uitableview 和UISearchBar 下拉提示结合使用

自定cell的代码

餐厅的实体和餐厅对应控件的frame

#import <Foundation/Foundation.h>
@class RestaurantFrame;
@interface Restaurant : NSObject
@property(nonatomic,copy)NSString *restaurantIcon;
@property(nonatomic,copy)NSString *restaurantTitle;
@property(nonatomic,copy)NSString *restaurantSubTitle;
@property(nonatomic,retain) RestaurantFrame *frame;//初始化内容的时候也要得到餐厅中控件的位置和内容
+(id)RestaturantImage:(NSString *)image Title:(NSString *)title  subTitle:(NSString *)subtitle;
@end

@implementation Restaurant

+(id)RestaturantImage:(NSString *)image Title:(NSString *)title subTitle:(NSString *)subtitle{
    Restaurant *res=[[Restaurant alloc] init];
    res.restaurantIcon=image;
    res.restaurantTitle=title;
    res.restaurantSubTitle=subtitle;
    res.frame=[[RestaurantFrame  alloc] initWithRestaurant:res];
    return  [res autorelease];
    
}


- (void)dealloc
{
    [_restaurantIcon release];
    [_restaurantTitle release];
    [_restaurantSubTitle release];
    [_frame release];
    [super dealloc];
}
@end

餐厅对应的cell的位置

#import "Restaurant.h"
#define KPadding 10
#define kImageWidth 100
#define KImageHeight 100
#define KTitleFont 15
#define kSubFont 12
@implementation RestaurantFrame
-(id)initWithRestaurant:(Restaurant *)res{
    if(self=[super init]){
        CGFloat width=[UIScreen mainScreen].bounds.size.width ;
        //通过内容算大小
        CGFloat imagex=KPadding;
        CGFloat imgagey=KPadding;
        CGFloat imgagew=kImageWidth;
        CGFloat imgageh=KImageHeight;
        _restaurantImageFram=CGRectMake(imagex,imgagey,imgagew,imgageh);
        
        CGFloat labelx=imagex+KPadding+imgagew;
        CGFloat labely=imgagey;
        CGFloat labelw=width-imgagew-imagex-KPadding*2;
        CGFloat labelh=[UIFont systemFontOfSize:KTitleFont].lineHeight;
        _restaurantLabelFram=CGRectMake(labelx,labely,labelw,labelh);
        
        CGFloat sublabelx=labelx;
        CGFloat sublabely=imgagey+labelh+KPadding;
        CGFloat sublabelw=labelw;
        CGFloat sublabelh= [res.restaurantSubTitle sizeWithFont:[UIFont systemFontOfSize:kSubFont] constrainedToSize:CGSizeMake(sublabelw, 10000) lineBreakMode:NSLineBreakByCharWrapping].height;
        
        _resSubTitle=CGRectMake(sublabelx, sublabely, sublabelw, sublabelh);
        
        
        _cellHeight=imgageh;
    }
    return self;
    
    
}
@end

cell内部初始化的控件的位置

#import <UIKit/UIKit.h>
@class Restaurant;
@interface UIMyCell : UITableViewCell

//把餐厅信息设置到cell
@property(nonatomic,retain)Restaurant *rest;

@property(nonatomic,readonly)UIImageView *Resimageview;
//@property(nonatomic,readonly)UILabel *titleLabel;
@end



#import "UIMyCell.h"
#import "Restaurant.h"
#import "RestaurantFrame.h"

@interface UIMyCell()
{
    UILabel *_subTitle;
    UILabel *_TitleLabel;
}
@end
@implementation UIMyCell

- (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier
{
    self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
    if (self) {
        // Initialization code
        UIImageView *imageview=[[UIImageView alloc] init];
        [self.contentView addSubview:imageview];
        _Resimageview=imageview;
        [imageview release];
        
        UILabel *TitleLabel=[[UILabel alloc] init];
        TitleLabel.backgroundColor=[UIColor clearColor];
        TitleLabel.font=[UIFont systemFontOfSize:15];
        [self.contentView addSubview:TitleLabel];
        _TitleLabel=TitleLabel;
        [TitleLabel release];
        
        UILabel *subTitle=[[UILabel alloc] init];
        subTitle.backgroundColor=[UIColor clearColor];
        subTitle.font=[UIFont systemFontOfSize:12];
        subTitle.numberOfLines=0;
        
        [self.contentView addSubview:subTitle];
        _subTitle=subTitle;
        [subTitle release];
    }
    return self;
}

-(void)setRest:(Restaurant *)rest{
    if(_rest!=rest){
        _rest=[rest retain];
        
        _Resimageview.image=[UIImage imageNamed:rest.restaurantIcon];//设置默认图片
        _TitleLabel.text=rest.restaurantTitle;
        _subTitle.text=rest.restaurantSubTitle;
    }
}

- (void)setSelected:(BOOL)selected animated:(BOOL)animated
{
    [super setSelected:selected animated:animated];
    
    // Configure the view for the selected state
}


- (void)dealloc
{
    self.rest=nil;
    [super dealloc];
}



-(void)layoutSubviews{
    [super layoutSubviews];
    _Resimageview.frame=self.rest.frame.restaurantImageFram;
    _TitleLabel.frame=self.rest.frame.restaurantLabelFram;
    _subTitle.frame=self.rest.frame.resSubTitle;
}

@end

第一步在主视图控制器中加载一个UISearchBar 和UITableview

 1 -(void)Inittableview{
 2 
 3    
 4     
   //初始化主view中tableview 加载到self.view上
 5     CGFloat viewx=0;
 6     CGFloat viewy=0;
 7     CGFloat vieww=self.view.bounds.size.width;
 8     CGFloat viewH=self.view.bounds.size.height-44;
 9     UITableView *view=[[UITableView alloc] initWithFrame:CGRectMake(viewx,viewy,vieww,viewH)];
10     view.delegate=self;
11     view.dataSource=self;
12     _tableview=view;
13     UIView *bgview=[[[UIView alloc] init] autorelease];
14     bgview.backgroundColor=[UIColor colorWithRed:0.8 green:0.8 blue:0.8 alpha:0.8];
15     view.backgroundView=bgview;
16     
17     [self.view addSubview:view];
18     [view release];
19     
20     //初始化搜索框，在self.view上
21       UISearchBar *searchbar=[[[UISearchBar alloc] initWithFrame:CGRectMake(0, 0,320, kSearchSize)] autorelease];
22     searchbar.placeholder=@"please enter keyword";
23     searchbar.autocorrectionType=UITextAutocapitalizationTypeNone;
24     searchbar.delegate=self;//设置代理
25 
26     //添加下拉框
27     SearchViewController *searchVC=[[[SearchViewController alloc] initWithStyle:UITableViewStylePlain] autorelease];
28     [searchVC .view setFrame:CGRectMake(30 , 40, 200, 0)];//0加载的时候高度为0隐藏
29     
30     [self.view addSubview:searchVC.view];
31     _searchVC=searchVC;
32     [self addChildViewController:searchVC];
33     view.tableHeaderView=searchbar;
34     [searchbar release];
35 
36 
37 }

tableview 的代理方法 cell是自定义的

#pragma mark -tableview datesource

-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView{

    return 1;

}

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

    returnself.mydata.count;

}

 

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

    static NSString *cellIndentify=@"mycell";

    UIMyCell *cell=[tableView dequeueReusableCellWithIdentifier:cellIndentify];

    if(cell==nil){

        

        cell=[[[UIMyCellalloc] initWithStyle:UITableViewCellStyleDefaultreuseIdentifier:cellIndentify] autorelease];

    }

    Restaurant *res=self.mydata[indexPath.row];

    cell.rest=res;

 

    return  cell;

}

 

#pragma mark -tableview delegate

-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{

    Restaurant *rest=self.mydata[indexPath.row];

    return rest.frame.cellHeight;

}

自定义下拉是一个uitableviewcontroller

//
//  SearchViewController.h
//  MyTestDemo001
//
//  Created by ganchaobo on 13-6-22.
//  Copyright (c) 2013年 ganchaobo. All rights reserved.
//

#import <UIKit/UIKit.h>

@interface SearchViewController : UITableViewController
@property(nonatomic,assign)NSMutableArray *mydate;
@end
#import <QuartzCore/QuartzCore.h>
@interface SearchViewController ()

@end
#import "Restaurant.h"
@implementation SearchViewController



- (void)viewDidLoad
{
    [super viewDidLoad];
//初始化的设置隐藏的tableiew的边框
    self.tableView.layer.borderWidth=1;
    self.tableView.layer.borderColor=[UIColor blackColor].CGColor;
    // Do any additional setup after loading the view.
    
}

#pragma mark -delegate source
-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView{
    return 1;
}

-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
    return self.mydate==nil?3:self.mydate.count;
}

-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
    static NSString *cellIndentify=@"SearchViewController";
    UITableViewCell *cell=[tableView dequeueReusableCellWithIdentifier:cellIndentify];
    if(cell==nil){
        cell=[[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIndentify] autorelease];
    }
    if(self.mydate!=nil){//第一加载为空。第二次有值
        Restaurant *res=self.mydate[indexPath.row];
        cell.textLabel.text=res.restaurantTitle;
    }
    return  cell;
}

-(void)setMydate:(NSMutableArray *)mydate{
    _mydate=mydate;//给外界设置。
    [self.tableView reloadData];
}


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

@end

在主窗口中设置下拉的uitableviewcontroller在view中隐藏和现实的位置

-(void)setSearchControllerHidden:(BOOL)hidden{
    NSInteger height=hidden?0:180;
    [UIView beginAnimations:nil context:nil];
    [UIView setAnimationDuration:0.1f];
    
    _searchVC.view.frame=CGRectMake(30, 40, 200, height);
    [UIView commitAnimations];
    
    
}

searchbar 的代理方法用的时候两个数组来完成，先清楚一个，然后遍历另一个数组

#pragma  mark -searchbar

- (void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText{
    
    [self SearchData:searchText];
}

//search
-(void)SearchData:(NSString*)searchText{
    [self.mydata removeAllObjects];//清除原来的
    if(searchText.length!=0){
        
        for (Restaurant *res in self.searchdata) {
            NSRange range=[res.restaurantTitle rangeOfString:searchText];
            if(range.length>0){
                [self.mydata addObject:res];//填充匹配的数据
                //现实下拉
                [self setSearchControllerHidden:NO];
               
            }
        }
         _searchVC.mydate=_mydata;
        
    }
    else{
        for (Restaurant *res in self.searchdata) {
            [self.mydata addObject:res];//填充匹配的数据
        }
        [self setSearchControllerHidden:NO];
    }
    [_tableview reloadData];

}


-(void)searchBarTextDidBeginEditing:(UISearchBar *)searchBar{
  searchBar.text=@"";
}

-(BOOL)searchBarShouldBeginEditing:(UISearchBar *)searchBar{
    searchBar.showsCancelButton=YES;
    for (id cc in searchBar.subviews) {
        if([cc isKindOfClass:[UIButton class]]){
        UIButton *btn=(UIButton *)cc;
        [btn setTitle:@"取消" forState:UIControlStateNormal];
        }
    }
    return YES;
}


-(void)searchBarCancelButtonClicked:(UISearchBar *)searchBar{
    searchBar.text=@"";
    [self SearchData:searchBar.text];
    [searchBar resignFirstResponder];
    //当点击取消按钮的时候隐藏
    [self setSearchControllerHidden:YES];
}