微信提供了动画api,就是下面这个

相关链接:https://mp.weixin.qq.com/debug/wxadoc/dev/api/api-animation.html#wxcreateanimationobject
通过使用这个创建动画的api,可以做出很多特效出来
下面介绍一个抽屉菜单的案例
实现代码:
wxml:
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<view class="btn" bindtap="powerDrawer" data-statu="open">button</view>
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<view class="drawer_screen" bindtap="powerDrawer" data-statu="close" wx:if="{{showModalStatus}}"></view>
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<view animation="{{animationData}}" class="drawer_attr_box" wx:if="{{showModalStatus}}">
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<view class="drawer_content">
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<view class="drawer_title line">菜单1</view>
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<view class="drawer_title line">菜单2</view>
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<view class="drawer_title line">菜单3</view>
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<view class="drawer_title line">菜单4</view>
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<view class="drawer_title">菜单5</view>
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</view>
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</view>
wxss:
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.btn {
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width: 80%;
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padding: 20rpx 0;
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border-radius: 10rpx;
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text-align: center;
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margin: 40rpx 10%;
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background: #0C1939;
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color: #fff;
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}
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.drawer_screen {
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width: 100%;
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height: 100%;
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position: fixed;
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top: 0;
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left: 0;
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z-index: 1000;
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background: #000;
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opacity: 0.2;
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overflow: hidden;
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}
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.drawer_attr_box {
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width: 100%;
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overflow: hidden;
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position: fixed;
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bottom: 0;
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left: 0;
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z-index: 1001;
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background: #fff;
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}
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.drawer_content {
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padding: 20rpx 40rpx;
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height: 470rpx;
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overflow-y: scroll;
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}
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.drawer_title{
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padding:20rpx;
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font:42rpx "microsoft yahei";
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text-align: center;
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}
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.line{
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border-bottom: 1px solid #f8f8f8;
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}
js:
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Page({
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data: {
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showModalStatus: false
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},
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powerDrawer: function (e) {
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var currentStatu = e.currentTarget.dataset.statu;
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this.util(currentStatu)
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},
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util: function(currentStatu){
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var animation = wx.createAnimation({
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duration: 200,
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timingFunction: "linear",
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delay: 0
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});
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this.animation = animation;
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animation.translateY(240).step();
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this.setData({
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animationData: animation.export()
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})
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setTimeout(function () {
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animation.translateY(0).step()
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this.setData({
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animationData: animation
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})
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if (currentStatu == "close") {
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this.setData(
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{
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showModalStatus: false
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}
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);
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}
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}.bind(this), 200)
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if (currentStatu == "open") {
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this.setData(
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{
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showModalStatus: true
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}
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);
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}
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}
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})
效果:
