我使用 Firebase 3.0 作为后端，我需要保存我的每一个user.uid在一个单独的子对象中，它需要是一个 NSArray，然后使用 for 循环检索该数组！
这就是我保存数据的方式：我为 FIRController 创建了一个单独的类，它负责处理数据库和存储的所有存储和检索。
func signUpUserWithBasicInfo(emailId : String! , password : String!, username : String!, age : String, gender : String!, backpackerType : String, info : [String : AnyObject], completionBlock : (() -> Void)){
print("fir signup did recieve")
FIRAuth.auth()?.createUserWithEmail(emailId, password: password, completion: {
user,error in
if error != nil{
print("error encountered while backend email signup Handshake : \(error)")
print("")
self.delegate.firShowAlert("Error signing you up", Message: "Please check your network or this email already exist!")
}else{
print("uploading database")
self.profilePictureUploading(info, completionBlock: {
FIRControllerClass.ref.child("UserProfile").child(user!.uid).setValue([
"username" : username,
"email" : emailId,
"age" : age,
"gender" : gender,
"password" : password,
"typeOfBackpacker" : backpackerType
])
completionBlock()
})
}
})
}
func profilePictureUploading(infoOnThePicture : [String : AnyObject],completionBlock : (()->Void)) {
if let referenceUrl = infoOnThePicture[UIImagePickerControllerReferenceURL] {
print(referenceUrl)
let assets = PHAsset.fetchAssetsWithALAssetURLs([referenceUrl as! NSURL], options: nil)
print(assets)
let asset = assets.firstObject
print(asset)
asset?.requestContentEditingInputWithOptions(nil, completionHandler: { (ContentEditingInput, infoOfThePicture) in
let imageFile = ContentEditingInput?.fullSizeImageURL
print("imagefile : \(imageFile)")
let filePath = FIRAuth.auth()!.currentUser!.uid + "/\(Int(NSDate.timeIntervalSinceReferenceDate() * 1000))/\(imageFile!.lastPathComponent!)"
print("filePath : \(filePath)")
FIRControllerClass.storageRef.child("ProfilePictures").child(filePath).putFile(imageFile!, metadata: nil, completion: { (metadata, error) in
if error != nil{
print("error in uploading image : \(error)")
self.delegate.firShowAlert("Error Uploading Your Profile Pic", Message: "Please check your network!")
}
else{
print("metadata in : \(metadata!)")
print(metadata?.downloadURL())
print("The pic has been uploaded")
print("download url : \(metadata?.downloadURL())")
self.uploadSuccess(metadata!, storagePath: filePath)
completionBlock()
}
})
})
} else {
print("No reference URL found!")
}
}
我如何在后端创建一个用作数组的子项，以及如何检索该数组？
我的 firebase JSON 结构：-
{
"UserId" : [ 1,
"Sq5EDvVOsQWkLylEx3GrBdEsIN92",
"xC4jCJmobUcqghq8C3SI1XT0UPk1",
"D8QmnOSH6vRYiMujKNXngzhdn992",
"riHjon6wknOmALwf0Z0Ri5aOMA82",
"fKqlb88MKsYCE43xy7D51qH6jqH3",
"aCgAFAGDIgWRSUu9a2aMo9HtnnD3",
"iicKACGo8RaeTSEggKPB0sU2Bme2",
"qJ2c8AcEYzVkJKLl13N92tyKnbz2"
],
"UserProfile" : {
"D8QmnOSH6vRYiMujKNXngzhdn992" : {
"age" : "12",
"email" : "[email protected] /cdn-cgi/l/email-protection",
"gender" : "f",
"password" : "123454321",
"typeOfBackpacker" : "dummy",
"username" : "duummyy1"
},
"Sq5EDvVOsQWkLylEx3GrBdEsIN92" : {
"age" : "121",
"email" : "[email protected] /cdn-cgi/l/email-protection",
"gender" : "gjhg",
"password" : "123454321",
"typeOfBackpacker" : "chef",
"username" : "hgfgh"
},
"aCgAFAGDIgWRSUu9a2aMo9HtnnD3" : {
"age" : "24",
"email" : "[email protected] /cdn-cgi/l/email-protection",
"gender" : "F",
"password" : "123454321",
"typeOfBackpacker" : "Group",
"username" : "Cathy"
},
etc
}
我还需要添加一个数组no of friends在我的数据库（数组）中。我使用 for 循环的唯一原因是，我可以使用我在数据库中创建的 userId 数组向我的用户（除了他/她自己）显示每个用户的详细信息，这实际上是我的每个用户数据库的父节点。
这就是我附加的方式UserId在我的数据库中：-
func retrieveUserIdsArray(completionBlock : ((appendedArr : NSMutableArray) -> Void)){
var appendedArray : NSMutableArray = []
FIRControllerClass.ref.child("UserId").observeEventType(FIRDataEventType.Value, withBlock: {(snapshot) in
if let userIdDetails = snapshot.value as? NSMutableArray{
userIdDetails.addObject((FIRAuth.auth()?.currentUser?.uid)!)
appendedArray = userIdDetails
completionBlock(appendedArr: appendedArray)
}
})
}
在此函数中调用它：-
func signUpUserWithBasicInfo(emailId : String! , password : String!, username : String!, age : String, gender : String!, backpackerType : String, info : [String : AnyObject], completionBlock : (() -> Void)){
print("fir signup did recieve")
FIRAuth.auth()?.createUserWithEmail(emailId, password: password, completion: {
user,error in
if error != nil{
print("error encountered while backend email signup Handshake : \(error)")
print("")
self.delegate.firShowAlert("Error signing you up", Message: "Please check your network or this email already exist!")
}else{
print("uploading database")
self.profilePictureUploading(info, completionBlock: {
FIRControllerClass.ref.child("UserProfile").child(user!.uid).setValue([
"username" : username,
"email" : emailId,
"age" : age,
"gender" : gender,
"password" : password,
"typeOfBackpacker" : backpackerType
])
var a = 0
self.retrieveUserIdsArray({ (appendedArr) in
a += 1
print("The appended array is : \(appendedArr)")
if a == 1{
FIRControllerClass.ref.child("UserId").setValue(appendedArr)
}else{
completionBlock()
}
})
})
}
})
}
我使用的原因a变量是为了解决它引起的无限循环（我知道它只是一个黑客，现在..）
欢迎任何更好的方法来解决这个问题！...
