我正在构建一个应用程序并在注册/登录时,它将通过用户地址簿,获取电话号码,检查用户类在Parse上的电话号码列,如果它们不是&#39 ; t朋友,然后添加它们。
我在AddressBookHelper.swift中有一个函数来帮助获取电话号码:
class AddressBookHelper: NSObject {
let addressBook = AFAddressBookManager()
static var addressBookData = AFAddressBookManager.allContactsFromAddressBook()
static var contactsArray = [String]()
static func getContacts() -> [String] {
var array = [String]()
for contact in addressBookData{
let phoneNumberArray = contact.numbers as! [String]
for number in phoneNumberArray{
array.append(number)
}
}
return array
}
}
然后在ParseHelper.swift中我再次检查Parse User类:
static func lookUpUserFromAddressBook(addressBook: [String], completionBlock: PFArrayResultBlock) {
for numbers in addressBook{
let query = User.query()
query!.whereKey("telephone", equalTo:numbers)
query!.findObjectsInBackgroundWithBlock(completionBlock)
}
}
最后,当点击按钮时,我将用户添加为朋友,如果还不是朋友的话:
@IBAction func importContacts(sender: AnyObject) {
ParseHelper.lookUpUserFromAddressBook(AddressBookHelper.getContacts()) {
(results: [AnyObject]?, error: NSError?) -> Void in
if error == nil {
if let objects = results as? [PFObject] {
for object in objects {
let userObject = object as! User
self.matchedUsers.append(userObject)
let query = PFQuery(className: "Friends")
query.includeKey("toUser")
query.whereKey("fromUser", equalTo: User.currentUser()!)
query.findObjectsInBackgroundWithBlock {
(objects: [AnyObject]?, error: NSError?) -> Void in
if error == nil {
if (objects!.count == 0) {
ParseHelper.addFollowRelationshipFromUser(fromUser: User.currentUser()!, toUser: userObject, completionBlock: { (success, error) -> Void in
if success{
self.performSegueWithIdentifier("skipped", sender: self)
}
else{
print("Error: \(error!) \(error!.userInfo)")
}
})
}
else{
self.performSegueWithIdentifier("skipped", sender: self)
}
} else {
print("Error: \(error) \(error!.userInfo)")
}
}
}
}
}
else {
print("Error: \(error!) \(error!.userInfo)")
}
}
}
我这样做是对的吗?它有效,但代码似乎有点长。有更简单的方法吗?
提前致谢
答案 0 :(得分:1)
你应该看看PFQuery的whereKey:containedIn:
。这将返回所有用户的列表,这些用户的电话号码与您在阵列中传递的任何号码相匹配。这将大大减少您检索用户联系人所需的查询次数。
// Find users with any of these phone numbers
let numbers = ["1234567890", "1111111111", "222222222"]
query.whereKey("phoneNumber", containedIn: numbers)
来自Parse iOS开发者指南: https://parse.com/docs/ios/guide#queries
如果要检索与多个不同值匹配的对象,则为您 可以使用whereKey:containedIn :,提供一个可接受的数组 值。这对于用单个查询替换多个查询通常很有用 查询。
您还可以使用PFObject.saveAllInBackground()在一个查询中创建所有关注关系,这需要保存PFObject数组。