IOS开发（11）IOS MJRefresh 控件demo

//
//  ViewController.m
//  02-上拉加载下拉刷新
//
//  Created by witsystem on 2018/3/12.
//  Copyright © 2018年 witsystem. All rights reserved.
//

#import "ViewController.h"
//导入第三方库
#import "MJRefresh.h"

#define SCREEN_W [UIScreen mainScreen].bounds.size.width
#define SCREEN_H [UIScreen mainScreen].bounds.size.height

@interface ViewController () <UITableViewDelegate , UITableViewDataSource>

@property (nonatomic, strong) UITableView *tableView;
@property (nonatomic, strong) NSMutableArray *data;

@end

@implementation ViewController

#pragma mark -- create tableView

- (void) createTableView {
_tableView = [[UITableView alloc] initWithFrame: CGRectMake(0, 20, SCREEN_W, SCREEN_H - 20)];
_tableView.backgroundColor = [UIColor cyanColor];
_tableView.delegate = self;
_tableView.dataSource = self;

//统一设置高度
_tableView.rowHeight = 80;

[self.view addSubview: _tableView];
}

#pragma mark -- dataSource

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

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

static NSString *cellId = @"cellId";

UITableViewCell *cell = [_tableView dequeueReusableCellWithIdentifier:cellId];
if(!cell){
cell = [[UITableViewCell alloc] initWithStyle: UITableViewCellStyleDefault reuseIdentifier: cellId];
}

cell.textLabel.text = _data[indexPath.row];

return cell;
}

#pragma mark -- 上拉加载下拉刷新方法

- (void) addMJRefresh {
//添加上拉与下拉的效果
//下拉 触发加载刷新界面
MJRefreshNormalHeader *header = [MJRefreshNormalHeader headerWithRefreshingBlock:^{
//下拉结束回调，一般写请求网络数据
[self reloadData];
//停止刷新
[_tableView.mj_header endRefreshing];
}];

//上拉 触发加载更多
MJRefreshBackNormalFooter *footer = [MJRefreshBackNormalFooter footerWithRefreshingBlock:^{
//上拉结束回调，一般写请求网络数据
[self loadMoreData];
//停止刷新
[_tableView.mj_footer endRefreshing];
}];

//设置文字
[header setTitle: @"1111" forState: MJRefreshStatePulling];
[header setTitle: @"2222" forState: MJRefreshStateRefreshing];
_tableView.mj_header = header;

[footer setTitle: @"3333" forState: MJRefreshStatePulling];
_tableView.mj_footer = footer;

}

#pragma mark -- reloadData

-(void) reloadData {
if(!_data){
_data = [NSMutableArray array];
}else{
[_data removeAllObjects];
}

//模拟网络加载时间
sleep(1);

for (int i=0; i<10; i++) {
NSString *title = [NSString stringWithFormat:@"title-00%d", i+1];
[_data addObject: title];
}

[_tableView reloadData];
}

#pragma mark -- loadMoreData
-(void) loadMoreData {
int count = (int)_data.count;
sleep(1);
for (int i=0; i<10; i++) {
NSString *title = [NSString stringWithFormat:@"title-00%d", i+count];
[_data addObject: title];
}
[self.tableView reloadData];
}

#pragma mark -- 控制器方法
- (void)viewDidLoad {
[super viewDidLoad];

[self createTableView];
[self addMJRefresh];
}

#pragma mark 视图即将加入窗口时调用，解决第一次加载数据的问题
- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear: animated];
[self reloadData];
}

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

@end