Question

您好我使用UITableView创建自定义联系人视图。我获取了所有联系人并使用了表relodData，但未在表格中显示。只需点击一下表，即可看到数据。在视图中，我会打电话来取回手机中的所有联系人，完成后它会重新加载tableView以使联系人可见，但它显示我是点击它还是打开其他视图然后回来。

#import "CMContatcsVC.h"
#import "CMContatcsTableCell.h"

@implementation CMContatcsVC 

//======================================================================================================================================================
#pragma mark - VIEW LIFE CYCLE
//======================================================================================================================================================

- (void)viewDidLoad
{
    [super viewDidLoad];
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
}

-(void)viewWillAppear:(BOOL)animated
{
    [super viewWillAppear:animated];

    [self.tableView setDelegate:self];
    [self.tableView setDataSource:self];

    [self fetchAllContactsCompletionHandler:^(BOOL granted, NSError * _Nullable error) {


        [self.tableView reloadData];
        NSLog(@"COUNT_IN_COMPLETION_HANDLER :: %lu", (unsigned long)self.contactArray.count);
    }];
}

-(void)viewWillDisappear:(BOOL)animated
{
    [super viewWillDisappear:animated];
}

//======================================================================================================================================================
#pragma mark - TABLE VIEW DELEGATES METHODS
//======================================================================================================================================================

-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{

}

-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
    NSLog(@"TABLE SECTION");
    return 1;
}

-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    NSLog(@"TABLE ROWS :: %lu",(unsigned long)self.contactArray.count);
    return self.contactArray.count;
}

-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
     NSLog(@"TABLE CELL FPR ROW");
    CMContatcsTableCell *contactCell = (CMContatcsTableCell *)[tableView dequeueReusableCellWithIdentifier:@"CMContatcsTableCell" forIndexPath:indexPath];

    @try
    {
        CMCustomContacts * contact = [self.contactArray objectAtIndex:indexPath.row];
        [contactCell.profileImgView setImage:contact.profileImage];
        [contactCell.nameLabel setText:contact.firstName];
        NSLog(@"TABLE CELL CNT NAME :: %@", contact.firstName);
        [contactCell.contactLabel setText:[contact.phoneArray objectAtIndex:0]];
    }
    @catch (NSException *exception)
    {
        NSLog(@"TABLE CELL EXCEPTION :: %@", exception.description);
    }
    @finally
    {}

    return contactCell;
}

//======================================================================================================================================================
#pragma mark - FETCH ALL CONTACTS
//======================================================================================================================================================

-(void)fetchAllContactsCompletionHandler:(void(^)(BOOL granted, NSError * _Nullable error))completion
{
    self.contactArray = [[NSMutableArray alloc] init];

    CNContactStore *store = [[CNContactStore alloc] init];
    [store requestAccessForEntityType:CNEntityTypeContacts completionHandler:^(BOOL granted, NSError * _Nullable error) {

        if (granted)
        {
            NSArray *keys = @[CNContactNamePrefixKey, CNContactFamilyNameKey, CNContactGivenNameKey,
                              CNContactPhoneNumbersKey, CNContactImageDataKey, CNContactEmailAddressesKey];

            NSString *containerId = store.defaultContainerIdentifier;
            NSPredicate *predicate = [CNContact predicateForContactsInContainerWithIdentifier:containerId];
            NSError *error;
            NSArray *cnContacts = [store unifiedContactsMatchingPredicate:predicate keysToFetch:keys error:&error];

            if (error)
            {
                NSLog(@"ERROR IN FETCHING CONTACTS :: %@", error.description);
            }
            else
            {
                for (CNContact *contact in cnContacts)
                {
                    @try
                    {
                        CMCustomContacts *newContact = [[CMCustomContacts alloc] init];
                        newContact.phoneArray = [[NSMutableArray alloc] init];
                        newContact.emailArray = [[NSMutableArray alloc] init];

                        newContact.firstName = contact.givenName;
                        newContact.lastName = contact.familyName;

                        UIImage *image = [UIImage imageWithData:contact.imageData];
                        newContact.profileImage = image;

                        for (CNLabeledValue *label in contact.phoneNumbers)
                        {
                            NSString *phone = [label.value stringValue];
                            if ([phone length] > 0)
                            {
                                [newContact.phoneArray addObject:phone]; NSLog(@"PHONE :: %@",phone);
                            }
                        }

                        for (CNLabeledValue *label in contact.emailAddresses)
                        {
                            NSString *email = label.value;
                            if ([email length] > 0)
                            {
                                [newContact.emailArray addObject:email];  NSLog(@"EMAIL :: %@",email);
                            }
                        }

                        [self.contactArray addObject:newContact];
                    }
                    @catch (NSException *exception)
                    {
                        NSLog(@"EXCEPTION IN CONTACTS :: %@", exception.description);
                    }
                    @finally
                    {
                        NSLog(@"FINALLY");
                    }
                }

                NSLog(@"COUNT OF CONTACTS :: %lu", (unsigned long)self.contactArray.count);
            }
        }
        completion(granted, error);
    }];
}

@end

Answer 1

始终更新主^AB.*\/$ ^ - matches the start of the string AB - matches the string 'AB' exactly .* - matches any character ('.') any number of times ('*') \/ - matches the literal character '/' (backslash is the escape character) $ - matches the end of the string上的UI，因此请在主thread上致电reloadData TableView。

thread

ios：当我点击它时，UITableView正在显示数据

1 个答案: