如何在CNContactVCardSerialization中使用方法dataWithContacts? [英] How to use method dataWithContacts in CNContactVCardSerialization?
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问题描述
我正在尝试使用联系人的vCard表示形式获取NSData对象。我的代码:
I am trying get NSData object with the vCard representation of the contact. My code:
let contactStore = CNContactStore()
let fetchRequest = CNContactFetchRequest(keysToFetch: [CNContactGivenNameKey, CNContactFamilyNameKey])
var contacts = [CNContact]()
var vcard = NSData()
do{
try contactStore.enumerateContactsWithFetchRequest(fetchRequest) { (contact, status) -> Void in
self.fetchRequest.unifyResults = true
self.contacts.append(contact)}
} catch {
print("Error \(error)")
}
do {
try vcard = CNContactVCardSerialization.dataWithContacts(contacts)
} catch {
print("Error \(error)")
}
但是,我得到了错误:
将联系人写入vCard(数据)的异常:获取联系人时未请求属性。错误NilError。
Exception writing contacts to vCard (data): A property was not requested when contact was fetched. Error NilError.
我了解访问联系人的错误,但如何解决?
I understand that the error in the access to contacts, but how to fix it?
推荐答案
我找到了解决方案并且有效:
I found the solution and it work:
let contactStore = CNContactStore()
var contacts = [CNContact]()
var vcardFromContacts = NSData()
let fetchRequest = CNContactFetchRequest(keysToFetch:[CNContactVCardSerialization.descriptorForRequiredKeys()])
do{
try contactStore.enumerateContactsWithFetchRequest(fetchRequest, usingBlock: {
contact, cursor in
self.contacts.append(contact)})
} catch {
print("Get contacts \(error)")
}
// Returns the vCard representation of the specified contacts
do {
try vcardFromContacts = CNContactVCardSerialization.dataWithContacts(contacts)
} catch {
print("vcardFromContacts \(error)")
}
但是,我返回了电子名片数据中的联系人:
But, whet i returns the contacts from the vCard data:
do {
try contactsFromVcard = CNContactVCardSerialization.contactsWithData(vcardFromContacts)
} catch {
print("contactsFromVcard \(error)")
}
字段联系人imageData为零。虽然不是零。
field contact imageData has nil. Though it not nil.
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