在IOS中无法从PhoneBook访问联系人

Question

我想在IOS中访问电话簿中的所有联系人。我试过下面的代码

    CFErrorRef error = NULL;

    ABAddressBookRef addressBook = ABAddressBookCreateWithOptions(NULL, &error);

    if (addressBook != nil)
    {
        NSLog(@"Succesful.");

        NSArray *allContacts = (__bridge_transfer NSArray *)ABAddressBookCopyArrayOfAllPeople(addressBook);

    }

这段代码运行良好，所有联系人都存储在我的演示项目中的"allContacts“数组中，但是当我将这段代码放入现有项目中时，它返回了"nil”记录。下面是我现有项目的头文件和实现文件，实际上我想在其中使用它。

//.h file
#import <UIKit/UIKit.h>
#import <AddressBook/AddressBook.h>
#import <AddressBookUI/AddressBookUI.h>

@interface TestingViewController : UIViewController
-(IBAction)GetContacts;
-(void)GetPBAccess;
@end


    //.m file
    #import "TestingViewController.h"
    #import <AddressBook/AddressBook.h>
    #import <AddressBookUI/AddressBookUI.h>

    @interface TestingViewController ()

    @end

    @implementation TestingViewController

    - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
    {
        self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
        if (self) {
            // Custom initialization
        }
        return self;
    }

    - (void)viewDidLoad
    {
        [super viewDidLoad];
        // Do any additional setup after loading the view.
        [self GetPBAccess];
    }
    - (void)didReceiveMemoryWarning
    {
        [super didReceiveMemoryWarning];
        // Dispose of any resources that can be recreated.
    }
    -(void)GetPBAccess
{
    ABAddressBookRef addressBook1 = ABAddressBookCreateWithOptions(NULL, NULL);
    switch (ABAddressBookGetAuthorizationStatus()) {
        case kABAuthorizationStatusNotDetermined:
        {
            ABAddressBookRequestAccessWithCompletion(addressBook1, ^(bool granted, CFErrorRef error) {
                if (granted) {
                    NSLog(@"Access Granted");
                    [self GetContacts];
                }
                else{
                    NSLog(@"Access Not Granted");
                }
            });
            break;
        }
        case kABAuthorizationStatusAuthorized:
        {
            NSLog(@"AUTHORIZATION ALREADY Granted");
            [self GetContacts];
            break;
        }
        case kABAuthorizationStatusDenied:
        {
            NSLog(@"AUTHORIZATION DENIED");
            break;
        }

        default:
            break;
    }
}


    -(IBAction)GetContacts
    {
        CFErrorRef error = NULL;

        ABAddressBookRef addressBook = ABAddressBookCreateWithOptions(NULL, &error);

        if (addressBook != nil)
        {
            NSLog(@"Succesful.");

            NSArray *allContacts = (__bridge_transfer NSArray *)ABAddressBookCopyArrayOfAllPeople(addressBook);

            NSUInteger i = 0;
            for (i = 0; i < [allContacts count]; i++)
            {
                //Person *person = [[Person alloc] init];

                ABRecordRef contactPerson = (__bridge ABRecordRef)allContacts[i];

                NSString *firstName = (__bridge_transfer NSString *)ABRecordCopyValue(contactPerson, kABPersonFirstNameProperty);
                NSString *lastName =  (__bridge_transfer NSString *)ABRecordCopyValue(contactPerson, kABPersonLastNameProperty);
                NSString *fullName = [NSString stringWithFormat:@"%@ %@", firstName, lastName];

                //            person.firstName = firstName;
                //            person.lastName = lastName;
                //            person.fullName = fullName;

                //email
                ABMultiValueRef emails = ABRecordCopyValue(contactPerson, kABPersonEmailProperty);

                //            NSUInteger j = 0;
                //            for (j = 0; j < ABMultiValueGetCount(emails); j++)
                //            {
                //                NSString *email = (__bridge_transfer NSString *)ABMultiValueCopyValueAtIndex(emails, j);
                //                if (j == 0)
                //                {
                //                    person.homeEmail = email;
                //                    NSLog(@"person.homeEmail = %@ ", person.homeEmail);
                //                }
                //
                //                else if (j==1)
                //                    person.workEmail = email;
                //            }
                //
                //            [self.tableData addObject:person];
            }
        }

        CFRelease(addressBook);
    }


    /*
    #pragma mark - Navigation

    // In a storyboard-based application, you will often want to do a little preparation before navigation
    - (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
    {
        // Get the new view controller using [segue destinationViewController].
        // Pass the selected object to the new view controller.
    }
    */

    @end

Answer 1

问题看起来是因为您调用了

    [self GetPBAccess];
    [self GetContacts];

直接内联。您应该做的是将GetContacts调用移到GetPBAccess中，这样一旦您知道您拥有访问权限，就会调用它(如果您没有访问权限，就不会调用它)。

目前，它将在用户授予访问权限之前运行，当然是在您第一次尝试它时，并且不返回任何信息。