所以我已经从我的数据库创建了一个数组或所有信息，并将其设置为包含单个较小字符串的大字符串。我想创建一个基本上验证它的语句，并说如果字符串在字符串字符串内，则弹出警报。我似乎无法创建一个正确的声明。
下面是我创建大字符串的代码，名为userInfo
//
// ViewController.swift
// WagerMe
//
// Created by Christopher calvert on 3/1/17.
// Copyright © 2017 Christopher calvert. All rights reserved.
// CODED BY CHRIS CALVERT
import UIKit
class ViewController: UIViewController {
var userInfo = [[String]]()
@IBOutlet weak var fullname: UITextField!
@IBOutlet weak var userAge: UITextField!
@IBOutlet weak var userUsername: UITextField!
@IBOutlet weak var userEmail: UITextField!
@IBOutlet weak var userPassword: UITextField!
@IBAction func register(_ sender: Any) {
let stuff = userInfo
if(fullname.text!.isEmpty || userAge.text!.isEmpty || userUsername.text!.isEmpty || userEmail.text!.isEmpty || userPassword.text!.isEmpty) {
let myAlert = UIAlertController(title: "Alert", message: "All fields are required to register.", preferredStyle: UIAlertControllerStyle.alert);
let okAction = UIAlertAction(title: "OK", style: UIAlertActionStyle.default, handler:nil)
myAlert.addAction(okAction);
self.present(myAlert, animated: true, completion: nil)
return;
}
func validateAlpha(field: [String]) -> Bool {
let alphanumericChars = NSCharacterSet(charactersIn: "!@#$%^&*()-_=+1234567890.,")
var result = false
for x in field {
if (x.rangeOfCharacter(from: alphanumericChars as CharacterSet) != nil) {
result = true
}
else {
result = false
}
}
return result
}
func validateAge(field: [String]) -> Bool {
let alphanumericChars = NSCharacterSet(charactersIn: "!@#$%^&*()-_=+.,abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ")
var result = false
for x in field {
if (x.rangeOfCharacter(from: alphanumericChars as CharacterSet) != nil) {
result = true
}
else {
result = false
}
}
return result
}
func validateEmail(field: [String]) -> Bool {
let alphanumericChars = NSCharacterSet(charactersIn: "!#$%^&*()-_=+,")
var result = false
for x in field {
if (x.rangeOfCharacter(from: alphanumericChars as CharacterSet) != nil) {
result = true
}
else {
result = false
}
}
return result
}
func validate(field: [String]) -> Bool {
let alphanumericChars = NSCharacterSet(charactersIn: "!@#$%^&*()-_=+")
var result = false
for x in field {
if (x.rangeOfCharacter(from: alphanumericChars as CharacterSet) != nil) {
result = true
}
else {
result = false
}
}
return result
}
if validateAlpha(field: [fullname.text!]) {
let validateName = UIAlertController(title: "Alert", message: "You have entered invalid characters in the 'Name' field", preferredStyle: UIAlertControllerStyle.alert)
validateName.addAction(UIAlertAction(title: "Ok", style: UIAlertActionStyle.default, handler: nil))
self.present(validateName, animated: true, completion: nil)
} else if validateAge(field: [userAge.text!]) {
let validateAge = UIAlertController(title: "Alert", message: "You have entered non-numbers in the 'Age' field", preferredStyle: UIAlertControllerStyle.alert)
validateAge.addAction(UIAlertAction(title: "Ok", style: UIAlertActionStyle.default, handler: nil))
self.present(validateAge, animated: true, completion: nil)
} else if validate(field: [userUsername.text!]) {
let validateUsername = UIAlertController(title: "Alert", message: "You have entered invalid characters in the 'Username' field", preferredStyle: UIAlertControllerStyle.alert)
validateUsername.addAction(UIAlertAction(title: "Ok", style: UIAlertActionStyle.default, handler: nil))
self.present(validateUsername, animated: true, completion: nil)
} else if validateEmail(field: [userEmail.text!]) {
let validateEmail = UIAlertController(title: "Alert", message: "You have entered invalid characters in the 'Email' field", preferredStyle: UIAlertControllerStyle.alert)
validateEmail.addAction(UIAlertAction(title: "Ok", style: UIAlertActionStyle.default, handler: nil))
self.present(validateEmail, animated: true, completion: nil)
} else if validate(field: [userPassword.text!]) {
let validatePassword = UIAlertController(title: "Alert", message: "You have entered invalid characters in your password.", preferredStyle: UIAlertControllerStyle.alert)
validatePassword.addAction(UIAlertAction(title: "Ok", style: UIAlertActionStyle.default, handler: nil))
self.present(validatePassword, animated: true, completion: nil)
} else if (fullname.text?.characters.count)! > 31 {
let nameTooLong = UIAlertController(title: "Alert", message: "Your name must be less than 30 characters.", preferredStyle: UIAlertControllerStyle.alert)
nameTooLong.addAction(UIAlertAction(title: "Ok", style: UIAlertActionStyle.default, handler: nil))
self.present(nameTooLong, animated: true, completion: nil)
} else if (fullname.text?.characters.count)! < 5 {
let nameTooShort = UIAlertController(title: "Alert", message: "Your name must be greater than 4 characters.", preferredStyle: UIAlertControllerStyle.alert)
nameTooShort.addAction(UIAlertAction(title: "Ok", style: UIAlertActionStyle.default, handler: nil))
self.present(nameTooShort, animated: true, completion: nil)
} else if (userPassword.text?.characters.count)! < 5 {
let passwordTooShort = UIAlertController(title: "Alert", message: "Your password must be greater than 4 characters.", preferredStyle: UIAlertControllerStyle.alert)
passwordTooShort.addAction(UIAlertAction(title: "Ok", style: UIAlertActionStyle.default, handler: nil))
self.present(passwordTooShort, animated: true, completion: nil)
} else if (userPassword.text?.characters.count)! > 19 {
let passwordTooLong = UIAlertController(title: "Alert", message: "Your password must be less than 18 characters.", preferredStyle: UIAlertControllerStyle.alert)
passwordTooLong.addAction(UIAlertAction(title: "Ok", style: UIAlertActionStyle.default, handler: nil))
self.present(passwordTooLong, animated: true, completion: nil)
} else if (userAge.text?.characters.count)! < 2 {
let passwordTooLong = UIAlertController(title: "Alert", message: "Sorry! You're not old enough to register for WagerMe.", preferredStyle: UIAlertControllerStyle.alert)
passwordTooLong.addAction(UIAlertAction(title: "Ok", style: UIAlertActionStyle.default, handler: nil))
self.present(passwordTooLong, animated: true, completion: nil)
} else if (userUsername.text?.characters.count)! > 21 {
let usernameTooLong = UIAlertController(title: "Alert", message: "Your username must be less than 20 characters.", preferredStyle: UIAlertControllerStyle.alert)
usernameTooLong.addAction(UIAlertAction(title: "Ok", style: UIAlertActionStyle.default, handler: nil))
self.present(usernameTooLong, animated: true, completion: nil)
} else if (userUsername.text?.characters.count)! < 5 {
let usernameTooShort = UIAlertController(title: "Alert", message: "Your username must be greater than 4 characters.", preferredStyle: UIAlertControllerStyle.alert)
usernameTooShort.addAction(UIAlertAction(title: "Ok", style: UIAlertActionStyle.default, handler: nil))
self.present(usernameTooShort, animated: true, completion: nil)
} else {
let request = NSMutableURLRequest(url: NSURL(string: "http://cgi.soic.indiana.edu/~team10/store.php")! as URL)
request.httpMethod = "POST"
let postString = "a=\(fullname.text!)&b=\(userAge.text!)&c=\(userUsername.text!)&d=\(userEmail.text!)&e=\(userPassword.text!)"
request.httpBody = postString.data(using: String.Encoding.utf8)
let task = URLSession.shared.dataTask(with: request as URLRequest) {
data, response, error in
if error != nil {
print("error=\(String(describing: error))")
return
}
print("response = \(String(describing: response))")
let responseString = NSString(data: data!, encoding: String.Encoding.utf8.rawValue)
print("responseString = \(String(describing: responseString))")
}
task.resume()
}
//Alert for successful registration
let alertController = UIAlertController(title: "User", message: "User successfully registered!", preferredStyle: UIAlertControllerStyle.alert)
alertController.addAction(UIAlertAction(title: "OK", style: UIAlertActionStyle.default, handler: nil))
self.present(alertController, animated: true, completion: nil)
fullname.text = ""
userAge.text = ""
userEmail.text = ""
userUsername.text = ""
userPassword.text = ""
}
override func viewDidLoad() {
super.viewDidLoad()
let url = URL(string:"http://cgi.soic.indiana.edu/~team10/pullUsers.php")
do {
let userdata = try Data(contentsOf: url!)
let users = try JSONSerialization.jsonObject(with: userdata, options: JSONSerialization.ReadingOptions.allowFragments) as! [String:AnyObject]
if let jsonarray = users["users"] as? NSArray{
for index in 0...jsonarray.count-1{
var array = [String]()
let object = jsonarray[index] as! [String : AnyObject]
let username = object["username"] as! String
let email = object["email"] as! String
array.append(username)
array.append(email)
userInfo.append(array)
}
}
}
catch{
}
print(userInfo)
//Looks for single or multiple taps.
let tap: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(LoginViewController.dismissKeyboard))
//Uncomment the line below if you want the tap not not interfere and cancel other interactions.
//tap.cancelsTouchesInView = false
view.addGestureRecognizer(tap)
// Do any additional setup after loading the view, typically from a nib.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
//Calls this function when the tap is recognized.
func dismissKeyboard() {
//Causes the view (or one of its embedded text fields) to resign the first responder status.
view.endEditing(true)
}
}
我创建数组并将其设置为ViewDidLoad
中的字符串字符串答案 0 :(得分：0)
在调查代码后，我建议您创建代表用户的struct。
这是因为收到的回复：
http://cgi.soic.indiana.edu/~team10/pullUsers.php
那是：
{ “用户”：[{ “用户名”： “sspoulos”， “电子邮件”： “sspoulos@yahoo.com”}，{ “用户名”： “ctcalver”， “电子邮件”：“ctcalver@indiana.edu “}，{” 用户名 “：” zjhabib “ ”电子邮件“： ”zjhabib@indiana.edu“}，{ ”用户名“： ”aukmoore“， ”电子邮件“： ”aukmoore@indiana.edu“}，{” 用户名“：” 测试仪”， “电子邮件”： “测试仪”}，{ “用户名”： “奥斯汀”， “电子邮件”： “电子邮件”}，{ “用户名”： “赞恩”， “电子邮件”： “赞恩”} { “用户名”： “kbryant”， “电子邮件”： “kbryant@indiana.edu”}，{ “用户名”： “rartest”， “电子邮件”： “rartest@indiana.edu”}，{ “用户名”： “assman”， “电子邮件”： “assman@yahoo.com”}，{ “用户名”： “tromo”， “电子邮件”： “tromo@indiana.edu”}，{ “用户名”： “emanning”，“电子邮件“：” emanning@indiana.edu “}，{” 用户名 “：” steventest”， “电子邮件”： “steventest”}，{ “用户名”： “hsimpson”， “电子邮件”： “hsimpson@indiana.edu”} { “用户名”： “pgriffin”， “电子邮件”： “pgriffin@indiana.edu”}，{ “用户名”： “abelinc”， “电子邮件”： “abelinc@indiana.edu”}，{ “用户名”： “akmoore”， “电子邮件”： “akmoore20@indiana.edu”}]}
示例：
struct User {
let username: String
let email: String
}
在此之后，您将创建User数组而不是巨大的字符串。这将为您提供验证的机会，以您希望的方式过滤数据并使用清晰的语法。
如果用户在数组中的验证示例：
let users = [User(name: "sspoulos", email: "sspoulos@yahoo.com"),User(name: "ctcalver", email: "ctcalver@indiana.edu"),User(name: "zjhabib", email: "zjhabib@indiana.edu"),User(name: "aukmoore", email: "aukmoore@indiana.edu")]
let result = users.contains{$0.name == "sspoulos"}
通过这种方式，您将了解用户是否出现在数组中，如果没有显示警报。