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我正在寫一個iOS應用程序（從iOS教程更新的應用程序）。它具有UITableView和UISearchBar的視圖（謝謝Ayan和Tommy）。我現在的問題在於，該表顯示了來自核心數據實體的所有記錄，當我點擊一個單元格時，該應用程序顯示了選定單元格的詳細視圖。這工作正常。問題是，在使用搜索方法後，如果我點擊搜索結果單元格，應用程序不會顯示選定單元格的詳細視圖。我想我必須確定搜索記錄的發件人的任何位置，但不知道如何或在何處包含此內容。 這是我此刻的代碼，任何幫助或提示，歡迎...謝謝你帶有tableview和搜索功能的iOS應用程序
#import "PersonsTVC.h"
#import "Person.h"
@implementation PersonsTVC
@synthesize fetchedResultsController = __fetchedResultsController;
@synthesize managedObjectContext = __managedObjectContext;
@synthesize selectedPerson;
@synthesize searchResults;
- (void)setupFetchedResultsController
{
NSString *entityName = @"Person";
NSLog(@"Setting up a Fetched Results Controller for the Entity named %@", entityName);
NSFetchRequest *request = [NSFetchRequest fetchRequestWithEntityName:entityName];
request.sortDescriptors = [NSArray arrayWithObject:[NSSortDescriptor sortDescriptorWithKey:@"firstname"
ascending:YES
selector:@selector(localizedCaseInsensitiveCompare:)]];
self.fetchedResultsController = [[NSFetchedResultsController alloc] initWithFetchRequest:request
managedObjectContext:self.managedObjectContext
sectionNameKeyPath:nil
cacheName:nil];
[self performFetch];
}
- (void) viewDidLoad
{
self.searchResults = [NSMutableArray arrayWithCapacity:[[self.fetchedResultsController fetchedObjects] count]];
[self.tableView reloadData];
}
-(void) viewDidUnload{
self.searchResults = nil;
}
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
[self setupFetchedResultsController];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = @"Persons Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
// Configure the cell...
// Configure the cell...
Person *person = nil;
if (tableView == self.searchDisplayController.searchResultsTableView)
{
NSLog(@"Configuring cell to show search results");
person = [self.searchResults objectAtIndex:indexPath.row];
}
else
{
NSLog(@"Configuring cell to show normal data");
person = [self.fetchedResultsController objectAtIndexPath:indexPath];
}
NSString *fullname = [NSString stringWithFormat:@"%@ %@", person.firstname, person.surname];
cell.textLabel.text = person.firstname;
if ([person.inRole.color isEqual :@"Yellow"])
{
cell.imageView.image = [UIImage imageNamed:@"Yellow"];
}
if ([person.inRole.color isEqual :@"Black"])
{
cell.imageView.image = [UIImage imageNamed:@"Black"];
}
if ([person.inRole.color isEqual :@"Grey"])
{
cell.imageView.image = [UIImage imageNamed:@"Grey"];
}
if ([person.inRole.color isEqual :@"Red"])
{
cell.imageView.image = [UIImage imageNamed:@"Red"];
}
if ([person.inRole.color isEqual :@"Blue"])
{
cell.imageView.image = [UIImage imageNamed:@"Blue"];
}
if ([person.inRole.color isEqual :@"Dark Green"])
{
cell.imageView.image = [UIImage imageNamed:@"DarkGreen"];
}
if ([person.inRole.color isEqual :@"Light Green"])
{
cell.imageView.image = [UIImage imageNamed:@"LightGreen"];
}
if ([person.inRole.color isEqual :@"Light Blue"])
{
cell.imageView.image = [UIImage imageNamed:@"LightBlue"];
}
if ([person.inRole.color isEqual :@"Brown"])
{
cell.imageView.image = [UIImage imageNamed:@"Brown"];
}
if ([person.inRole.color isEqual :@"Dark Orange"])
{
cell.imageView.image = [UIImage imageNamed:@"DarkOrange"];
}
cell.detailTextLabel.text = person.surname;
//cell.textLabel.text = person.firstname;
return cell;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
if (tableView == self.searchDisplayController.searchResultsTableView)
{
return [self.searchResults count];
}
else
{
return [[[self.fetchedResultsController sections] objectAtIndex:section] numberOfObjects];
}
}
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
if (editingStyle == UITableViewCellEditingStyleDelete) {
[self.tableView beginUpdates]; // Avoid NSInternalInconsistencyException
// Delete the person object that was swiped
Person *personToDelete = [self.fetchedResultsController objectAtIndexPath:indexPath];
NSLog(@"Deleting (%@)", personToDelete.firstname);
[self.managedObjectContext deleteObject:personToDelete];
[self.managedObjectContext save:nil];
// Delete the (now empty) row on the table
[self.tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
[self performFetch];
[self.tableView endUpdates];
}
}
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
if ([segue.identifier isEqualToString:@"Add Person Segue"])
{
NSLog(@"Setting PersonsTVC as a delegate of PersonDetailTVC");
PersonDetailTVC *personDetailTVC = segue.destinationViewController;
personDetailTVC.delegate = self;
NSLog(@"Creating a new person and passing it to PersonDetailTVC");
Person *newPerson = [NSEntityDescription insertNewObjectForEntityForName:@"Person"
inManagedObjectContext:self.managedObjectContext];
personDetailTVC.person = newPerson;
}
else if ([segue.identifier isEqualToString:@"Person Detail Segue"])
{
NSLog(@"Setting PersonsTVC as a delegate of PersonDetailTVC");
PersonDetailTVC *personDetailTVC = segue.destinationViewController;
personDetailTVC.delegate = self;
// Store selected Person in selectedPerson property
NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow];
self.selectedPerson = [self.fetchedResultsController objectAtIndexPath:indexPath];
NSLog(@"Passing selected person (%@) to PersonDetailTVC", self.selectedPerson.firstname);
personDetailTVC.person = self.selectedPerson;
}
else {
NSLog(@"Unidentified Segue Attempted!");
}
}
- (void)theSaveButtonOnThePersonDetailTVCWasTapped:(PersonDetailTVC *)controller
{
// do something here like refreshing the table or whatever
// close the delegated view
[controller.navigationController popViewControllerAnimated:YES];
}
#pragma mark -
#pragma mark Content Filtering
-(void)filterContentForSearchText:(NSString*)searchText scope:(NSString*)scope {
self.searchResults = [[self.fetchedResultsController fetchedObjects] filteredArrayUsingPredicate:[NSPredicate predicateWithBlock:^BOOL(id evaluatedObject, NSDictionary *bindings) {
Person* person = evaluatedObject;
NSString* firstName = person.firstname;
//searchText having length < 3 should not be considered
if (!!searchText && [searchText length] < 3) {
return YES;
}
if ([scope isEqualToString:@"All"] || [firstName isEqualToString:scope]) {
return ([firstName rangeOfString:searchText].location != NSNotFound);
}
return NO; //if nothing matches
}]];
}
#pragma mark -
#pragma mark UISearchDisplayController Delegate Methods
- (BOOL)searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchString:(NSString *)searchString
{
[self filterContentForSearchText:searchString scope:@"All"];
return YES;
}
- (BOOL)searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchScope:(NSInteger)searchOption
{
[self filterContentForSearchText:[self.searchDisplayController.searchBar text] scope:@"All"];
return YES;
}
@end
請按照[教程]（http://www.raywenderlich.com/16873/how-to-add-search-into-a-table-view），特別是「將數據發送到詳細信息視圖」。但是，在你發佈這類查詢之前，請確保你已經做了足夠的研究，否則它只會增加站點負擔，而你的問題將被輪流投票和刪除。 –
我看過推薦的教程，但我沒有找到解決問題的方法，我看到在推薦教程中有兩個tableviews，在我的應用程序中只有一個有兩個不同的數組，一個是正常的包含所有記錄的視圖，以及包含已過濾記錄的視圖。我很抱歉，但我需要一點幫助... – mvasco
好吧，有你的想法。我的建議是始終使用過濾的結果集作爲表的數據源。過濾的結果集將根據您可能已經想出的搜索過濾器進行過濾。然後在你的'cellForRowAtIndexPath'方法中刪除檢查'if（tableView == self.searchDisplayController.searchResultsTableView）'並且使用'person = [self.searchResults objectAtIndex：indexPath.row];'爲始終。 –