axios.get( "area.json" ).then(function ( response ) {
    iPicker("#target", {
        data: response.data,
        type: "cascader"//主题
        selected: [ "230000", "230100", "230103" ],
        // selected: [ "黑龙江省", "哈尔滨市", "南岗区" ]
        onSelect: function ( code, name, all ) {
            // 有三种返回值（均为数组形式）
            console.log( code );
            console.log( name );
            console.log( all );
        }
    });
})