uitableview 上提下拉刷新
//// ChyoViewController.m// PullToRefresh//// Created by hsit on 12-1-30.// Copyright (c) 2012年 __MyCompanyName__. All rights reserved.//#import "ChyoViewController.h"@implementation ChyoViewController@synthesize tableView;@synthesize array;- (void)dealloc{ [tableView release]; [array release]; [super dealloc];}- (void)didReceiveMemoryWarning{ [super didReceiveMemoryWarning]; // Release any cached data, images, etc that aren't in use.}#pragma mark - View lifecycle- (void)viewDidLoad{ [super viewDidLoad]; array = [[NSMutableArray alloc] init]; tableView = [[PullToRefreshTableView alloc] initWithFrame:CGRectMake(0, 0, 320, 460)]; [table setContentSize:CGSizeMake(320, 960)]; tableView.delegate = self; tableView.dataSource = self; tableView.backgroundColor = [UIColor clearColor]; [self.view addSubview:tableView];}- (void)viewDidUnload{ [super viewDidUnload]; // Release any retained subviews of the main view. // e.g. self.myOutlet = nil;}- (void)viewWillAppear:(BOOL)animated{ [super viewWillAppear:animated];}- (void)viewDidAppear:(BOOL)animated{ [super viewDidAppear:animated];}- (void)viewWillDisappear:(BOOL)animated{[super viewWillDisappear:animated];}- (void)viewDidDisappear:(BOOL)animated{[super viewDidDisappear:animated];}- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation{ // Return YES for supported orientations return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);}- (void)updateThread:(NSString *)returnKey{ NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init]; sleep(2); switch ([returnKey intValue]) { case k_RETURN_REFRESH: [array removeAllObjects]; [array addObject:[NSString stringWithFormat:@"%d", [array count] + 1]]; break; case k_RETURN_LOADMORE: [array addObject:[NSString stringWithFormat:@"%d", [array count] + 1]]; break; default: break; } [self performSelectorOnMainThread:@selector(updateTableView) withObject:nil waitUntilDone:NO]; [pool release];}- (void)updateTableView{ if ([array count] < 10) { // 一定要调用本方法，否则下拉/上拖视图的状态不会还原，会一直转菊花 [tableView reloadData:NO]; } else { // 一定要调用本方法，否则下拉/上拖视图的状态不会还原，会一直转菊花 [tableView reloadData:YES]; }}#pragma mark -#pragma mark Scroll View Delegate- (void)scrollViewDidScroll:(UIScrollView *)scrollView{ [tableView tableViewDidDragging];}- (void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate{ NSInteger returnKey = [tableView tableViewDidEndDragging]; // returnKey用来判断执行的拖动是下拉还是上拖，如果数据正在加载，则返回DO_NOTHING if (returnKey != k_RETURN_DO_NOTHING) { NSString * key = [NSString stringWithFormat:@"%d", returnKey]; [NSThread detachNewThreadSelector:@selector(updateThread:) toTarget:self withObject:key]; }}#pragma mark -#pragma mark Table View DataSource - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView{ return 1;}- (NSInteger)tableView:(UITableView *)aTableView numberOfRowsInSection:(NSInteger)section{ if ([array count] == 0) { // 本方法是为了在数据未空时，让“下拉刷新”视图可直接显示，比较直观 tableView.contentInset = UIEdgeInsetsMake(k_STATE_VIEW_HEIGHT, 0, 0, 0); } return [array count];}- (UITableViewCell *)tableView:(UITableView *)aTableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{ static NSString * identifier = @"cell"; UITableViewCell * cell = [aTableView dequeueReusableCellWithIdentifier:@"cell"]; if (cell == nil) { cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:identifier] autorelease]; } NSInteger row = indexPath.row; cell.textLabel.text = [array objectAtIndex:row]; return cell;}@end