仿腾讯新闻下拉表格刷新数据.docx

在开发一个项目时，需要刷新一个UITableView的数据，看到腾讯新闻的那种下拉table释放就刷新数据的体验效果蛮好，所以就仿照腾讯新闻，做了一个这样的Demo，有需要的朋友可以下载。原 理是这样的：放一个UIView在表格的上面，同时，这个UIView会被UISegmentedControl挡住，看不到，当下拉表格的时候，触发 scrollViewDidScroll事件，在这个事件中，把UIView的位置随着拖动一起改变，然后当拖动到一定程度时，提示用户松开进行数据的刷 新，当用户松开之后，触发scrollViewDidEndDragging事件，进行数据刷新，当刷新完毕之后，将UIView的位置复原。效果图如下：开始界面?拖动表格界面释放理解刷新界面?正在刷新界面?代码如下：RefreshNewsViewController.h////? RefreshNewsViewController.h//? RefreshNews////? Created by walkman Apple on 11-1-6.//? Copyright 手机主题下载 2011. All rights reserved.//#import UIKit/UIKit.h@interface RefreshNewsViewController : UIViewController UITableViewDelegate,UITableViewDataSource{?UITableView *tableview;//表格?UISegmentedControl *titleSegment;?UIView* refreshView;?UILabel *statusLabel;?UIImageView *imgview;?BOOL isShoudRefresh;?UIImageView *SegmentBgView;?UIActivityIndicatorView *activeView;?bool isFinished;?NSInteger segSelectedIndex;}@property(nonatomic,retain)? UITableView *tableview;-(void)BeginGetData;-(void)BindData;-(void)hiddenview;-(void)CallWS;-(void)BeginThread;-(void)UpdateUI;@end?RefreshNewsViewController.m////? RefreshNewsViewController.m//? RefreshNews////? Created by walkman Apple on 11-1-6.//? Copyright 2011. All rights reserved.//#import RefreshNewsViewController.h#define ROWSCOUNT 50@implementation RefreshNewsViewController@synthesize tableview;/*// The designated initializer. Override to perform setup that is required before the view is loaded.- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {??? if ((self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil])) {??????? // Custom initialization??? }??? return self;}*//*// Implement loadView to create a view hierarchy programmatically, without using a nib.- (void)loadView {}*//*// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.*/?- (void)viewDidLoad {??? [super viewDidLoad];? self.title = @仿腾讯新闻下拉刷新数据演示;?? ? titleSegment = [[UISegmentedControl alloc]initWithFrame:CGRectMake(