//刷新一组
NSIndexSet* indexSet = [[NSIndexSetalloc]initWithIndex:1];
[self.myTableViewreloadSections:indexSetwithRowAnimation:UITableViewRowAnimationAutomatic];
//刷新一行
NSIndexPath*indexPath=[NSIndexPathindexPathForRow:1inSection:0];
[self.myTableViewreloadRowsAtIndexPaths:@[indexPath]withRowAnimation:UITableViewRowAnimationNone];