iOS中获取通讯录信息

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在获取通讯录联系人相关信息时，要特别注意的是必须在获取前指定要获取的具体字段，另外，在添加到数组或字典中的联系人信息要注意提供默认值，防止数据为nil时崩溃。

指定要获取的数据：

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//姓：CNContactFamilyNameKey
//名：CNContactGivenNameKey
//手机号：CNContactPhoneNumbersKey
//邮箱：CNContactEmailAddressesKey
//备注：CNContactNoteKey
//公司名称：CNContactOrganizationNameKey
NSArray *keysToFetch = @[CNContactGivenNameKey, CNContactFamilyNameKey, CNContactPhoneNumbersKey,CNContactEmailAddressesKey,CNContactNoteKey,CNContactOrganizationNameKey];

CNContactFetchRequest *fetchRequest = [[CNContactFetchRequest alloc] initWithKeysToFetch:keysToFetch];

开始获取数据：

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NSMutableArray *contactBook = [NSMutableArray alloc] initWithCapacity:0]; 
CNContactStore *contactStore = [[CNContactStore alloc] init];

[contactStore enumerateContactsWithFetchRequest:fetchRequest error:nil usingBlock:^(CNContact * _Nonnull contact, BOOL * _Nonnull stop) {

    //姓名
    NSString *lastName = contact.givenName ? contact.givenName : @"";
    NSString *familyName = contact.familyName ? contact.familyName : @"";
    //手机号码
    NSString *mobile = @"";
    NSArray *phoneNumbers = contact.phoneNumbers;
    if (phoneNumbers.count) {
            CNLabeledValue *labelValue = phoneNumbers[0];
            CNPhoneNumber *phoneNumber = labelValue.value;
            
            NSString * string = phoneNumber.stringValue ;
            //去掉电话中的特殊字符
            string = [string stringByReplacingOccurrencesOfString:@"+86" withString:@""];
            string = [string stringByReplacingOccurrencesOfString:@"-" withString:@""];
            string = [string stringByReplacingOccurrencesOfString:@"(" withString:@""];
            string = [string stringByReplacingOccurrencesOfString:@")" withString:@""];
            string = [string stringByReplacingOccurrencesOfString:@" " withString:@""];
            string = [string stringByReplacingOccurrencesOfString:@" " withString:@""];
            mobile = string;
        }
        
        //邮箱
        NSString *email = @"";
        
        NSArray *emails = contact.emailAddresses;
        if (emails.count) {
            CNLabeledValue *emailValue = emails[0];
            NSString *emailAddress = [NSString stringWithFormat:@"%@",emailValue.value];
            email = emailAddress;
        }
        
        
        //备注
        NSString *note = contact.note ? contact.note : @"";
        //公司
        NSString *organization = contact.organizationName ? contact.organizationName : @"";
        
        NSDictionary *dic = @{@"email":email,
                             @"familyName":familyName,
                             @"lastName":lastName,
                             @"mobile":mobile,
                             @"notes":note,
                             @"organization":organization
                             };
        [contactBook addObject:dic];
        
    }];

contactBook就是获取到的通讯录数据。