由于官方API提供的显示模态弹窗，只能简单地显示文字内容，不能对对话框内容进行自定义，欠缺灵活性，所以自己从模态弹窗的原理角度来实现了自定义的模态对话框。
wx.showModal修改样式后的效果，如下图所示：
index.wxml代码：
<!--index.wxml-->
<button class="show-btn" bindtap="showDialogBtn">弹窗</button>
<!--弹窗-->
<view class="modal-mask" bindtap="hideModal" catchtouchmove="preventTouchMove" wx:if="{{showModal}}"></view>
<view class="modal-dialog" wx:if="{{showModal}}">
<view class="modal-title">添加数量</view>
<view class="modal-content">
<view class="modal-input">
<input placeholder-class="input-holder" type="number" maxlength="10" bindinput="inputChange" class="input" placeholder="请输入数量"></input>
</view>
</view>
<view class="modal-footer">
<view class="btn-cancel" bindtap="onCancel" data-status="cancel">取消</view>
<view class="btn-confirm" bindtap="onConfirm" data-status="confirm">确定</view>
</view>
</view>
index.wxss样式代码：
/**index.wxss**/
.show-btn {
margin-top: 100rpx;
color: #22cc22;
}
.modal-mask {
width: 100%;
height: 100%;
position: fixed;
top: 0;
left: 0;
background: #000;
opacity: 0.5;
overflow: hidden;
z-index: 9000;
color: #fff;
}
.modal-dialog {
width: 540rpx;
overflow: hidden;
position: fixed;
top: 50%;
left: 0;
z-index: 9999;
background: #f9f9f9;
margin: -180rpx 105rpx;
border-radius: 36rpx;
}
.modal-title {
padding-top: 50rpx;
font-size: 36rpx;
color: #030303;
text-align: center;
}
.modal-content {
padding: 50rpx 32rpx;
}
.modal-input {
display: flex;
background: #fff;
border: 2rpx solid #ddd;
border-radius: 4rpx;
font-size: 28rpx;
}
.input {
width: 100%;
height: 82rpx;
font-size: 28rpx;
line-height: 28rpx;
padding: 0 20rpx;
box-sizing: border-box;
color: #333;
}
input-holder {
color: #666;
font-size: 28rpx;
}
.modal-footer {
display: flex;
flex-direction: row;
height: 86rpx;
border-top: 1px solid #dedede;
font-size: 34rpx;
line-height: 86rpx;
}
.btn-cancel {
width: 50%;
color: #666;
text-align: center;
border-right: 1px solid #dedede;
}
.btn-confirm {
width: 50%;
color: #ec5300;
text-align: center;
}
index.js代码如下：
//获取应用实例
var app = getApp()
Page({
data: {
showModal: false,
},
onLoad: function () {
},
/**
* 弹窗
*/
showDialogBtn: function () {
this.setData({
showModal: true
})
},
/**
* 弹出框蒙层截断touchmove事件
*/
preventTouchMove: function () {
},
/**
* 隐藏模态对话框
*/
hideModal: function () {
this.setData({
showModal: false
});
},
/**
* 对话框取消按钮点击事件
*/
onCancel: function () {
this.hideModal();
},
/**
* 对话框确认按钮点击事件
*/
onConfirm: function () {
this.hideModal();
}
})
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