wxml
bindtap='preview'
js
preview:function(){
wx.previewImage({
// current: '', // 当前显示图片的http链接
urls: ["https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1507631423809&di=6d15ba1b2bba4ae6d226f1c5943ba743&imgtype=0&src=http%3A%2F%2Fuploads.xuexila.com%2Fallimg%2F1612%2F902-16120GA510.jpg"] // 需要预览的图片http链接列表
})