MJRefresh类------>下拉刷新,上拉加载
@MJ大神出品,很方便的实现下拉刷新,上拉加载数据,下载地址:http://code4app.com/ios/快速集成下拉上拉刷新/52326ce26803fabc46000000
@导入类
1.将MJRefresh文件夹整个导入所需的工程中。(支持ARC,MRC工程要注意设置)
2.文件夹中的MJRefresh.bundle—>[email protected] 图片可自行替换,这个会在刷新过程中显示。
3.可以在MJRefreshConst.h和MJRefreshConst.m文件中自定义显示的文字内容和文字颜色。
4.只要你的view能够滚动，就能集成这个控件，比如UIScrollView、UITableView、UICollectionView
5 导入头文件 #import "MJRefresh.h"
@实现
MJ大神提供了代理协议方法
下面给出代理协议方法实现的主要代码:
主要实现:上拉加载10条新闻,每次都是显示在最前面;下拉加载10条新闻,每次都是显示在已有新闻下面
@自动刷新：调用beginRefreshing可以自动进入下拉刷新状态
#import "NewsListViewController.h"
#import "HMTMyCustomNetRequest.h"
#import "NewsItem.h"
#import "MJRefresh.h"
@interface NewsListViewController ()
{
HMTMyCustomNetRequest * _request;
MJRefreshHeaderView * _header;
MJRefreshFooterView * _footer;
NSUInteger number;
}
@property (nonatomic,retain)NSMutableArray * newDataArray;
@property (nonatomic,retain)NSMutableArray * oldDataArray;
@property (nonatomic,copy)NSString * dataString;
@end
@implementation NewsListViewController
- (void)dealloc
{
[_header release];
[_footer release];
RELEASE_SAFELY(_dataString);
RELEASE_SAFELY(_newDataArray);
RELEASE_SAFELY(_oldDataArray);
//取消网络请求
[_request cancelNSURLConnection];
_request = nil;
[super dealloc];
}
- (id)initWithStyle:(UITableViewStyle)style
{
self = [super initWithStyle:style];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
number = 0;
#pragma mark 从顶部往下刷新------>下拉刷新
_header = [MJRefreshHeaderView header];
_header.scrollView = self.tableView;
_header.delegate = self;
#pragma mark 从底部往上刷新------>上拉刷新
_footer = [MJRefreshFooterView footer];
_footer.scrollView = self.tableView;
_footer.delegate = self;
self.newDataArray = [NSMutableArray array];
self.oldDataArray = [NSMutableArray array];
}
#pragma mark - 开始刷新
- (void)refreshViewBeginRefreshing:(MJRefreshBaseView *)refreshView{
self.dataString = [[NSString stringWithFormat:@"date=20131129&startRecord=%lu",number] stringByAppendingString:@"&len=10&udid=1234567890&terminalType=Iphone&cid=213"];
_request = [[HMTMyCustomNetRequest alloc] init];
NSData * postData = [_dataString dataUsingEncoding:NSUTF8StringEncoding];
[_request requestForPOSTWithUrl:@"http://ipad-bjwb.bjd.com.cn/DigitalPublication/publish/Handler/APINewsList.ashx" postData:postData];
[_request setFinishLoadBlock:^(NSData * data){
//解析数据
NSDictionary * dic = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:nil];
NSArray * originalArray = [dic objectForKey:@"news"];
//将originalArray中的字典,逐个封装为newsItem数据对象,存储在UITableView的数据源中
for (int i = 0; i<[originalArray count]; i++) {
//从解析得到的数组中,获取包含新闻信息的字典对象并把它封装为NewsItem类型的数据对象
NewsItem * item = [[NewsItem alloc] initWithDic:[originalArray objectAtIndex:i]];
//将封装好数据对象item添加到tableView的数据源中
[_newDataArray addObject:item];
[item release];
}
#pragma mark 下拉刷新,要的是加载新数据---见网易新闻刷新
if ([refreshView isMemberOfClass:[MJRefreshHeaderView class]]) {
for (int i = 0; i < [_newDataArray count]; i++) {
[self.oldDataArray insertObject:[_newDataArray objectAtIndex:i] atIndex:i];
}
[self.tableView reloadData];
// 结束刷新
[refreshView endRefreshing];
#pragma mark 上拉加载,要的是加载更多数据---见百度贴吧翻页
}else if([refreshView isMemberOfClass:[MJRefreshFooterView class]]){
for (int i = 0; i < [_newDataArray count]; i++) {
[self.oldDataArray addObject:[_newDataArray objectAtIndex:i]];
}
[self.tableView reloadData];
// 结束刷新
[refreshView endRefreshing];
}
}];
}
#pragma mark - 刷新结束时调用的方法
- (void)refreshViewEndRefreshing:(MJRefreshBaseView *)refreshView{
// 下拉刷新
if ([refreshView isMemberOfClass:[MJRefreshHeaderView class]]) {
self.newDataArray = [NSMutableArray array];
number += 10;
} else {
self.newDataArray = [NSMutableArray array];
number += 10;
}
}
#pragma mark - 监测状态
- (void)refreshView:(MJRefreshBaseView *)refreshView stateChange:(MJRefreshState)state{
switch (state) {
case MJRefreshStateNormal:
NSLog(@"%@----切换到：普通状态", refreshView.class);
break;
case MJRefreshStatePulling:
NSLog(@"%@----切换到：松开即可刷新的状态", refreshView.class);
break;
case MJRefreshStateRefreshing:
NSLog(@"%@----切换到：正在刷新状态", refreshView.class);
break;
default:
break;
}
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#pragma mark - Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [_oldDataArray count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
NewsItem * item = [_oldDataArray objectAtIndex:indexPath.row];
static NSString *CellIdentifier = @"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (!cell) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
cell.textLabel.text = [NSString stringWithFormat:@"%lu %@",indexPath.row+1,item.newsTitle];
return cell;
}
@end Block实现的主要代码:
#pragma mark 下拉刷新,要的是加载新数据---见网易新闻刷新
- (void)refreshViewOfBlock{
_header = [MJRefreshHeaderView header];
_header.scrollView = self.tableView;
[_header setBeginRefreshingBlock:^(MJRefreshBaseView * refreshView){
self.dataString = [[NSString stringWithFormat:@"date=20131129&startRecord=%lu",number] stringByAppendingString:@"&len=10&udid=1234567890&terminalType=Iphone&cid=213"];
_request = [[HMTMyCustomNetRequest alloc] init];
NSData * postData = [_dataString dataUsingEncoding:NSUTF8StringEncoding];
[_request requestForPOSTWithUrl:@"http://ipad-bjwb.bjd.com.cn/DigitalPublication/publish/Handler/APINewsList.ashx" postData:postData];
[_request setFinishLoadBlock:^(NSData * data){
//解析数据
NSDictionary * dic = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:nil];
NSArray * originalArray = [dic objectForKey:@"news"];
//将originalArray中的字典,逐个封装为newsItem数据对象,存储在UITableView的数据源中
for (int i = 0; i<[originalArray count]; i++) {
//从解析得到的数组中,获取包含新闻信息的字典对象并把它封装为NewsItem类型的数据对象
NewsItem * item = [[NewsItem alloc] initWithDic:[originalArray objectAtIndex:i]];
//将封装好数据对象item添加到tableView的数据源中
[_DataArray addObject:item];
[item release];
}
for (int i = 0; i < [_DataArray count]; i++) {
[self.oldDataArray insertObject:[_DataArray objectAtIndex:i] atIndex:i];
}
[self.tableView reloadData];
// 结束刷新
[refreshView endRefreshing];
}];
}];
[_header setEndStateChangeBlock:^(MJRefreshBaseView * refreshView){
NSLog(@"11111");
self.DataArray = [NSMutableArray array];
number += 10;
}];
_header.refreshStateChangeBlock = ^(MJRefreshBaseView *refreshView, MJRefreshState state) {
// 控件的刷新状态切换了就会调用这个block
switch (state) {
case MJRefreshStateNormal:
NSLog(@"%@----切换到：普通状态", refreshView.class);
break;
case MJRefreshStatePulling:
NSLog(@"%@----切换到：松开即可刷新的状态", refreshView.class);
break;
case MJRefreshStateRefreshing:
NSLog(@"%@----切换到：正在刷新状态", refreshView.class);
break;
default:
break;
}
};
}