如何获取一个联系人的生日——swift iOS 9

Question

我对 swift 和 iOS 比较陌生，在与联系人集成时遇到了一些问题。我使用了苹果的资源（https://developer.apple.com/library/prerelease/mac/documentation/Contacts/Reference/Contacts_Framework/index.html），但我不知道如何获取单个联系人的生日。我想取用户输入的名称并将匹配联系人的生日输出到标签。我正在使用let contacts = try store.unifiedContactsMatchingPredicate(CNContact.predicateForContactsMatchingName("\(fullnamefield.text!) \(lastnamefield.text!) \(suffixfield.text!)"), keysToFetch:[CNContactBirthdayKey])，但这会导致我无法理解的数组。

非常感谢您在使用新的联系人框架快速查找特定联系人的生日方面的帮助。

Answer 1

我相信这个数组的类型是[CNContact]。您需要遍历它并检索 birthday 属性，但如果您只找到一个联系人，您可以从数组中取出第一项并获取它的生日：

let store = CNContactStore()

//This line retrieves all contacts for the current name and gets the birthday and name properties
let contacts:[CNContact] = try store.unifiedContactsMatchingPredicate(CNContact.predicateForContactsMatchingName("\(fullnamefield.text!) \(lastnamefield.text!) \(suffixfield.text!)"), keysToFetch:[CNContactBirthdayKey, CNContactGivenNameKey])

//Get the first contact in the array of contacts (since you're only looking for 1 you don't need to loop through the contacts)
let contact = contacts[0]

//Check if the birthday field is set
if let bday = contact.birthday?.date as NSDate! {
    //Use the NSDateFormatter to convert their birthday (an NSDate) to a String
    let formatter = NSDateFormatter()
    formatter.timeZone = NSTimeZone(name: "UTC") // You must set the time zone from your default time zone to UTC +0, which is what birthdays in Contacts are set to.
    formatter.dateFormat = "dd/MM/yyyy" //Set the format of the date converter
    let stringDate = formatter.stringFromDate(contact.birthday!.date!)

    //Their birthday as a String:
    print(stringDate)
}