有没有demo，网上找了很多demo，都以失败告终，求可以直接放到项目中的demo
http://www.kamrat.com/test/iScroll5/iscroll5-pull-test.html
http://pnc.co.il/dev/iscroll-5-pull-to-refresh-and-infinite-demo.html
http://cubiq.org/dropbox/iscroll4/examples/pull-to-refresh/
http://jsfiddle.net/kL28ct7b/
http://ask.dcloud.net.cn/article/141
http://www.cnblogs.com/sword-successful/archive/2015/06/30/4609498.html
http://blog.csdn.net/tiw163/article/details/43341759
https://github.com/cubiq/iscroll
iScroll http://cubiq.org/iscroll-5