UITableview pull up and down load data(UITableview上拉下拉加载数据)

demo:https://github.com/MartinLi841538513/PullDownAndUpLoadDataInTableView

这里引入了一个第三方：MJRefresh，着实好用，稳定。（不多说，代码再次，一看就明白了）

//
//  RewardRecordsViewController.m
//  Club
//
//  Created by dongway on 14-8-15.
//  Copyright (c) 2014年 martin. All rights reserved.
//

#import "RewardRecordsViewController.h"
#import "RewardCell.h"
#import "MJRefresh.h"
#import "InternetRequest.h"
#import "SVProgressHUD.h"

@interface RewardRecordsViewController ()
{
    
    __weak IBOutlet UITableView *tableview;
    NSMutableArray *datas;
    NSString *identifier;
    NSInteger page;
}
@end

@implementation RewardRecordsViewController

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}

-(void)loadView{
    [super loadView];
    identifier = @"RewardCell";
    UINib *nib = [UINib nibWithNibName:@"RewardCell" bundle:nil];
    [tableview registerNib:nib forCellReuseIdentifier:identifier];
    tableview.delegate = self;
    tableview.dataSource = self;
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    self.title = @"中奖记录";
    datas = [[NSMutableArray alloc] init];
    page = 0;
    [self setupRefresh];
}

/**
 *  集成刷新控件
 */

- (void)setupRefresh

{

    // 1.下拉刷新(进入刷新状态就会调用self的headerRereshing)

    [self.tableview addHeaderWithTarget:self action:@selector(headerRereshing)];

    [self.tableview headerBeginRefreshing];

    // 2.上拉加载更多(进入刷新状态就会调用self的footerRereshing)

    [self.tableview addFooterWithTarget:self action:@selector(footerRereshing)];    

    // 设置文字(也可以不设置,默认的文字在MJRefreshConst中修改)

    self.tableview.headerPullToRefreshText = @"下拉可以刷新了";

    self.tableview.headerReleaseToRefreshText = @"松开马上刷新了";

    self.tableview.headerRefreshingText = @"正在帮你刷新中";

    self.tableview.footerPullToRefreshText = @"上拉可以加载更多数据了";

    self.tableview.footerReleaseToRefreshText = @"松开马上加载更多数据了";

    self.tableview.footerRefreshingText = @"正在帮你加载中";

}

#pragma mark 开始进入刷新状态
- (void)headerRereshing
{
    page = 1;
    NSString *pageString = [NSString stringWithFormat:@"%d",page];
    NSString *urlString = [NSString stringWithFormat:@"http://earea.stcyclub.com/wap.php/Prize/mylucky?mid=%@&page=%@",@"38",pageString];
    dispatch_async(dispatch_get_global_queue(0, 0), ^{
        NSDictionary *result = [InternetRequest loadDataWithUrlString:urlString];
        dispatch_sync(dispatch_get_main_queue(), ^{
            NSNumber *status = (NSNumber *)[result objectForKey:@"status"];
            if ([status isEqual:[NSNumber numberWithInt:2]]) {
                [datas removeAllObjects];
                id infos = [result objectForKey:@"info"];
                if ([infos isKindOfClass:[NSArray class]]) {
                    [datas addObjectsFromArray:infos];
                }
                [tableview reloadData];
                [tableview headerEndRefreshing];
            }else{
                [SVProgressHUD showErrorWithStatus:@"没有数据"];
                [tableview headerEndRefreshing];
                page = 0;
            }
        });
    });
}

- (void)footerRereshing
{
    page++;
    NSString *pageString = [NSString stringWithFormat:@"%d",page];
    NSString *urlString = [NSString stringWithFormat:@"http://earea.stcyclub.com/wap.php/Prize/mylucky?mid=%@&page=%@",@"38",pageString];
    dispatch_async(dispatch_get_global_queue(0, 0), ^{
        NSDictionary *result = [InternetRequest loadDataWithUrlString:urlString];
        dispatch_sync(dispatch_get_main_queue(), ^{
            NSNumber *status = (NSNumber *)[result objectForKey:@"status"];
            if ([status isEqual:[NSNumber numberWithInt:2]]) {
                id infos = [result objectForKey:@"info"];
                if ([infos isKindOfClass:[NSArray class]]) {
                    [datas addObjectsFromArray:infos];
                    [tableview reloadData];
                }else{
                    [SVProgressHUD showErrorWithStatus:@"没有更多数据了"];
                }
                [tableview footerEndRefreshing];
            }else{
                [SVProgressHUD showErrorWithStatus:@"没有更多数据了"];
                [tableview footerEndRefreshing];
                page--;
            }
        });
    });
    
}


- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

-(void)updateViewConstraints{
    [super updateViewConstraints];
}

#pragma mark - Table view data source

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
    // Return the number of sections.
    return datas.count;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    // Return the number of rows in the section.
    return 1;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    NSUInteger row = indexPath.section;
    RewardCell *cell = [tableView dequeueReusableCellWithIdentifier:identifier forIndexPath:indexPath];
    NSDictionary *data = [datas objectAtIndex:row];
    // Configure the cell...
    cell.rewardValue.text = [data objectForKey:@"cash"];
    cell.time.text = [data objectForKey:@"regtime"];
    return cell;
}


-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{
    return 54;
}


@end