由於官方API提供的顯示模態彈窗，只能簡單地顯示文字內容，不能對對話框內容進行自定義，欠缺靈活性，所以自己從模態彈窗的原理角度來實現了自定義的模態對話框。
wx.showModal修改樣式后的效果，如下圖所示：
index.wxml代碼：
<!--index.wxml--> <button class="show-btn" bindtap="showDialogBtn">彈窗</button> <!--彈窗--> <view class="modal-mask" bindtap="hideModal" catchtouchmove="preventTouchMove" wx:if="{{showModal}}"></view> <view class="modal-dialog" wx:if="{{showModal}}"> <view class="modal-title">添加數量</view> <view class="modal-content"> <view class="modal-input"> <input placeholder-class="input-holder" type="number" maxlength="10" bindinput="inputChange" class="input" placeholder="請輸入數量"></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">確定</view> </view> </view> index.wxss樣式代碼：
/**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代碼如下：
//獲取應用實例 var app = getApp() Page({ data: { showModal: false, }, onLoad: function () { }, /** * 彈窗 */ showDialogBtn: function () { this.setData({ showModal: true }) }, /** * 彈出框蒙層截斷touchmove事件 */ preventTouchMove: function () { }, /** * 隱藏模態對話框 */ hideModal: function () { this.setData({ showModal: false }); }, /** * 對話框取消按鈕點擊事件 */ onCancel: function () { this.hideModal(); }, /** * 對話框確認按鈕點擊事件 */ onConfirm: function () { this.hideModal(); } })