javascript - 如何在iPhone的phonegap应用程序中的javascript中读取sqlite3的数据

Question

我正在 iPhone 的phonegap 中开发一个应用程序，其中我有一个sqlite3 数据库，其中包含纬度和经度值以及相应的区域名称。我已在应用程序中复制了 sqlite 数据文件。我需要从sqlite中获取数据并将表中的数据显示在 View 中，那么如何在javascript中获取数据呢？

Answer 1

@PiTheNumber 尝试该代码

         var arr = new Array(); 
        // Wait for PhoneGap to load
        //
        document.addEventListener("deviceready", onDeviceReady, false);

        // Populate the database 
        //
        function populateDB(tx) {
            tx.executeSql('DROP TABLE IF EXISTS DEMO');
            tx.executeSql('CREATE TABLE IF NOT EXISTS DEMO (id unique, data)');
            tx.executeSql('INSERT INTO DEMO (id, data) VALUES (1, "First row")');
            tx.executeSql('INSERT INTO DEMO (id, data) VALUES (2, "Second row")');
            tx.executeSql('INSERT INTO DEMO (id, data) VALUES (3, "First row")');
            tx.executeSql('INSERT INTO DEMO (id, data) VALUES (4, "Second row")');
            tx.executeSql('INSERT INTO DEMO (id, data) VALUES (5, "First row")');
            tx.executeSql('INSERT INTO DEMO (id, data) VALUES (6, "Second row")');
            tx.executeSql('INSERT INTO DEMO (id, data) VALUES (7, "First row")');
            tx.executeSql('INSERT INTO DEMO (id, data) VALUES (8, "Second row")');
            tx.executeSql('INSERT INTO DEMO (id, data) VALUES (9, "First row")');
            tx.executeSql('INSERT INTO DEMO (id, data) VALUES (10, "Second row")');
            tx.executeSql('INSERT INTO DEMO (id, data) VALUES (11, "First row")');
            tx.executeSql('INSERT INTO DEMO (id, data) VALUES (12, "Second row")');
            tx.executeSql('INSERT INTO DEMO (id, data) VALUES (13, "First row")');
            tx.executeSql('INSERT INTO DEMO (id, data) VALUES (14, "Second row")');
            tx.executeSql('INSERT INTO DEMO (id, data) VALUES (15, "First row")');
            tx.executeSql('INSERT INTO DEMO (id, data) VALUES (16, "Second row")');
        }



        // Query the database
        //
        function queryDB(tx) {
            tx.executeSql('SELECT * FROM DEMO', [], querySuccess, errorCB);
        }

        // Query the success callback
        //
        function querySuccess(tx, results) {
            var len = results.rows.length;
            console.log("DEMO table: " + len + " rows found.");
            for (var i=0; i<len; i++){
            $('#home').append('<li><a href="#artists">'+results.rows.item(i).data+'</a></li>');



            }
            console.log("aaa"+arr+"aaa"); 

        }

        // Transaction error callback
        //
        function errorCB(err) {
            console.log("Error processing SQL: "+err.code);
        }

        // Transaction success callback
        //
        function successCB() {
            var db = window.openDatabase("Database", "1.0", "PhoneGap Demo", 200000);
            db.transaction(queryDB, errorCB);
        }

        // PhoneGap is ready
        //
        function onDeviceReady() {
            var db = window.openDatabase("Database", "1.0", "PhoneGap Demo", 200000);
            db.transaction(populateDB, errorCB, successCB);
        }