数不能在外部.then(result())中使用。是否有任何解决方案可以让我获得像result.rows.item(0.UserName)这样的值;在我的.then(result())函数之外。下面是我的代码Javascript Cordova Angularjs:如何从CordovaSQLite获取值返回,javascript,angularjs,cordova,Javascript,Angularjs,Cordova,目前我正在使用Angularjs框架开发cordova应用程序。我想获取返回值$cordovaSQLite.execute()函数。通常我使用.then(result())通过$cordovaSQLite.execute()获得return的值。但是,值result from.then(result())函数不能在外部.then(result())中使用。是否有任何解决方案可以让我获得像result.rows.item(0.UserName)这样的值;在我的.then(result())函数之外
var channelNameQuery = "SELECT * FROM chat_friend WHERE UserName=?"
var channelNamePromise = $cordovaSQLite.execute(db, channelNameQuery, [channelName]).then(function (result){
var abc = result.rows.item(0).UserName;
console.log(abc);
})
接下来,我尝试使用以下代码来获取ChannelNamePromise值。它无法获取值
var abc = channelNamePromise.rows.item(0).UserName;
console.log(abc);
你可以这样做 让我们在AppCtrl中创建一个全局方法,以便可以在多个控制器中使用它
.controller('AppCtrl', function ($scope,$rootScope) {
$rootScope.getFromDB = function (channelName) {
var deferred = $q.defer();
var items = [];
var query = "SELECT * FROM chat_friend WHERE UserName=?";
$cordovaSQLite.execute(db, query, [channelName]).then(function (res)
{
for (var index = 0; index < res.rows.length; index++) {
var item = res.rows.item(index);
items.push(item);
}
deferred.resolve(items);
}, function (err) {
deferred.reject(items);
console.error(err);
});
return deferred.promise;
};
})
您还可以将结果分配给任何数组,如下所示
.controller('ExampleCtrl', function ($scope,$rootScope) {
$scope.resultArr = $rootScope.getFromDB('yourChannelName').then(function (data) {
$scope.resultArr = result; //do whatever you want here
});
//outside then block you can use it.
console.log("Result"+ $scope.resultArr);
})
你可以这样做 让我们在AppCtrl中创建一个全局方法,以便可以在多个控制器中使用它
.controller('AppCtrl', function ($scope,$rootScope) {
$rootScope.getFromDB = function (channelName) {
var deferred = $q.defer();
var items = [];
var query = "SELECT * FROM chat_friend WHERE UserName=?";
$cordovaSQLite.execute(db, query, [channelName]).then(function (res)
{
for (var index = 0; index < res.rows.length; index++) {
var item = res.rows.item(index);
items.push(item);
}
deferred.resolve(items);
}, function (err) {
deferred.reject(items);
console.error(err);
});
return deferred.promise;
};
})
您还可以将结果分配给任何数组,如下所示
.controller('ExampleCtrl', function ($scope,$rootScope) {
$scope.resultArr = $rootScope.getFromDB('yourChannelName').then(function (data) {
$scope.resultArr = result; //do whatever you want here
});
//outside then block you can use it.
console.log("Result"+ $scope.resultArr);
})