Question

*更新：这实际上有效，我的自定义单元格的样式没有遇到，所以单元格看起来是空白的。如何让searchResultsTableView使用我的自定义单元格？

我在表格视图中实现了一个搜索栏。在我调试时搜索，过滤所有工作，但是当我在搜索栏中输入字符时，结果不会加载或显示。这就是我所做的一切：

@interface InviteTableViewController ()<UIAlertViewDelegate, UISearchBarDelegate, UISearchDisplayDelegate>

@property(nonatomic, strong) NSNumber *contactsCount;
@property(nonatomic, strong) InviteTableViewCell *selectedCell;

@property(strong, nonatomic) NSMutableArray *filteredContactArray;
@property (weak, nonatomic) IBOutlet UISearchBar *contactsSearchBar;
@end

@implementation InviteTableViewController

- (id)initWithStyle:(UITableViewStyle)style
{
    self = [super initWithStyle:style];
    if (self) {
        // Custom initialization
    }
    return self;
}

- (void) extractAllContacts: (ABAddressBookRef) addressBookRef{
    NSMutableArray *contactsArray = [NSMutableArray array];
    CFArrayRef allPeople = ABAddressBookCopyArrayOfAllPeople(addressBookRef);
    CFIndex numberOfPeople = ABAddressBookGetPersonCount(addressBookRef);

    for(int i = 0; i < numberOfPeople; i++){
        ABRecordRef person = CFArrayGetValueAtIndex( allPeople, i );
        NSString *firstName = (__bridge NSString *)(ABRecordCopyValue(person, kABPersonFirstNameProperty));
        if(firstName){
        ABMultiValueRef emails = ABRecordCopyValue(person, kABPersonEmailProperty);

        for (CFIndex i = 0; i < ABMultiValueGetCount(emails); i++) {
            NSString *email = (__bridge_transfer NSString *) ABMultiValueCopyValueAtIndex(emails, i);
            MyUser *amUser = [[MyUser alloc] init];
            amUser.email =email;

            NSString *fullName =[NSString stringWithFormat:@"%@ %@",firstName, (__bridge NSString *)(ABRecordCopyValue(person, kABPersonLastNameProperty))];
            amUser.fullName = fullName;
            [contactsArray addObject:amUser];
        }

        }

    }

    NSLog(@"================================count ============= %d", [contactsArray count]);
    contactsArray = [contactsArray sortedArrayUsingComparator:^NSComparisonResult(id a, id b) {
        NSDate *first = [(MyUser*) a fullName];
        NSDate *second = [(MyUser*)b fullName];
        return [first compare:second];
    }];
    self.inviteContactsArray = contactsArray;
    self.filteredContactArray = [NSMutableArray arrayWithCapacity:[contactsArray count]];

    [self.tableView reloadData];


}

- (void)viewDidLoad
{
    [super viewDidLoad];  

    _contactsCount = [NSNumber numberWithInt:0];


    ABAddressBookRef addressBookRef = ABAddressBookCreateWithOptions(NULL, NULL);

    if (ABAddressBookGetAuthorizationStatus() == kABAuthorizationStatusNotDetermined) {
        ABAddressBookRequestAccessWithCompletion(addressBookRef, ^(bool granted, CFErrorRef error) {
            if (granted) {
                [self extractAllContacts: addressBookRef];
                [self.tableView reloadData];
            } else {
                NSString *message = [NSString stringWithFormat:@"You have not given permission to use your address book.  Please allow in settings "];
                UIAlertView* alert = [[UIAlertView alloc] initWithTitle:@"Enable Contacts" message:message delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];

                [alert show];
            }
        });
    }
    else if (ABAddressBookGetAuthorizationStatus() == kABAuthorizationStatusAuthorized) {
        // The user has previously given access, add the contact
        [self extractAllContacts:addressBookRef];
    }
    else {
        // The user has previously denied access
        // Send an alert telling user to change privacy setting in settings app
    }

[self.tableView reloadData];
}

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

#pragma mark - Table view data source

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
    // Return the number of sections.
    return 1;
}

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

    if (tableView == self.searchDisplayController.searchResultsTableView) {
        return [self.filteredContactArray count];
    } else {
        return [self.inviteContactsArray count];
    }
}

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


    static NSString *CellIdentifier = @"InviteCell";

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

    MyUser *person = nil;

    if (tableView == self.searchDisplayController.searchResultsTableView)
    {

        person = [self.filteredContactArray objectAtIndex:[indexPath row]];
        NSMutableArray *tempArray = self.filteredContactArray;

    }
    else
    {
        person = [self.inviteContactsArray objectAtIndex:[indexPath row]];
    }




    //InviteTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];

    person = [self.inviteContactsArray objectAtIndex:indexPath.row];

    cell.nameLabel.text = person.fullName;
    cell.emailLabel.text = person.email;

    return cell;

}




#pragma mark Content Filtering
-(void)filterContentForSearchText:(NSString*)searchText scope:(NSString*)scope {


    // Update the filtered array based on the search text and scope.
    // Remove all objects from the filtered search array
    [self.filteredContactArray removeAllObjects];
    // Filter the array using NSPredicate
    NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF.fullName contains[c] %@",searchText];
    self.filteredContactArray = [NSMutableArray arrayWithArray:[self.inviteContactsArray filteredArrayUsingPredicate:predicate]];


}

#pragma mark - UISearchDisplayController Delegate Methods

-(BOOL)searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchString:(NSString *)searchString
{
    [self filterContentForSearchText:searchString
                               scope:[[self.searchDisplayController.searchBar scopeButtonTitles]
                                      objectAtIndex:[self.searchDisplayController.searchBar
                                                     selectedScopeButtonIndex]]];

    return YES;
}


@end

这就是它的样子：

enter image description here

Answer 1

同意@rdelmar。

但是如果你改变

中的代码，TableView中有一种棘手的行为

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    ....
    InviteTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    ....
}

到

InviteTableViewCell *cell = [self.tableView dequeueReusableCellWithIdentifier:CellIdentifier];

如果添加前缀“self”。你的代码应该工作正常。

和

if ( cell == nil )
 {
    cell = [[InviteTableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier];
 }

是不必要的。它只是为你创建一个标准的“字幕单元格”，看起来不是你想要的，只需删除它们即可。

Answer 2

如果要对主表和搜索结果表使用相同的单元格，则应将单元格设置为xib（或者可以完全在代码中完成）。在viewDidLoad中，为两个表视图注册nib，

- (void)viewDidLoad {
    [super viewDidLoad];
    [self.searchDisplayController.searchResultsTableView registerNib:[UINib nibWithNibName:@"InviteTableViewCell" bundle:nil] forCellReuseIdentifier:@"InviteCell"];
    [self.tableView registerNib:[UINib nibWithNibName:@"InviteTableViewCell" bundle:nil] forCellReuseIdentifier:@"inviteCell"];
}

在cellForRowAtIndexPath中，你可以这样做，

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    InviteTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"InviteCell" forIndexPath:indexPath];
    MyUser *person = ([tableView isEqual:self.tableView])? self.inviteContactsArray[indexPath.row] : self.filteredContactArray[indexPath row];
    cell.nameLabel.text = person.fullName;
    cell.emailLabel.text = person.email;
    return cell;
}

如果您已经在故事板中设置了单元格，则可以将其复制并粘贴到空的xib文件中，这样您就不必再重新设置它。您可以从故事板表视图中删除单元格，因为您将从xib文件中获取单元格。

Answer 3

viewdidload中的下一行应该可以解决问题

self.searchDisplayController.searchResultsTableView.rowHeight = self.tableView.rowHeight

iOS搜索栏无法显示结果

3 个答案: