var arr = [];
if (data.FeedPics.charAt(data.FeedPics.length - 1) == ",") {
arr = data.FeedPics.substring(0, data.FeedPics.length - 1).split(",");
} else {
arr = data.FeedPics.split(",");
if (data.FeedPics.charAt(data.FeedPics.length - 1) == ",") {
arr = data.FeedPics.substring(0, data.FeedPics.length - 1).split(",");
} else {
arr = data.FeedPics.split(",");
}
判断最后一个是否有逗号，有逗号执行if条件里面，否则执行else里面
