在联系人框架中查找重复的联系人

Question

在Swift3中，我使用了新的Contact Framework来操作联系人，但是我没有任何解决方案来获取重复的联系人。

知道如何实现吗？

Answer 1

你可以这样做：

/// Find Duplicates Contacts In Given Contacts Array
func findDuplicateContacts(Contacts contacts : [CNContact], completionHandler : @escaping (_ result : [Array<CNContact>]) -> ()){
    let arrfullNames : [String?] = contacts.map{CNContactFormatter.string(from: [=10=], style: .fullName)}
    var contactGroupedByDuplicated : [Array<CNContact>] = [Array<CNContact>]()
    if let fullNames : [String] = arrfullNames as? [String]{
        let uniqueArray = Array(Set(fullNames))
        var contactGroupedByUnique = [Array<CNContact>]()
        for fullName in uniqueArray {
            let group = contacts.filter {
                CNContactFormatter.string(from: [=10=], style: .fullName) == fullName
            }
            contactGroupedByUnique.append(group)
        }
        for items in contactGroupedByUnique{
            if items.count > 1 {
                contactGroupedByDuplicated.append(items)
            }
        }
    }
    completionHandler(contactGroupedByDuplicated)
}

Answer 2

我会构建一个按名称键入的字典，然后过滤出那些出现不止一次的名称：

let keys = [CNContactIdentifierKey as CNKeyDescriptor, CNContactFormatter.descriptorForRequiredKeys(for: .fullName)]
let request = CNContactFetchRequest(keysToFetch: keys)
var contactsByName = [String: [CNContact]]()
try! self.store.enumerateContacts(with: request) { contact, stop in
    guard let name = CNContactFormatter.string(from: contact, style: .fullName) else { return }
    contactsByName[name] = (contactsByName[name] ?? []) + [contact]   // or in Swift 4, `contactsByName[name, default: []].append(contact)`
}
let duplicates = contactsByName.filter { .count > 1 }

在联系人框架中查找重复的联系人

Find duplicate contacts in Contacts Framework

contacts

ios

swift3