swift insertRows and deleteRows注意事项

注意：self.datas是数据源

就是必须先处理数据源，再进行cell的操作。

 

  func switchButtonAction(isButtonOn:Bool){
        self.tableview.beginUpdates()
        if isButtonOn==true{
            var title2:String = "重置手势密码"
            self.datas.addObject(title2)
            
            var indexPaths:NSMutableArray = NSMutableArray()
            var indexPath:NSIndexPath = NSIndexPath(forRow:1,inSection:0)
            indexPaths.addObject(indexPath)
            self.tableview.insertRowsAtIndexPaths(indexPaths,withRowAnimation:.Top)
        }else{
            self.datas.removeLastObject()
            var indexPaths:NSMutableArray = NSMutableArray()
            var indexPath:NSIndexPath = NSIndexPath(forRow:1,inSection:0)
            indexPaths.addObject(indexPath)
            self.tableview.deleteRowsAtIndexPaths(indexPaths,withRowAnimation:.Middle)
            
            println("false")
        }
        self.tableview.endUpdates()
    }