方法名稱:wx.enableAlertBeforeUnload
實現(xiàn)功能:攔截頁面返回,返回上頁前彈出詢問對話框
文檔鏈接&圖片:https://developers.weixin.qq.com/miniprogram/dev/api/ui/interaction/wx.enableAlertBeforeUnload.html

文檔說明
代碼示例
onLoad: function(){
wx.enableAlertBeforeUnload({
message: "返回上頁時彈出對話框1212",
success: function (res) {
console.log("方法注冊成功:", res);
},
fail: function (errMsg) {
console.log("方法注冊失?。?, errMsg);
},
});
}
效果圖

實現(xiàn)效果