自定义刷新tableView

//

//  LSTWholeTableController.m

//  BUDEJIE

//

//  Created by admin on 16/8/17.

//  Copyright © 2016年 ibokan. All rights reserved.

//

#import "LSTWholeTableController.h"

#import "AFNetworking.h"

#import "LSTWholeModal.h"

#import "MJExtension.h"

#import "SVProgressHUD.h"

@interface LSTWholeTableController ()

@property(nonatomic,weak)UIView * footerView;

@property(nonatomic,weak)UIView * headerView;

@property(nonatomic,weak)UILabel * footerLabel;

@property(nonatomic,weak)UILabel * headerLabel;

/**加载下一页数据**/

@property (nonatomic, copy) NSString *maxtime;

/**底部是否刷新**/

@property(nonatomic,assign,getter=isHeaderRefreshing)BOOL headerRefreshing;

/**Bool判断是否刷新**/

@property(nonatomic,assign,getter=isRefreshing)BOOL footerRefreshing;

/**模型数组**/

@property(nonatomic,strong)NSMutableArray * wholeData_array;

/**请求数据**/

@property(nonatomic,strong)AFHTTPSessionManager * manager;

@end

@implementation LSTWholeTableController

/**加载View**/

- (void)viewDidLoad {

[super viewDidLoad];

self.tableView.backgroundColor=[UIColor greenColor];

/**监听通知**/

[[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(tabBarButtonClick) name:TabBarButtonRepeatClickNotification object:nil];

[self setupRefresh];

[self loadData];

}

-(void)setupRefresh{

UIView * footerView=[[UIView alloc]initWithFrame:CGRectMake(0, 0, SCREEN_WIDTH, 35)];

UILabel * footerLabel=[[UILabel alloc]initWithFrame:footerView.bounds];

footerLabel.text=@"上拉加载更多";

footerLabel.textAlignment=NSTextAlignmentCenter;

footerLabel.backgroundColor=[UIColor orangeColor];

[footerView addSubview:footerLabel];

self.footerView=footerView;

self.footerLabel=footerLabel;

self.tableView.tableFooterView=footerView;

UILabel * label=[[UILabel alloc]initWithFrame:CGRectMake(0, 0, 0, 30)];

label.backgroundColor=[UIColor blackColor];

label.textColor=[UIColor whiteColor];

label.text=@"广告";

label.textAlignment=NSTextAlignmentCenter;

self.tableView.tableHeaderView=label;

/**头部**/

UIView * header=[[UIView alloc]init];

header.backgroundColor=[UIColor brownColor];

header.frame=CGRectMake(0, -50, SCREEN_WIDTH, 50);

self.headerView=header;

[self.tableView addSubview:header];

UILabel * headerLabel=[[UILabel alloc]init];

headerLabel.frame=header.bounds;

headerLabel.text=@"下拉可以刷新";

headerLabel.textColor=[UIColor whiteColor];

headerLabel.textAlignment=NSTextAlignmentCenter;

self.headerLabel=headerLabel;

[header addSubview:headerLabel];

// 让header自动进入刷新

[self headerBeginRefreshing];

}

- (void)headerBeginRefreshing

{

// 如果正在下拉刷新，直接返回

if (self.isHeaderRefreshing) return;

// 进入下拉刷新状态

self.headerLabel.text = @"正在刷新数据...";

self.headerLabel.backgroundColor = [UIColor blueColor];

self.headerRefreshing = YES;

// 增加内边距

[UIView animateWithDuration:0.25 animations:^{

UIEdgeInsets inset = self.tableView.contentInset;

inset.top += self.headerView.height;

self.tableView.contentInset = inset;

// 修改偏移量

self.tableView.contentOffset = CGPointMake(self.tableView.contentOffset.x,  - inset.top);

}];

// 发送请求给服务器，下拉刷新数据

[self loadData];

}

#pragma mark - 代理方法

/**

*  用户松开scrollView时调用

*/

- (void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate

{

CGFloat offsetY = - (self.tableView.contentInset.top + self.headerView.height);

if (self.tableView.contentOffset.y <= offsetY) { // header已经完全出现

[self headerBeginRefreshing];

}

}

-(AFHTTPSessionManager *)manager{

if (!_manager) {

_manager=[AFHTTPSessionManager manager];

}

return _manager;

}

- (void)scrollViewDidScroll:(UIScrollView *)scrollView

{

// 处理header

[self dealHeader];

// 处理footer

[self dealFooter];

}

/**

*  处理footer

*/

- (void)dealFooter

{

// 还没有任何内容的时候，不需要判断

if (self.tableView.contentSize.height == 0) return;

// 当scrollView的偏移量y值 >= offsetY时，代表footer已经完全出现

CGFloat ofsetY = self.tableView.contentSize.height + self.tableView.contentInset.bottom - self.tableView.height;

if (self.tableView.contentOffset.y >= ofsetY

&& self.tableView.contentOffset.y > - (self.tableView.contentInset.top)) { // footer完全出现，并且是往上拖拽

[self footerBeginRefreshing];

}

}

- (void)dealHeader

{

// 如果正在下拉刷新，直接返回

if (self.isHeaderRefreshing) return;

// 当scrollView的偏移量y值 <= offsetY时，代表header已经完全出现

CGFloat offsetY = - (self.tableView.contentInset.top + self.headerView.height);

if (self.tableView.contentOffset.y <= offsetY) { // header已经完全出现

self.headerLabel.text = @"松开立即刷新";

self.headerLabel.backgroundColor = [UIColor grayColor];

} else {

self.headerLabel.text = @"下拉可以刷新";

self.headerLabel.backgroundColor = [UIColor redColor];

}

}

- (void)headerEndRefreshing

{

self.headerRefreshing = NO;

// 减小内边距

[UIView animateWithDuration:0.25 animations:^{

UIEdgeInsets inset = self.tableView.contentInset;

inset.top -= self.headerView.height;

self.tableView.contentInset = inset;

}];

}

-(void)tabBarButtonClick{

if (self.view.window==nil) return;

if (self.tableView.scrollsToTop==NO) return;

}

-(void)dealloc{

[[NSNotificationCenter defaultCenter]removeObserver:self name:TabBarButtonRepeatClickNotification object:nil];

}

#pragma mark 加载数据

-(void)loadData{

NSMutableDictionary * parameters=[NSMutableDictionary dictionary];

parameters[@"a"]=@"list";

parameters[@"c"]=@"data";

parameters[@"type"]=@"1";

[self.manager GET:BaseURL parameters:parameters progress:nil success:^(NSURLSessionDataTask * _Nonnull task, NSDictionary *  _Nullable responseObject) {

self.wholeData_array=[LSTWholeModal mj_objectArrayWithKeyValuesArray:responseObject[@"list"]];

[self.tableView reloadData];

} failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {

[SVProgressHUD showErrorWithStatus:@"网络异常,加载失败"];

}];

}

/**

*  发送请求给服务器，上拉加载更多数据

*/

- (void)loadMoreTopics

{

// 1.取消之前的请求

[self.manager.tasks makeObjectsPerformSelector:@selector(cancel)];

// 2.拼接参数

NSMutableDictionary *parameters = [NSMutableDictionary dictionary];

parameters[@"a"] = @"list";

parameters[@"c"] = @"data";

parameters[@"type"] = @"31";

parameters[@"maxtime"] = self.maxtime;

// 3.发送请求

[self.manager GET:BaseURL parameters:parameters progress:nil success:^(NSURLSessionDataTask * _Nonnull task, id _Nullable responseObject) {

// 存储maxtime

self.maxtime = responseObject[@"info"][@"maxtime"];

// 字典数组 -> 模型数据

NSArray *moreTopics = [LSTWholeModal mj_objectArrayWithKeyValuesArray:responseObject[@"list"]];

// 累加到旧数组的后面

[self.wholeData_array addObjectsFromArray:moreTopics];

// 刷新表格

[self.tableView reloadData];

// 结束刷新

[self footerEndRefreshing];

} failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {

if (error.code != NSURLErrorCancelled) { // 并非是取消任务导致的error，其他网络问题导致的error

[SVProgressHUD showErrorWithStatus:@"网络繁忙，请稍后再试！"];

}

// 结束刷新

[self footerEndRefreshing];

}];

}

- (void)footerEndRefreshing

{

self.footerRefreshing = NO;

self.footerLabel.text = @"上拉可以加载更多";

self.footerLabel.backgroundColor = [UIColor redColor];

}

#pragma mark - footer

- (void)footerBeginRefreshing

{

// 如果正在上拉刷新，直接返回

if (self.footerRefreshing) return;

// 进入刷新状态

self.footerRefreshing = YES;

self.footerLabel.text = @"正在加载更多数据...";

self.footerLabel.backgroundColor = [UIColor blueColor];

// 发送请求给服务器，上拉加载更多数据

[self loadMoreTopics];

}

#pragma mark - Table view data source

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {

return self.wholeData_array.count;

}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {

static NSString * const ID=@"cell";

UITableViewCell * cell=[tableView dequeueReusableCellWithIdentifier:ID];

if (!cell) {

cell=[[UITableViewCell alloc]initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:ID];

}

LSTWholeModal * wholeDateModal=self.wholeData_array[indexPath.row];

cell.textLabel.text=wholeDateModal.name;

cell.detailTextLabel.text=wholeDateModal.text;

return cell;

}

@end