iOS开发之UITableView与UISearchController实现搜索及上拉加载，下拉刷新实例代码

#import "ViewController.h"
#import "TuanGouModel.h"
#import "TuanGouTableViewCell.h"
#define kDeviceWidth [UIScreen mainScreen].bounds.size.width
#define kDeviceHeight [UIScreen mainScreen].bounds.size.height
@interface ViewController ()<UITableViewDelegate,UITableViewDataSource,UISearchResultsUpdating>
{
UISearchController * _sscller;
}
@property(nonatomic,strong)NSMutableArray* secArrM;
@property(nonatomic,strong) NSMutableArray* tuanGouArrM;
@property(nonatomic,strong)UITableView* myTable;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
[self createNa];
self.myTable.backgroundColor = [UIColor lightGrayColor];
[self createsecB];
[self setupRefresh];
self.title = @"美食家";
}
#pragma mark - 导航
-(void)createNa{
UIBarButtonItem *rightItem = [[UIBarButtonItem alloc]initWithTitle:@"Edit" style:UIBarButtonItemStylePlain target:self action:@selector(tableEdit:)];
self.navigationItem.rightBarButtonItem = rightItem;
self.title = @"美食家";
}
// 点击导航右侧编辑按钮时，让表格可编辑
-(void)tableEdit:(UIBarButtonItem *) btnItem{
// if (self.myTable.editing == NO ) { // 没有处于编辑状态，导航按钮文字为“Edit”
// // 点击“编辑”文字，让表格处于编辑状态，并把按钮的文字修改为“Done"
// self.myTable.editing = YES;
// 
// }else{
// // 编辑状态下，点击”Done"按钮，取消表格的编辑状态，修改导航按钮文字为"Edit"
// self.myTable.editing = NO;
// btnItem.title = @"Edit" ;
// self.navigationItem.rightBarButtonItems = @[btnItem];
// }
}
-(void)createsecB{
_sscller = [[UISearchController alloc]initWithSearchResultsController:nil];
_sscller.searchResultsUpdater = self;
self.myTable.tableHeaderView = _sscller.searchBar;
}
-(NSMutableArray *)secArrM{
if (_secArrM == nil) {
return _secArrM = [NSMutableArray array];
}else{
return _secArrM;
}
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
}
#pragma mark - 表格懒加载
-(UITableView *)myTable{
if (_myTable == nil) {
_myTable = [[UITableView alloc]initWithFrame:CGRectMake(, , kDeviceWidth, kDeviceHeight) style:UITableViewStylePlain];
[self.view addSubview:_myTable];
_myTable.delegate = self;
_myTable.dataSource = self;
_myTable .separatorStyle = UITableViewCellSeparatorStyleSingleLineEtched;
}
return _myTable;
}
#pragma mark - 团购数据懒加载
-(NSMutableArray *)tuanGouArrM{
if (_tuanGouArrM == nil) {
_tuanGouArrM = [NSMutableArray array];
NSString* plistPath = [[NSBundle mainBundle]pathForResource:@"tgs.plist" ofType:nil];
NSArray* tuanArr = [NSArray arrayWithContentsOfFile:plistPath];
for (NSDictionary* dict in tuanArr) {
TuanGouModel* model =[[TuanGouModel alloc]initWithDict:dict];
[_tuanGouArrM addObject:model];
}
}
return _tuanGouArrM;
}
#pragma mark - 数据源协议
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
if ( _sscller.active ) { //搜索结果表格
return self.secArrM.count;
}
else{
return self.tuanGouArrM.count;
}
}
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
//注册
[tableView registerClass:[TuanGouTableViewCell class] forCellReuseIdentifier:@"tuanCell"];
//重置
TuanGouTableViewCell* cell = [tableView dequeueReusableCellWithIdentifier:@"tuanCell"forIndexPath:indexPath];
cell.backgroundColor = [UIColor yellowColor];
// 选中风格
cell.selectionStyle = UITableViewCellSelectionStyleNone;
if( !_sscller.active ){
cell.tuanGouModel = self.tuanGouArrM[indexPath.row];
}else{ //搜索结果
cell.tuanGouModel = self.secArrM[indexPath.row];
}
return cell;
}
#pragma mark - TableV协议
-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{
return ;
}
-(void)updateSearchResultsForSearchController:(UISearchController *)searchController{
[self.secArrM removeAllObjects];
for (int j = ; j < _tuanGouArrM.count; j++) {
TuanGouModel* model =[[TuanGouModel alloc]init];
model = _tuanGouArrM[j];
if ([model.title isEqualToString: _sscller.searchBar.text]) {
[self.secArrM addObject: model];
}
}
[self.myTable reloadData];
}
//允许Menu菜单
-(BOOL)tableView:(UITableView *)tableView shouldShowMenuForRowAtIndexPath:(NSIndexPath *)indexPath
{
return YES;
}
//每个cell都可以点击出现Menu菜单
-(BOOL)tableView:(UITableView *)tableView canPerformAction:(SEL)action forRowAtIndexPath:(NSIndexPath *)indexPath withSender:(id)sender
{
return YES;
}
-(void)tableView:(UITableView *)tableView performAction:(SEL)action forRowAtIndexPath:(NSIndexPath *)indexPath withSender:(id)sender{
NSLog(@"长按");
if (action ==@selector(copy:)) {
NSLog(@"copy");
}
if (action ==@selector(cut:)) {
NSLog(@"cut");
}
if (action ==@selector(paste:)) {
NSLog(@"paste");
}
if (action ==@selector(selectAll:)) {
NSLog(@"selectAll");
}
}
//上拉加载
-(void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath{
if (indexPath.row == self.tuanGouArrM.count - ) {
NSLog(@"最后一行");
TuanGouModel* model =[[TuanGouModel alloc]init];
model = _tuanGouArrM[arcrandom()%];
[_tuanGouArrM addObject:model];
[self.myTable reloadData];
}
}
//下拉刷新
-(void)setupRefresh
{
//.添加刷新控件
UIRefreshControl *control=[[UIRefreshControl alloc]init];
[control addTarget:self action:@selector(refreshStateChange:) forControlEvents:UIControlEventValueChanged];
[self.myTable addSubview:control];
//.马上进入刷新状态，并不会触发UIControlEventValueChanged事件
[control beginRefreshing];
// .加载数据
[self refreshStateChange:control];
}
/**
* UIRefreshControl进入刷新状态：加载最新的数据
*/
-(void)refreshStateChange:(UIRefreshControl *)control
{
TuanGouModel* model =[[TuanGouModel alloc]init];
model = _tuanGouArrM[arcrandom()%];
[_tuanGouArrM insertObject:model atIndex:];
[self.myTable reloadData];
NSLog(@"第一行");
[control endRefreshing];
}
//指示是否允许高亮显示选中的行
- (BOOL)tableView:(UITableView *)tableView shouldHighlightRowAtIndexPath:(NSIndexPath *)indexPath{
return YES;
}
//选中某行时执行
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
NSLog(@"selected: %ld, row:%ld", indexPath.section, indexPath.row);
}
//取消选中时执行，这个方法常在表格允许多选时调用执行
- (void)tableView:(UITableView *)tableView didDeselectRowAtIndexPath:(NSIndexPath *)indexPath{
NSLog(@"Deselected: %ld, row:%ld", indexPath.section, indexPath.row);
}