怎么判断进入围栏,离开围栏,谁有demo?求demo.........................................................怎么判断进入围栏,离开围栏,谁有demo?求demo.........................................................
http://wenku.baidu.com/link?url=n1SwY9B8VPVM8o5yoUHz8ed5Yjv_WUxidfokX3Yll36kA1betfaD-DBqrGjJp1hLRLMoDZvqngiw4sgPw8bt2dVFSt7sSLao30OndsbTnj7