在应用程序中，我正在从通讯录中获取联系人，并在更新联系人后将其存储在领域db。这是从通讯录中获取所有联系人的代码。
func getAllContactsFromAddressBook() {
do {
let contactsFetchRequest = CNContactFetchRequest(keysToFetch: [CNContactGivenNameKey as NSString,
CNContactFamilyNameKey as NSString,
CNContactImageDataKey as NSString,
CNContactImageDataAvailableKey as NSString,
CNContactPhoneNumbersKey as NSString,
CNContactEmailAddressesKey as NSString,
CNContactOrganizationNameKey as NSString,
CNContactJobTitleKey as NSString,
CNContactSocialProfilesKey as NSString ])
try store.enumerateContacts(with: contactsFetchRequest, usingBlock: { (cnContact, error) in
if cnContact.givenName == "", cnContact.familyName == "", cnContact.emailAddresses.count == 0 {
} else {
if realmStore.findContact(byId: cnContact.identifier) == nil {
let contact = Contact()
contact.id = cnContact.identifier
_ = realmStore.create(contact: contact)
}
if let contact = realmStore.findContact(byId: cnContact.identifier) {
do {
try realmStore.write {
contact.firstName = cnContact.givenName
contact.lastName = cnContact.familyName
contact.phoneNumber.removeAll()
contact.phoneNumber.append(objectsIn: cnContact.phoneNumbers.map({
let p = PhoneNumber()
p.phoneNumber = $0.value.stringValue
return p
}))
contact.email.removeAll()
contact.email.append(objectsIn: cnContact.emailAddresses.map({
let e = Email()
let email = $0.value as String
e.email = email == "" ? nil : email
return e
}))
contact.organization = cnContact.organizationName
contact.jobTitle = cnContact.jobTitle
contact.fromLinkedIn = cnContact.socialProfiles.filter({ $0.value.service == "LinkedIn" ? true : false }).first != nil ? true : false
if cnContact.imageDataAvailable == true {
contact.profileImageBlob = cnContact.imageData
}
}
contact.updatePriortyScore()
}
catch {
print("Couldn't update contact")
}
}
}
})
} catch {
print(error)
}
}
获取联系人的工作正常，但是每次加载视图时，它都会从地址簿中获取所有联系人列表，这会花费一些时间，因此有一种方法可以通知我特定的联系人（已更改的地址）或是否已更改新的联系人已添加到地址簿，以便可以更新领域列表。