var frutis = ["草莓", "柠檬", "菠萝"];
var vegetables = [{
    text: "番茄",
    value: "tomato"
}, {
    text: "蘑菇",
    value: "mushroom"
}, {
    text: "土豆",
    value: "potato"
}];

var picker1 = new WheelPicker({
    title: "最爱的水果",
    data: [frutis],
    onSelect: function(selected) {
        alert("你选择的是：" +  selected[0].text);
    }
});

var picker2 = new WheelPicker({
    title: "最爱的水果和蔬菜",
    el: "#demo",
    data: [frutis, vegetables],
    value: ["柠檬", "potato"],
    formatValue: function(value) {
        return "你选择的分别是：" +  value.join("、");
    }
});