【问题标题】:Use Search Bar using dynamically generated array使用动态生成的数组使用搜索栏
【发布时间】:2016-12-28 05:48:21
【问题描述】:

我想使用 SearchBar 在服务的帮助下动态生成元素。就像,如果我将“i”作为参数传递,服务将获取所有包含“i”作为初始字符的元素。我无法检索逻辑作为如何在代码中实现它。

以下是用于获取数据的服务。但我不知道如何使用它来实现搜索栏。

NSURL * url=[NSURL URLWithString:@"http://dealnxt.com/api/search?searchkey=i"];
NSData * data=[NSData dataWithContentsOfURL:url];
NSError * error;
NSArray *array = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:&error];
NSLog(@"Array is:%@",array);

下面是我尝试过的代码:

.h 文件

#import <UIKit/UIKit.h>

@interface SearchViewController : UIViewController<UISearchDisplayDelegate,UITableViewDelegate,UITableViewDataSource,UISearchBarDelegate,UISearchResultsUpdating,UISearchControllerDelegate,UITextFieldDelegate>
{
    NSMutableArray *contentList;
    NSMutableArray *filteredContentList;
    BOOL isSearching;
}
@property (strong, nonatomic) IBOutlet UIView *SearchView;
@property (strong, nonatomic) IBOutlet UISearchBar *SearchBar;
@property (strong, nonatomic) IBOutlet UISearchDisplayController *Search;
@property (strong, nonatomic) IBOutlet UITableView *Content;

@end

.m 文件

 - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return 1;
 }

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
if (isSearching) {
    return [filteredContentList count];
}
else {
    return [contentList count];
}
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = @"Cell";

UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
    cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}

if (isSearching) {
    cell.textLabel.text = [filteredContentList objectAtIndex:indexPath.row];
}
else {
    cell.textLabel.text = [[contentList objectAtIndex:indexPath.row] valueForKey:@"shortdescription"];

}
return cell;

}
- (void)searchTableList {
NSString *searchString = _SearchBar.text;

NSString *UrlString =[NSString stringWithFormat:@"http://dealnxt.com/api/search?searchkey=%@",searchString];
NSMutableURLRequest *Request = [[NSMutableURLRequest alloc] init];
[Request setURL:[NSURL URLWithString:UrlString]];
[Request setHTTPMethod:@"GET"];
NSData *ReturnData = [NSURLConnection sendSynchronousRequest:Request returningResponse:nil error:nil];
NSString *str=[[NSString alloc]initWithData:ReturnData encoding:NSUTF8StringEncoding];
NSDictionary *jsonDict = [NSJSONSerialization JSONObjectWithData:[str dataUsingEncoding:NSUTF8StringEncoding] options:NSJSONReadingMutableContainers error:nil];
contentList=[jsonDict objectForKey:@"ProductDescriptionModel"];

    [filteredContentList addObject:[[contentList firstObject] valueForKey:@"shortdescription"]];

}
- (void)searchBarTextDidBeginEditing:(UISearchBar *)searchBar {
isSearching = YES;

}

- (void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText {
NSLog(@"Text change - %d",isSearching);

//Remove all objects first.
[filteredContentList removeAllObjects];

if([searchText length] != 0) {
    isSearching = YES;
    [self searchTableList];
}
else {
    isSearching = NO;
}
}

- (void)searchBarCancelButtonClicked:(UISearchBar *)searchBar {
NSLog(@"Cancel clicked");
}

- (void)searchBarSearchButtonClicked:(UISearchBar *)searchBar {
NSLog(@"Search Clicked");
[self searchTableList];
}

【问题讨论】:

  • 看看正则表达式。
  • 根据您的代码,服务器端需要为您发送的参数做工作。前端没有工作。
  • 在您的UIViewController 顶部实现一个搜索栏,允许用户输入他/她想要的任何内容。并根据您的要求按 search 按钮或更改字符执行搜索。将值传递给 API,然后在 UITableView 中显示响应
  • 检查这个stackoverflow.com/questions/18719517/…。在委托方法中,您可以调用具有上述代码的方法。当用户在搜索栏中写字母时,将调用该方法。试试这个并更新代码。然后我可以检查问题出在哪里,因为我还不知道您的所有要求。
  • @Amanpreet :) :) 您的指导。谢谢你:)

标签: ios objective-c xcode uisearchbar


【解决方案1】:

解决办法如下:

.h 文件 #导入

@interface SearchViewController : UIViewController<UISearchDisplayDelegate,UITableViewDelegate,UITableViewDataSource,UISearchBarDelegate,UISearchResultsUpdating,UISearchControllerDelegate,UITextFieldDelegate>
{
   NSMutableArray *contentList;
   NSMutableArray *filteredContentList;
   BOOL isSearching;
}
@property (strong, nonatomic) IBOutlet UIView *SearchView;
@property (strong, nonatomic) IBOutlet UISearchBar *SearchBar;
@property (strong, nonatomic) IBOutlet UISearchDisplayController *Search;
@property (strong, nonatomic) IBOutlet UITableView *Content;

@end

.m 文件

 #import "SearchViewController.h"
 #import "UIColor+HexString.h"

 @interface SearchViewController ()

 @end

 @implementation SearchViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    _SearchView.backgroundColor=[UIColor colorWithHexString:@"#5130F7"];
   _SearchBar.barTintColor=[UIColor colorWithHexString:@"#5130F7"];
   _SearchBar.layer.borderWidth = 1;
   _SearchBar.layer.borderColor = [UIColor colorWithHexString:@"#5130F7"].CGColor;

   _Content.delegate=self;
   _Content.dataSource=self;
  }

 - (void)didReceiveMemoryWarning {
   [super didReceiveMemoryWarning];

 }

 - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
     return 1;
  }

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

   if (isSearching) {
    return [filteredContentList count];
}
  else {
    return [contentList count];
}
}

 - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = @"Cell";

UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
    cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}

if (isSearching) {
    cell.textLabel.text = [filteredContentList objectAtIndex:indexPath.row];
}
else {
    cell.textLabel.text = [[contentList objectAtIndex:indexPath.row] valueForKey:@"shortdescription"];

}
return cell;

}
- (void)searchTableList {
NSString *searchString = _SearchBar.text;

NSString *UrlString =[NSString stringWithFormat:@"http://abc.in/key?key=%@",searchString];
NSMutableURLRequest *Request = [[NSMutableURLRequest alloc] init];
[Request setURL:[NSURL URLWithString:UrlString]];
[Request setHTTPMethod:@"GET"];
NSData *ReturnData = [NSURLConnection sendSynchronousRequest:Request returningResponse:nil error:nil];
NSString *str=[[NSString alloc]initWithData:ReturnData encoding:NSUTF8StringEncoding];
NSDictionary *jsonDict = [NSJSONSerialization JSONObjectWithData:[str dataUsingEncoding:NSUTF8StringEncoding] options:NSJSONReadingMutableContainers error:nil];
contentList=[jsonDict objectForKey:@"ProductDescriptionModel"];

filteredContentList =[contentList valueForKey:@"shortdescription"];


NSLog(@"filter:%@",filteredContentList);
[_Content reloadData];

}
- (void)searchBarTextDidBeginEditing:(UISearchBar *)searchBar {
isSearching = YES;

}

- (void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText {
NSLog(@"Text change - %d",isSearching);

//[filteredContentList removeAllObjects];

if([searchText length] != 0) {
    isSearching = YES;
    [self searchTableList];
}
else {
    isSearching = NO;
}
}

- (void)searchBarCancelButtonClicked:(UISearchBar *)searchBar {
NSLog(@"Cancel clicked");
}

- (void)searchBarSearchButtonClicked:(UISearchBar *)searchBar {
NSLog(@"Search Clicked");
[self searchTableList];
}

 @end

【讨论】:

    【解决方案2】:

    从动态数组中搜索任何内容的简便方法

    你的控制器.m

    {
    NSMutableArray *contacts;
    NSMutableArray *combinearray;
    NSString *searchTextString;
    NSMutableArray *searchArray;
    BOOL isFilter;
    }
    
    
    - (void)viewDidLoad {
    [super viewDidLoad];
    
    txtSearchBar.backgroundColor=Clear;
    
    txtSearchBar.layer.cornerRadius=2;
    txtSearchBar.clipsToBounds=YES;
    txtSearchBar.delegate =self;
    txtSearchBar.layer.borderColor=Black.CGColor;
    txtSearchBar.layer.borderWidth=2.0f;
    [txtSearchBar addTarget:self action:@selector(textFieldDidChange:) forControlEvents:UIControlEventEditingChanged];
    txtSearchBar.layer.sublayerTransform = CATransform3DMakeTranslation(20, 0, 0);
    
    }
    
    
    - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
    {
    // Return the number of rows in the section.
    
    
    if(isFilter)
    {
        return [searchArray count];
    }
    else
    return  arrCardsName.count;
    }
    
    
    - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
    {
    if(isFilter)
    {
    yourDictionary = [searchArray objectAtIndex:indexPath.row];
    }
    
    else
    
    {
    yourDictionary = [yourArray objectAtIndex:indexPath.row];
    }
    
    return cell;
    
    }
    
    
    -(void)textFieldDidChange:(UITextField*)textField
    {
    searchTextString = textField.text;
    
    [self updateSearchArray:searchTextString];
    }
    
    -(void)updateSearchArray:(NSString *)searchText
    
    {
    
    if (searchText.length > 0)
    {
        isFilter=YES;
    
        searchArray = [NSMutableArray array];
        searchText = [NSString stringWithFormat:@"%@",searchText];
    
    
    
        for ( NSDictionary* item in yourArray )
        {
            //NSLog(@"contacts ----->%@",[item objectForKey:@"city"]);
    
            if ([[[item objectForKey:@"city"] lowercaseString] rangeOfString:[searchText lowercaseString]].location != NSNotFound)//object for key @"do whatever you want to search"
            {
    
                [searchArray addObject:item];
            }
        }
    
    
    }
    
    if (!searchText || searchText.length == 0)
    {
        isFilter=NO;
        searchArray = [yourArray mutableCopy];
    }
    else
    {
        if ([searchArray count] == 0)
        {
            NSLog(@"No data From Search");
        }
    }
    // NSLog(@"search array ====>%@",searchArray);
    [tbleView reloadData];
    
    }
    

    【讨论】:

      猜你喜欢
      • 2014-09-14
      • 1970-01-01
      • 1970-01-01
      • 1970-01-01
      • 1970-01-01
      • 2018-05-14
      • 1970-01-01
      • 2011-08-27
      • 1970-01-01
      相关资源
      最近更新 更多