NSArrayM insertObject:atIndex:]: object cannot be nil

Question

这里是下面的函数，我从函数中收集NSString值，如姓和名，并在其中分配数组

- (void)getPersonOutOfAddressBook
{

    ABAddressBookRef addressBook = ABAddressBookCreate();
if (addressBook != nil)
{
    NSLog(@"Succesful.");
    NSArray *allContacts = (__bridge_transfer NSArray *)ABAddressBookCopyArrayOfAllPeople(addressBook);
    NSUInteger i = 0;
    NSLog(@" Result :%d",[allContacts count]);
    for (i = 0; i < [allContacts count]; i++)
    {
        ABRecordRef contactPerson = (__bridge ABRecordRef)allContacts[i];

        NSString *firstName = (__bridge_transfer NSString *)ABRecordCopyValue(contactPerson, kABPersonFirstNameProperty);
        NSString *lastName =  (__bridge_transfer NSString *)ABRecordCopyValue(contactPerson, kABPersonLastNameProperty);

        NSMutableArray *name = [NSMutableArray array];
        [name addObject:firstName];
        [name addObject:lastName];

        [self displaynames:name];
        //NSLog(@"FirstNAme::::: LastNAME::::MobileNUMb::::EMail:::  %@ %@",firstName,lastName);
        ABMultiValueRef mobile=ABRecordCopyValue(contactPerson, kABPersonPhoneProperty);
        for (int k=0;k<ABMultiValueGetCount(mobile); k++)
        {
            NSString *mobileNo = (__bridge_transfer NSString *)ABMultiValueCopyValueAtIndex(mobile, k);
          //  NSLog(@"mobile number: %@",mobileNo);

        }
}
-(void)displaynames:(NSMutableArray*)names{
for(NSMutableArray* name in names){
    NSLog(@"MyResult:%@ %@",[names objectAtIndex:0],[names objectAtIndex:1]);
    messageToSend = [messageToSend stringByAppendingString:[names objectAtIndex:0]];
    messageToSend = [messageToSend stringByAppendingString:[names objectAtIndex:1]];
}
}

和发送数据

- (IBAction)sendContacts:(id)sender
{
NSData *textData = [self.messageToSend dataUsingEncoding:NSASCIIStringEncoding];
//send data to all connected devices
[self.session sendDataToAllPeers:textData withDataMode:GKSendDataReliable error:nil];
}

这里messageToSend是一个NSMutableString

所以在上面的代码中，我收集了所有的名字和姓氏，并将其放在数组中。当我在iphone上运行这个程序时，它显示错误[__NSArrayM insertObject:atIndex:]: object cannot be nil'

在NSLog(@"Myresult");之后，它显示了两次姓和名。所以谁能告诉我哪里我错了，同样的方式我如何收集电话号码。我必须在上面的代码中做些什么改变来避免这个错误，它只显示几个名字而不是全部。

它显示

2013-06-03 11:40:12.524 GetContacts[1173:1bb03] Succesful.
2013-06-03 11:40:12.539 getlist[1173:1bb03]  Result :2
2013-06-03 11:40:12.567 getlist[1173:1bb03] MyResult:john cena
2013-06-03 11:40:12.568 getlist[1173:1bb03] Successsssss::::::
2013-06-03 11:40:12.569 getlist[1173:1bb03] MyResult:john cena
2013-06-03 11:40:12.571 getlist[1173:1bb03] Successsssss::::::
2013-06-03 11:40:12.734 getlist[1173:1bb03] MyResult:peter john
2013-06-03 11:40:12.735 getlist[1173:1bb03] Successsssss::::::
2013-06-03 11:40:12.736 getlist[1173:1bb03] MyResult:peter john
2013-06-03 11:40:12.737 getlist[1173:1bb03] Successsssss::::::

Answer 1

首先检查你放入数组中的数据是否为nil，如果是就跳过它。

像这样:

if(firstName != nil)
    [yourMutableArray addObject:firstname];

你懂的

Answer 2

访问下面代码中使用的大部分内容

            CFStringRef firstName = ABRecordCopyValue(record , kABPersonFirstNameProperty);
            CFStringRef LastName = ABRecordCopyValue(record, kABPersonLastNameProperty);
            CFStringRef companyRef = ABRecordCopyValue(record, kABPersonOrganizationProperty);
            CFDateRef birthDate = ABRecordCopyValue(record, kABPersonBirthdayProperty);

            CFStringRef prefixName = ABRecordCopyValue(record , kABPersonPrefixProperty);
            CFStringRef phoneticFirstName = ABRecordCopyValue(record , kABPersonFirstNamePhoneticProperty);
            CFStringRef phoneticLastName = ABRecordCopyValue(record , kABPersonLastNamePhoneticProperty);
            CFStringRef middleName = ABRecordCopyValue(record , kABPersonMiddleNameProperty);
            CFStringRef suffixName = ABRecordCopyValue(record , kABPersonSuffixProperty);
            CFStringRef nickName = ABRecordCopyValue(record , kABPersonNicknameProperty);
            CFStringRef jobTitle = ABRecordCopyValue(record , kABPersonJobTitleProperty);
            CFStringRef department = ABRecordCopyValue(record , kABPersonDepartmentProperty);
            CFStringRef notes = ABRecordCopyValue(record , kABPersonNoteProperty);

            NSString *LastNameStr = (NSString *)LastName;
            NSString *firstNameStr = (NSString *)firstName;
            NSString *companyStr = (NSString *)companyRef;
            NSDate *birthDateValue = (NSDate *)birthDate;
            NSString *prefixNameStr = (NSString *)prefixName;
            NSString *phoneticFirstNameStr = (NSString *)phoneticFirstName;
            NSString *phoneticLastNameStr = (NSString *)phoneticLastName;
            NSString *middleNameStr = (NSString *)middleName;
            NSString *suffixNameStr = (NSString *)suffixName;
            NSString *nickNameStr = (NSString *)nickName;
            NSString *jobTitleStr = (NSString *)jobTitle;
            NSString *departmentStr = (NSString *)department;
            NSString *notesStr = (NSString *)notes;

Answer 3

如果你错推了某个视图控制器而不是另一个视图控制器，你会得到这个错误。对我来说. .

我的代码是…MainViewController *mainVC = [[UIStoryboard storyboardWithName:@"Main" bundle:nil]instantiateViewControllerWithIdentifier:@"mainView"];

[自我。

导航控制器presentViewController:mainVC animated:YES completion:nil

而不是....SWRevealViewController *mainVC = [[UIStoryboard storyboardWithName:@"Main" bundle:nil]instantiateViewControllerWithIdentifier:@"revealView"];

[自我。

导航控制器presentViewController:mainVC animated:YES completion:nil

确保你正在推送到正确的视图控制器。