我有一个包含项目列表的表格。每个单元格都有项目标题，背景图像和单击单元格时打开的URL。
我有一个工作搜索功能，可以搜索标题，并使用符合搜索条件的项目更新它创建的表格。不幸的是，只有标题显示在searchResults表视图中，并且单击更新的单元格时没有任何反应。我不知道如何为细胞或网址显示附带的图像。
我认为问题是因为我只搜索标题并填充searchResults数组，该数组构成了搜索标题的searchResults表的内容，这忽略了附带的图像和网址。我不确定如何通过搜索标题来包含标题，图片和网址。
信息来自json，格式为：
{
"items":
[
{
"title":"title1",
"url":"url1",
"thumbnail":"thumbnailURL1"
},
{
"title":"title2",
"url":"url2",
"thumbnail":"thumbnailURL2"
}
]
}
我的其余代码如下所示：
#import "WikiViewController.h"
#import "NavigationViewController.h"
#import "WebViewController.h"
#import "WikiSearchResultsViewController.h"
@interface WikiViewController () <NSURLSessionDataDelegate, UISearchResultsUpdating, UISearchControllerDelegate>
@property (nonatomic) NSURLSession *session;
@property (nonatomic, copy) NSArray *jsonArray;
@property (strong, nonatomic) UISearchController *controller;
@property (strong, nonatomic) NSArray *results;
@end
@implementation WikiViewController
#pragma mark - viewDid...
- (void)viewDidLoad
{
[super viewDidLoad];
[self.tableView registerClass:[UITableViewCell class]
forCellReuseIdentifier:@"UITableViewCell" ];
self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemSearch target:self action:@selector(searchButtonPressed:)];
WikiSearchResultsViewController *searchResults = (WikiSearchResultsViewController *)self.controller.searchResultsController;
[self addObserver:searchResults forKeyPath:@"results" options:NSKeyValueObservingOptionNew context:nil];
}
# pragma mark - Search Results Updater
- (void)updateSearchResultsForSearchController:(UISearchController *)searchController {
// filter the search results
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF contains [cd] %@", self.controller.searchBar.text];
self.results = [[self.jsonArray valueForKey:@"title"] filteredArrayUsingPredicate:predicate];
}
- (void)searchButtonPressed:(id)sender {
// present the search controller
[self presentViewController:self.controller animated:YES completion:nil];
}
- (UISearchController *)controller {
if (!_controller) {
// instantiate search results table view
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Wiki" bundle:nil];
WikiSearchResultsViewController *resultsController = [storyboard instantiateViewControllerWithIdentifier:@"SearchResults"];
// create search controller
_controller = [[UISearchController alloc]initWithSearchResultsController:resultsController];
_controller.searchResultsUpdater = self;
// optional: set the search controller delegate
_controller.delegate = self;
}
return _controller;
}
#pragma mark - Table View
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [self.jsonArray count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"UITableViewCell"
forIndexPath:indexPath];
NSDictionary *item = self.jsonArray[indexPath.row];
if (![item[@"thumbnail"] isKindOfClass:[NSNull class]]) {
NSString *urlString = [[NSString alloc] initWithString:item[@"thumbnail"]];
NSURL *url = [NSURL URLWithString:urlString];
NSData * imageData = [[NSData alloc] initWithContentsOfURL: url];
UIImageView *bgImageView = [[UIImageView alloc] initWithImage:[UIImage imageWithData:imageData]];
[bgImageView setContentMode:UIViewContentModeScaleAspectFill];
[bgImageView setClipsToBounds:YES];
cell.backgroundView = bgImageView;
}
cell.backgroundColor = [UIColor clearColor];
cell.textLabel.text = item[@"title"];
return cell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
WebViewController *webViewController = [[WebViewController alloc] init];
NSDictionary *item = self.jsonArray[indexPath.row];
NSURL *baseURL = [NSURL URLWithString:@"http://www.baseurl.com"];
NSURL *URL = [NSURL URLWithString:item[@"url"] relativeToURL:baseURL];
webViewController.URL = URL;
[self.navigationController pushViewController:webViewController
animated:YES];
}
#pragma mark - Creating NSURLSession
- (instancetype)initWithStyle:(UITableViewStyle)style
{
self = [super initWithStyle:style];
if (self) {
NSURLSessionConfiguration *config = [NSURLSessionConfiguration defaultSessionConfiguration];
_session = [NSURLSession sessionWithConfiguration:config
delegate:self
delegateQueue:nil];
[self fetchFeed];
}
return self;
}
- (void)fetchFeed
{
NSString *requestString = @"http://www.requeststring.com";
NSURL *url = [NSURL URLWithString:requestString];
NSURLRequest *req = [NSURLRequest requestWithURL:url];
NSURLSessionDataTask *dataTask = [self.session dataTaskWithRequest:req
completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
NSDictionary *jsonObject = [NSJSONSerialization JSONObjectWithData:data
options:0
error:nil];
self.jsonArray = jsonObject[@"items"];
NSLog(@"%@", self.jsonArray);
dispatch_async(dispatch_get_main_queue(), ^{[self.tableView reloadData];
});
}];
[dataTask resume];
}
@end
#import "WikiSearchResultsViewController.h"
#import "WikiViewController.h"
#import "WebViewController.h"
@interface WikiSearchResultsViewController () <NSURLSessionDataDelegate, UITableViewDataSource, UITableViewDelegate, UISearchControllerDelegate>
@property (nonatomic, strong) NSArray *searchResults;
@property (nonatomic) NSURLSession *session;
@property (nonatomic, copy) NSArray *jsonArray;
@end
@implementation WikiSearchResultsViewController
- (void)viewDidLoad {
[super viewDidLoad];
NSURLSessionConfiguration *config = [NSURLSessionConfiguration defaultSessionConfiguration];
_session = [NSURLSession sessionWithConfiguration:config
delegate:self
delegateQueue:nil];
[self fetchFeed];
}
#pragma mark - Table view data source
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return self.searchResults.count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell *cell = [self.tableView dequeueReusableCellWithIdentifier:@"UITableViewCell" forIndexPath:indexPath];
cell.backgroundColor = [UIColor clearColor];
cell.textLabel.text = [self.searchResults objectAtIndex:indexPath.row];
cell.textLabel.textColor = [UIColor blackColor];
return cell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
WebViewController *webViewController = [[WebViewController alloc] init];
for (NSDictionary *item in _jsonArray){
NSURL *baseURL = [NSURL URLWithString:@"http://www.baseurl.com"];
NSURL *URL = [NSURL URLWithString:item[@"url"] relativeToURL:baseURL];
webViewController.title = [self.searchResults objectAtIndex:indexPath.row];
webViewController.URL = URL;
[self.navigationController pushViewController:webViewController
animated:YES];
}
}
- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary<NSString *,id> *)change context:(void *)context {
// extract array from observer
self.searchResults = [(NSArray *)object valueForKey:@"results"];
[self.tableView reloadData];
}
#pragma mark - Creating NSURLSession
- (void)fetchFeed
{
NSString *requestString = @"http://www.requeststring.com";
NSURL *url = [NSURL URLWithString:requestString];
NSURLRequest *req = [NSURLRequest requestWithURL:url];
NSURLSessionDataTask *dataTask = [self.session dataTaskWithRequest:req
completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
NSDictionary *jsonObject = [NSJSONSerialization JSONObjectWithData:data
options:0
error:nil];
self.jsonArray = jsonObject[@"items"];
NSLog(@"%@", self.jsonArray);
dispatch_async(dispatch_get_main_queue(), ^{[self.tableView reloadData];
});
}];
[dataTask resume];
}
@end