IOS UI 第十篇: UITABLEVIEW

uitableView review yesterday’s knowledge :

 

 

 

 

folding group :

 

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teacher code : 

 

-(UIView*)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section{
    QFGroupHead *headView=[[NSBundle mainBundle]loadNibNamed:@"QFGroupHead" owner:nil options:nil][0];
    [headView addTarget:self action:@selector(onHeadClicked:) forControlEvents:UIControlEventTouchUpInside];
    headView.tag=section;
    QFQQGroupModel *model=dataArray[section];
    [headView refreshUIWithModel:model];
    return headView;
}

 

-(void)onHeadClicked:(UIView *)headView{
    NSLog(@"onHeadClicked:%d",headView.tag);
    QFQQGroupModel *model=dataArray[headView.tag];
    model.isHide=!model.isHide;
    [self.myTableView reloadSections:[NSIndexSet indexSetWithIndex:headView.tag] withRowAnimation:UITableViewRowAnimationNone];
}

 

 

-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
    //在数据源中取出数据模型
    QFQQGroupModel *model=dataArray[section];
    if (model.isHide) {
        return 0;
    }
    //返回数据模型中相应的数据
    return model.groupMember.count;
}

 

teacher ’s dataModel :

 

@property (nonatomic,copy) NSString *groupName;
@property int friendNum;
@property (nonatomic,strong) NSMutableArray *groupMember;
@property BOOL isHide;

 

 

 

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My code :

 

 

- (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section{
    GroupHead *groupHead = [[NSBundle mainBundle] loadNibNamed:@"GroupHead" owner:nil options:nil][0];
    
    [groupHead addTarget:self action:@selector(onHeadClicked:) forControlEvents:UIControlEventTouchUpInside];
    groupHead.tag = section;
    [groupHead refreshUIWithModel:self.model modelSection:section];
    return groupHead;
}

 

-(void)onHeadClicked:(UIView *)headView{
    
    NSNumber *number = self.model.isHiddenArray[headView.tag];
    if(number.intValue == 1)
        [self.model isHiddenSection:headView.tag Boolis:NO];
    else
        [self.model isHiddenSection:headView.tag Boolis:YES];
    
    [self.myTableView reloadSections:[NSIndexSet indexSetWithIndex:headView.tag] withRowAnimation:UITableViewRowAnimationNone];
    
}

 

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    NSNumber *number = self.model.isHiddenArray[section];
    if(number.intValue){
        return 0;
    }
    return [self.model.groupMemberNum[section] intValue];
}

 

my DataModel :

 

@property (nonatomic, strong) NSMutableArray *groupName;
@property (nonatomic, strong) NSMutableArray *dataArray;
@property (nonatomic, strong) NSMutableArray *groupMemberNum;
@property (nonatomic, strong) NSMutableArray *isHiddenArray;
@property int groupNum;
-(void)begin;
-(void)isHiddenSection:(NSInteger)section Boolis:(BOOL)isbool;
@end

 

 

DataModel implement :

 

-(void)begin{
    _dataArray = [NSMutableArray array];
    _groupName = [NSMutableArray array];
    _groupMemberNum = [NSMutableArray array];
    _isHiddenArray = [NSMutableArray array];
    _groupNum = 10;
    for (int i=0; i<10; ++i) {
        NSMutableArray *groupArray = [NSMutableArray array];
        NSString *groupstr = [NSString stringWithFormat:@"Group %d", i];
        [_groupName addObject:groupstr];
        int num = arc4random()%10+1;
        NSNumber *nsNum = [[NSNumber alloc] initWithBool:NO];
        [_isHiddenArray addObject:nsNum];
        [_groupMemberNum addObject:[NSString stringWithFormat:@"%d", num]];
        for (int j=0; j<num; ++j) {
            NSString *str = [NSString stringWithFormat:@"cell %d", j];
            [groupArray addObject:str];
        }
        [_dataArray addObject:groupArray];
    }
}

-(void)isHiddenSection:(NSInteger)section Boolis:(BOOL)isbool{
    NSNumber *num = [[NSNumber alloc] initWithBool:isbool];
    [_isHiddenArray removeObjectAtIndex:section];
    [_isHiddenArray insertObject:num atIndex:section];
}

 

 

GroupHead :

 

-(void)refreshUIWithModel:(Datamodel*)model modelSection:(NSInteger)section{
    groupName.text = model.groupName[section];
    totalMember.text = [NSString stringWithFormat:@"TotalMember:%@", model.groupMemberNum[section]];
    NSNumber *number = model.isHiddenArray[section];
    if(number.intValue == 0)
        hiddenStatus.text = @">";
    else hiddenStatus.text = @"v";
}

 

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Search Bar :

 

     完成搜索功能的步骤
     
     1、先实例化一个全局数组，用于储存搜索结果。
     2、实例化一个UISearchBar，并设置为tableview的tableheadview。
     3、用上面实例化的seachbar初始化一个搜索结果显示视图（UISearchDisplayController）
     4、设置uiseachDisplayController的三个代理
     //searchDC内部有一个talbview，这里设置代理就等于给它内部的tableview设置代理
     searchDC.searchResultsDataSource=self;
     searchDC.searchResultsDelegate=self;
     //searchDC自己的代理
     searchDC.delegate=self;
     5、导入UISearchDisplayDelegate协议
     6、实现UISearchDisplayDelegate的一个重要的代理方法
     - (BOOL)searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchString:(NSString *)searchString
     每当搜索栏的文字发生变化时，都会调用这个代理方法
     在这个方法里面我们遍历整个数据源，找到包含搜索文字的那些，然后放进搜索结果的数组里面（注意，搜索之前要记得把搜索结果的数组先清空）
     7、由于myTableView和搜索结果的tableview共用我们这个类的那些代理方法，所以要在所有的代理方法里面加入判断，以返回正确的数据。
     例如：
     //有多少组
     -(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView{
     //判断是否为searchDisplayController的结果tableview
     if (tableView==searchDC.searchResultsTableView) {
     return 1;
     }
     return totalArray.count;
     }
     、、、、、
     
     8、至此，搜索功能完成。
     
     */

 

 

 

 

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my Search Bar Code ::

 

//
//  MainViewController.m
//  UITableViewCellXib_01
//
//  Created by YuLei on 4/11/14.
//  Copyright (c) 2014 ___DuanYuLei___. All rights reserved.
//

#import "MainViewController.h"
#import "GroupHead.h"

@interface MainViewController () <UITableViewDataSource, UITableViewDelegate, UISearchDisplayDelegate]]>
@property (weak, nonatomic) IBOutlet UITableView *myTableView;
@end

@implementation MainViewController{
    UISearchDisplayController *searchDisplayController;
}

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

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view from its nib.
    
    _model = [[Datamodel alloc] init];
    [_model begin];
    self.myTableView.delegate = self;
    self.myTableView.dataSource = self;
    
    //search function
    UISearchBar *searchBar = [[UISearchBar alloc] initWithFrame:CGRectMake(0, 0, 320, 30)];
    self.myTableView.tableHeaderView = searchBar;
    
    searchDisplayController = [[UISearchDisplayController alloc] initWithSearchBar:searchBar contentsController:self];
    searchDisplayController.searchResultsDataSource = self;
    searchDisplayController.searchResultsDelegate = self;
    searchDisplayController.delegate = self;

//create a colorful foot line or clear the line.
    UIView *footView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 1)];
    footView.backgroundColor = [UIColor clearColor];
    self.myTableView.tableFooterView = footView;
}

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

-(CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section{
    if(tableView == searchDisplayController.searchResultsTableView)
        return 0;
    return 44;
}

-(void)onHeadClicked:(UIView *)headView{
    
    NSNumber *number = self.model.isHiddenArray[headView.tag];
    
    if(number.intValue == 1)
        [self.model isHiddenSection:headView.tag Boolis:NO];
    else
        [self.model isHiddenSection:headView.tag Boolis:YES];
    
    [self.myTableView reloadSections:[NSIndexSet indexSetWithIndex:headView.tag] withRowAnimation:UITableViewRowAnimationNone];
    
}

- (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section{
    GroupHead *groupHead = [[NSBundle mainBundle] loadNibNamed:@"GroupHead" owner:nil options:nil][0];
    if (tableView == searchDisplayController.searchResultsTableView) {
        return nil;
    }
    
    [groupHead addTarget:self action:@selector(onHeadClicked:) forControlEvents:UIControlEventTouchUpInside];
    groupHead.tag = section;
    [groupHead refreshUIWithModel:self.model modelSection:section];
    return groupHead;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    
    if (tableView == searchDisplayController.searchResultsTableView) {
        return self.model.searchDataArray.count;
    }
    
    NSNumber *number = self.model.isHiddenArray[section];
    if(number.intValue){
        return 0;
    }
    return [self.model.groupMemberNum[section] intValue];
}

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView{
    if(tableView == searchDisplayController.searchResultsTableView)
        return 1;
    return self.model.groupNum;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
    static NSString *reuseID = @"myCell";
    UITableViewCell *cell = [_myTableView dequeueReusableCellWithIdentifier:reuseID];
    if (cell == nil) {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:nil];
    }
    
    if(tableView == searchDisplayController.searchResultsTableView){
        cell.textLabel.text = self.model.searchDataArray[indexPath.row];
    }else{
        cell.textLabel.text = self.model.dataArray[indexPath.section][indexPath.row];
    }
    return cell;
}

- (BOOL)searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchString:(NSString *)searchString{
    [self.model.searchDataArray removeAllObjects];
    for (int i=0; i<self.model.groupNum; ++i) {
        NSArray *friends = self.model.dataArray[i];
        for (int j=0; j<friends.count; ++j) {
            NSString *str = friends[j];
            NSRange range = [str rangeOfString:searchString];
            if (range.length > 0) {
                [self.model.searchDataArray addObject:str];
            }
        }
    }
    return YES;
}

@end

 

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Add a groupHeader cache

 

 

define it in :

 

@implementation MainViewController{
    UISearchDisplayController *searchDisplayController;
    NSMutableDictionary *cacheHeadViewDictionary;
}

 

- (void)viewDidLoad{
    [super viewDidLoad];
    cacheHeadViewDictionary=[NSMutableDictionary dictionary];
 

 

use it as function  <tableView:viewForHeaderInSection>

 

- (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section{
    if (tableView == searchDisplayController.searchResultsTableView) {
        return nil;
    }
    
    GroupHead *groupHead = cacheHeadViewDictionary[[NSString stringWithFormat:@"%d", section]];
    if (groupHead == nil) {
        groupHead = [[NSBundle mainBundle] loadNibNamed:@"GroupHead" owner:nil options:nil][0];
        groupHead.backgroundColor=[UIColor colorWithRed:(CGFloat)random()/RAND_MAX green:(CGFloat)random()/RAND_MAX blue:(CGFloat)random()/RAND_MAX alpha:1];
        [groupHead addTarget:self action:@selector(onHeadClicked:) forControlEvents:UIControlEventTouchUpInside];
        groupHead.tag = section;
        [cacheHeadViewDictionary setObject:groupHead forKey:[NSString stringWithFormat:@"%d",section]];
    }
    [groupHead refreshUIWithModel:self.model modelSection:section];
    return groupHead;
}

 

 

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