下拉加载(刷新)下一页效果

1、导入EGO框架，即附件中的EGO.ZIP中的两个类文件，以及一些相应的图片，在第二个tableview.zip文件中

2、我的.h文件

#import <UIKit/UIKit.h>
#import "EGORefreshTableHeaderView.h"

@interface QuanWenArt : UIViewController<UITableViewDelegate, UITableViewDataSource,
    EGORefreshTableHeaderDelegate,UIScrollViewDelegate>
{
//    CGFloat   height;
    EGORefreshTableHeaderView *_refreshHeaderView;
	BOOL _reloading;
    NSInteger cellHeight;
}

@property (nonatomic, retain) UITableView *table;
@property (nonatomic ,retain) NSArray *data;

@end

 

3.我的.m文件

#import "QuanWenArt.h"
#import "AppDelegate.h"
#import "MyNav.h"
#import "JSON.h"

@interface QuanWenArt ()

@end

@implementation QuanWenArt

@synthesize table = _table;
@synthesize data = _data;

-(void)dealloc
{
    [super dealloc];
    [_table release];
    [_data release];
}

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        NSLog(@"----------------------------------------------------------");
        self.navigationItem.title = @"文章";
//        [self.navigationItem.backBarButtonItem setBackButtonBackgroundImage:[UIImage imageNamed:@"navbar.png"]
//                                                                   forState:UIControlStateNormal
//                                                                 barMetrics:UIBarMetricsDefault];
        
//        //自定义返回按钮
        UIButton *backButton = [UIButton buttonWithType:UIButtonTypeCustom];
        backButton.frame =  CGRectMake(0, 0, 68, 31);
        backButton.backgroundColor = [UIColor clearColor];
        [backButton setBackgroundImage:[UIImage imageNamed:@"btn_back.png"] forState:UIControlStateNormal];
        [backButton addTarget:self action:@selector(backAction) forControlEvents:UIControlEventTouchUpInside];
        UIBarButtonItem *backBarButton = [[UIBarButtonItem alloc] initWithCustomView:backButton];
        self.navigationItem.leftBarButtonItem = backBarButton;
        
        
        
    }
    return self;
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    NSLog(@"这里是QuanWenArt类的viewDidLoad方法");
	self.table = [[[UITableView alloc] initWithFrame: CGRectMake(0.0, 0.0, 320.0, 480.0) style: UITableViewStylePlain] autorelease];
    self.table.delegate = self;
    self.table.dataSource = self;
    self.view = self.table;
    
    //初始化数据源
    AppDelegate *delegate= [[UIApplication sharedApplication] delegate];
    self.data = delegate.artsOfQWData;
//    NSLog(@"list is：%@",self.data);
    
    //增加下拉刷新加载数据  1；
    _refreshHeaderView=[[EGORefreshTableHeaderView alloc] initWithFrame:
						CGRectMake(0, 440, 320, 480)];
	_refreshHeaderView.delegate=self;
	[self.table addSubview:_refreshHeaderView];
	
	[_refreshHeaderView refreshLastUpdatedDate];
}

-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return self.data.count;
}

-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier: @"cell"]; //获取cell
    [ cell setBackgroundColor:[ UIColor blueColor ] ] ;
    
    //每次都要清空一下，否则cell中的内容会重叠
    for (UIView *subview in [cell.contentView subviews])
        [subview removeFromSuperview];
    
    if (cell == nil)
    {
        cell = [[[UITableViewCell alloc] initWithStyle: UITableViewCellStyleValue1 reuseIdentifier: @"cell"] autorelease];
    }
    cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;   //表格单元右侧的披露按钮
    cell.selectionStyle = UITableViewCellSelectionStyleGray;
    
    int selectedIndex = [indexPath indexAtPosition: 1]; //获取行号
    for (int i=0; i<self.data.count; i++) {
        if (i == selectedIndex) {
            NSDictionary *dict = [self.data objectAtIndex:i];
//            NSString *idstr = [dict objectForKey:@"id"];
            NSString *titlestr = [dict objectForKey:@"title"];
//            NSString *authorstr = [dict objectForKey:@"author"];
//            NSLog(@"id=%@,title=%@,author=%@",idstr,titlestr,authorstr);
            cell.textLabel.text = titlestr;
            cellHeight = cell.frame.size.height;
            break;
        }
    }
    
    return cell;
}

- (void)backAction
{
    [self.navigationController popViewControllerAnimated:YES];
}

//此方法是开始读取数据 增加下拉刷新加载数据  2；
- (void)reloadTableViewDataSource
{
    NSLog(@"start");
    _reloading = YES;
    //打开线程，读取下一页数据
	[NSThread detachNewThreadSelector:@selector(requestNext) toTarget:self withObject:nil];
}

//增加下拉刷新加载数据  3；
- (void)requestNext
{
    NSAutoreleasePool * pool=[[NSAutoreleasePool alloc] init];
    //请求下一页数据
    NSMutableURLRequest *req = [[NSMutableURLRequest alloc] init];
    NSString *strURL = [NSString stringWithFormat:@"http://192.168.1.49:8080/exz/xmlli?fl=exz-qw-tb&op=new&ps=10&pn=2"];
    NSURL *connection = [[NSURL alloc] initWithString:strURL];
    
    [req setURL:connection];
    [req setHTTPMethod:@"GET"];
    
    NSURLResponse *rep = nil;
    NSError *error = nil;
    NSData *data = [NSURLConnection sendSynchronousRequest:req
                                         returningResponse:&rep
                                                     error:&error];
    
    if(error)
    {
        NSLog(@"服务器请求失败");
    }else {
        if (data) {
            NSLog(@"服务器请求成功");
            NSString *jsonStr = [[NSString alloc] initWithData:data
                                                      encoding:NSUTF8StringEncoding];
            NSArray *arr = [jsonStr JSONValue];
            AppDelegate *delegate= [[UIApplication sharedApplication] delegate];
            [delegate.artsOfQWData addObjectsFromArray:arr];
            self.data = delegate.artsOfQWData;
            [jsonStr release];  
        }
    }
    
    [pool release];
    //回到主线程跟新界面
	[self performSelectorOnMainThread:@selector(dosomething) withObject:nil waitUntilDone:YES];
}

//增加下拉刷新加载数据  4;
-(void)dosomething
{
	
	int count=[self.data count];
    NSString *str1 = [NSString stringWithFormat:@"%d",count];
    NSString *str2 = [NSString stringWithFormat:@"%d",self.table.contentSize.height];
    NSLog(@"-->%@",str1);
    NSLog(@"-->%@",str2);
//	
//	if(100*count>2000)
//	{
//		
//        self.table.contentSize=CGSizeMake(320, 40*count);
    //设置显示上来加载那一块view的CGRECT
		_refreshHeaderView.frame=CGRectMake(0, cellHeight*count, 320, 480);
		
//	}
	[self.table reloadData];
    [self performSelector:@selector(doneLoadingTableViewData) withObject:nil afterDelay:0];
}

//此方法是结束读取数据
- (void)doneLoadingTableViewData{
	
	//  model should call this when its done loading
	_reloading = NO;
	[_refreshHeaderView egoRefreshScrollViewDataSourceDidFinishedLoading:self.table];
	NSLog(@"end");
	
}

#pragma mark -
#pragma mark UIScrollViewDelegate Methods

- (void)scrollViewDidScroll:(UIScrollView *)scrollView{	
	
	[_refreshHeaderView egoRefreshScrollViewDidScroll:self.table];
	
}

- (void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate{
	
	[_refreshHeaderView egoRefreshScrollViewDidEndDragging:self.table];
	
}


#pragma mark -
#pragma mark EGORefreshTableHeaderDelegate Methods

- (void)egoRefreshTableHeaderDidTriggerRefresh:(EGORefreshTableHeaderView*)view{
	
	[self reloadTableViewDataSource];
	//[self performSelector:@selector(doneLoadingTableViewData) withObject:nil afterDelay:0.5];
	
}

- (BOOL)egoRefreshTableHeaderDataSourceIsLoading:(EGORefreshTableHeaderView*)view{
	
	return _reloading; // should return if data source model is reloading
	
}

- (NSDate*)egoRefreshTableHeaderDataSourceLastUpdated:(EGORefreshTableHeaderView*)view{
	
	return [NSDate date]; // should return date data source was last changed
	
}

- (void)viewDidUnload
{
    [super viewDidUnload];
    // Release any retained subviews of the main view.
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    return (interfaceOrientation == UIInterfaceOrientationPortrait);
}

@end