可滚动视图区域。
使用竖向滚动时，需要给
示例代码：
vertical scroll
click me to scroll into view
click me to scroll
horizontal scroll
var order = ['red', 'yellow', 'blue', 'green', 'red']
Page({
data: {
toView: 'red',
scrollTop: 100
},
upper: function(e) { console.log(e)
},
lower: function(e) { console.log(e)
},
scroll: function(e) { console.log(e)
},
tap: function(e) { for (var i = 0; i < order.length; ++i) { if (order[i] === this.data.toView) { this.setData({
toView: order[i + 1]
}) break
}
}
},
tapMove: function(e) { this.setData({
scrollTop: this.data.scrollTop + 10
})
}
})
