官方demo禁用上拉加载，真机运行BUG

官方hello mui DEMO 里面pullrefresh.html中，
28行muI.init初始化后
调用mui('#pullrefresh').pullRefresh().disablePullupToRefresh();
-28 mui.init({
-29 pullRefresh: {
-30 container: '#pullrefresh',
-31 down: {
-32 style:'circle',
-33 callback: pulldownRefresh
-34 },
-35 up: {
-36 auto:true,
-37 contentrefresh: '正在加载...',
-38 callback: pullupRefresh
-39 }
-40 }
-41 });
-42 mui('#pullrefresh').pullRefresh().disablePullupToRefresh();
在真机运行时，会报错，提示：
mui(...).pullRefresh(...).disablePullupToRefresh is not a function at examples/pullrefresh.html:42
mui版本3.70
我的测试机子为ZUK Z1