[英]Saving User a/c details from parse on device for offline use. Swift 3
我已经设置了解析和所有功能，可以根据需要完美地进行注册。 但是之后，我无法在设备上重新获取用户详细信息以供离线使用。
用户登录/注册后，我需要脱机使用那些对象。
类名： User
对象：
coverPhoto ： Image.png （另存为File）
profilePicture ： Image.png （另存为File）
usersUsername ：字符串
username / email ：字符串
firstName ：字符串
middleName ：字符串
lastName ：字符串
mobileNumber ：字符串
birthDate ：字符串
gender ：字符串
about ：字符串
我试图使用UserDefaults.standard.set(_variable name_, forKey: "String")来存储它UserDefaults.standard.set(_variable name_, forKey: "String")但是没有用。 ：\\
这就是我反复得到的。
这是我写的：
@IBAction func loginButtonPressed(_ sender: AnyObject) {
activityIndicator = UIActivityIndicatorView(frame: CGRect(x: 0, y: 0, width: 50, height: 50))
activityIndicator.center = self.view.center
activityIndicator.hidesWhenStopped = true
activityIndicator.activityIndicatorViewStyle = .gray
activityIndicator.layer.zPosition = 1
view.addSubview(activityIndicator)
activityIndicator.startAnimating()
UIApplication.shared.beginIgnoringInteractionEvents()
if email.text == "" || password.text == "" {
createAlert(title: "Error", message: "Please enter your username & password!")
self.activityIndicator.stopAnimating()
UIApplication.shared.endIgnoringInteractionEvents()
} else {
PFUser.logInWithUsername(inBackground: email.text!, password: password.text!, block: { (suser, error) in
if error != nil {
var displayErrorMessage = "Some Error Occured! Please Try Again Later!"
if let errorMessage = error as? NSError {
displayErrorMessage = errorMessage.userInfo["error"] as! String
}
self.createAlert(title: "Dang it!", message: displayErrorMessage)
self.activityIndicator.stopAnimating()
UIApplication.shared.endIgnoringInteractionEvents()
} else {
self.performSegue(withIdentifier: "toMainFunction", sender: nil)
let query = PFUser.query()
query?.findObjectsInBackground(block: { (objects, error) in
if error != nil {
print(error)
} else if let users = objects {
for object in users {
if let user = object as? PFUser {
if user.objectId != PFUser.current()?.objectId {
if let email = user.username {
UserDefaults.standard.set(email, forKey: "email")
}
if let coverFile = user["coverPhoto"] {
UserDefaults.standard.set(coverFile, forKey: "coverPhoto")
}
if let profileFile = user["profilePicture"] {
UserDefaults.standard.set(profileFile, forKey: "profilePicture")
}
if let firstName = user["firstName"] {
UserDefaults.standard.set(firstName, forKey: "firstName")
}
if let middleName = user["middleName"] {
UserDefaults.standard.set(middleName, forKey: "middleName")
}
if let lastName = user["lastName"] {
UserDefaults.standard.set(lastName, forKey: "lastName")
}
if let mobileNumber = user["mobileNumber"] {
UserDefaults.standard.set(mobileNumber, forKey: "mobileNumber")
}
if let birthday = user["BirthDate"] {
UserDefaults.standard.set(birthday, forKey: "BirthDate")
}
if let gender = user["gender"] {
UserDefaults.standard.set(gender, forKey: "gender")
}
if let aboutYou = user["about"] {
UserDefaults.standard.set(aboutYou, forKey: "about")
}
if let username = user["usersUsername"] {
UserDefaults.standard.set(username, forKey: "username")
}
gloFirstName = UserDefaults.standard.object(forKey: "firstName") as! String
gloMiddleName = UserDefaults.standard.object(forKey: "middleName") as! String
gloLastName = UserDefaults.standard.object(forKey: "lastName") as! String
gloMobNumber = UserDefaults.standard.object(forKey: "mobileNumber") as! String
gloEmail = UserDefaults.standard.object(forKey: "email") as! String
gloUName = UserDefaults.standard.object(forKey: "username") as! String
gloBirthDate = UserDefaults.standard.object(forKey: "BirthDate") as! String
gloGenderStr = UserDefaults.standard.object(forKey: "gender") as! String
gloAbout = UserDefaults.standard.object(forKey: "about") as! String
if let coverImageData = UserDefaults.standard.object(forKey: "coverPhoto"),
let coverPhoto = UIImage(data: coverImageData as! Data){
gloCoverImage = coverPhoto
}
if let profileImageData = UserDefaults.standard.object(forKey: "profilePicture"),
let profilePicture = UIImage(data: profileImageData as! Data){
gloProfilePicture = profilePicture
}
}
}
}
}
})
self.activityIndicator.stopAnimating()
UIApplication.shared.endIgnoringInteractionEvents()
}
})
}
}
我在这里束缚。
编辑：
编辑＃2：
突出显示的代码：
let query = PFUser.query()
query?.findObjectsInBackground(block: { (objects, error) in
if error != nil {
print(error)
} else if let users = objects {
for object in users {
if let user = object as? PFUser {
//-------------------------------------------------------------------------------------//
if user.objectId != PFUser.current()?.objectId {
if let email = user.username {
UserDefaults.standard.set(email, forKey: "email")
}
if let coverFile = user["coverPhoto"] {
UserDefaults.standard.set(coverFile, forKey: "coverPhoto")
}
if let profileFile = user["profilePicture"] {
UserDefaults.standard.set(profileFile, forKey: "profilePicture")
}
if let firstName = user["firstName"] {
UserDefaults.standard.set(firstName, forKey: "firstName")
}
if let middleName = user["middleName"] {
UserDefaults.standard.set(middleName, forKey: "middleName")
}
if let lastName = user["lastName"] {
UserDefaults.standard.set(lastName, forKey: "lastName")
}
if let mobileNumber = user["mobileNumber"] {
UserDefaults.standard.set(mobileNumber, forKey: "mobileNumber")
}
if let birthday = user["BirthDate"] {
UserDefaults.standard.set(birthday, forKey: "BirthDate")
}
if let gender = user["gender"] {
UserDefaults.standard.set(gender, forKey: "gender")
}
if let aboutYou = user["about"] {
UserDefaults.standard.set(aboutYou, forKey: "about")
}
if let username = user["usersUsername"] {
UserDefaults.standard.set(username, forKey: "username")
}
gloFirstName = UserDefaults.standard.object(forKey: "firstName") as! String
gloMiddleName = UserDefaults.standard.object(forKey: "middleName") as! String
gloLastName = UserDefaults.standard.object(forKey: "lastName") as! String
gloMobNumber = UserDefaults.standard.object(forKey: "mobileNumber") as! String
gloEmail = UserDefaults.standard.object(forKey: "email") as! String
gloUName = UserDefaults.standard.object(forKey: "username") as! String
gloBirthDate = UserDefaults.standard.object(forKey: "BirthDate") as! String
gloGenderStr = UserDefaults.standard.object(forKey: "gender") as! String
gloAbout = UserDefaults.standard.object(forKey: "about") as! String
if let coverImageData = UserDefaults.standard.object(forKey: "coverPhoto"),
let coverPhoto = UIImage(data: coverImageData as! Data){
gloCoverImage = coverPhoto
}
if let profileImageData = UserDefaults.standard.object(forKey: "profilePicture"),
let profilePicture = UIImage(data: profileImageData as! Data){
gloProfilePicture = profilePicture
}
}//-----------------------------------------------------------------------------//
}
}
}
})
没关系，解决了。 这个
if user.objectId != PFUser.current()?.objectId {
应该是这个
if user.objectId == PFUser.current()?.objectId {
因为我需要显示当前登录的帐户详细信息。
同样，图像也无法保存到UserDefaults 。 因此，只需在每次打开应用程序时加载它，并将其存储在var myVariableName = UIImage()再加上很少的if语句检查，就可以将其强制展开为： var myVariableName = UIImage()!
不管怎么说，还是要谢谢你！
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