ios swift模仿qq登陆界面，xml布局

给大家推荐两个学习的地址：

极客学院的视频：http://www.jikexueyuan.com/path/ios/

一个博客：http://blog.csdn.net/lizhongfu2013/article/details/29210015

主要想要实现一个模仿的登陆界面

代码：

//
//  LoginViewController.swift
//  IBM_LOGIN
//
//  Created by dcintern on 6/26/15.
//  Copyright (c) 2015 dcintern. All rights reserved.
//
 
//import Foundation
 
import UIKit
 
class LoginViewController: UIViewController
{
 
/// 定义属性
var QQNumber = UITextField()
var PassNumber = UITextField()
 
override func viewDidLoad() {
 
    self.view.backgroundColor = UIColor.whiteColor()
    super.viewDidLoad()
 
    // 添加头图片
    [self .addAllSubViews()];
}
 
// 添加所有子控件
func addAllSubViews(){
 
    /// 平铺背景
    var headImage = UIImageView(frame: CGRectMake(0,0, 400, 800))
    headImage.image =  UIImage(named:"123.jpeg")
    self.view.addSubview(headImage)
 
    /// QQ号输入提示，暂时没有用到
    var phoneText = UILabel(frame: CGRectMake(30, 240, UIScreen.mainScreen().bounds.size.width-60, 30))
    phoneText.text = ""
    self.view.addSubview(phoneText)
 
    /// QQ号输入框
    var QQNumber = UITextField(frame: CGRectMake(30, 150, UIScreen.mainScreen().bounds.size.width-60, 30))
    QQNumber.placeholder = " username"
    QQNumber.layer.borderWidth = 2
    QQNumber.layer.borderColor = UIColor.lightGrayColor().CGColor
    QQNumber.layer.cornerRadius = 5
    QQNumber.keyboardType = UIKeyboardType.NumberPad
    self.view.addSubview(QQNumber)
    self.QQNumber = QQNumber
 
    /// 密码输入提示，暂时没用到
    var passText = UILabel(frame: CGRectMake(30, 300, UIScreen.mainScreen().bounds.size.width-60, 30))
    passText.text = ""
    self.view.addSubview(passText)
 
    /// 密码输入框
    var PassNumber = UITextField(frame: CGRectMake(30, 200, UIScreen.mainScreen().bounds.size.width-60, 30))
    PassNumber.placeholder = " password"
    PassNumber.layer.borderWidth = 2
    PassNumber.layer.borderColor = UIColor.lightGrayColor().CGColor
    PassNumber.layer.cornerRadius = 5
    self.view.addSubview(PassNumber)
    self.PassNumber = PassNumber
 
    /// 密码找回
    var button = UIButton(frame: CGRectMake(200, 360, 120, 30))
    UIButton.buttonWithType(UIButtonType.Custom)
    button.setTitle("忘记密码", forState: UIControlState.Normal)
    button.setTitleColor(UIColor.lightGrayColor(), forState: UIControlState.Normal)
    self.view.addSubview(button)
    button.addTarget(self, action: "onClick", forControlEvents: UIControlEvents.TouchUpInside)
 
}
 
/// 密码找回方法实现
func onClick()
{
 
    ///找回密码提示
    UIAlertView(title: "温馨提示", message: "新密码已发送至手机上", delegate: nil, cancelButtonTitle: "确定", otherButtonTitles: "取消").show()
}
/**
点击界面键盘辞去第一响应者
*/
override func touchesBegan(touches: NSSet, withEvent event: UIEvent)
{
 
    self.QQNumber.resignFirstResponder()
    self.PassNumber.resignFirstResponder()
}
 
}

实现根据xml进行布局：

import UIkit
 
class LoginViewController :  UIViewController,NSXMLParserDelegate
 
{
 
        ///
 
        /// 定义属性
 
        var m_Username = UITextField()
 
        var m_Password = UITextField()
 
        var m_backgroundRect = CGRectMake(0,0,0,0)
 
        var m_UsernameRect = CGRectMake(0,0,0,0)
 
        var m_PassWordRect = CGRectMake(0,0,0,0)
 
        var m_ConnectRect = CGRectMake(0,0,0,0)
 
        var m_ForgetRect = CGRectMake(0,0,0,0)
 
        var myActivityIndicator: UIActivityIndicatorView!
 
        override func viewDidLoad()
 
        {
 
            self.view.backgroundColor = UIColor.whiteColor()
 
            super.viewDidLoad()
 
            var parser = NSXMLParser(contentsOfURL: NSURL(fileURLWithPath: NSBundle.mainBundle().pathForResource("LoginLayout", ofType: "xml")!))
 
            parser?.delegate = self
 
            parser?.parse()
 
            // 添加头图片
 
            [self .addAllSubViews()];
 
        }
 
        // 添加所有子控件
 
        func addAllSubViews()
 
        {
 
            /// 平铺背景
 
           // var headImage = UIImageView(frame: m_backgroundRect)
 
           // headImage.image =  UIImage(named:"background.jpg")
 
            //self.view.addSubview(headImage)
 
            //float lightblue[]={0.6824f, 0.7882f, 1.0f, 1.0f};
 
            //var color = CGColorCreate(CGColorSpaceCreateDeviceRGB(), myColor)
 
            ServerAddress.layer.borderColor = UIColor.blackColor().CGColor
 
            ServerAddress.layer.cornerRadius = 5
 
            self.view.addSubview(ServerAddress)
 
            self.m_ServerAddress = ServerAddress
 
            /// username input textbox
 
            var Username = UITextField(frame: m_UsernameRect)
 
            Username.placeholder = " username"
 
            Username.layer.borderWidth = 2
 
            Username.layer.borderColor = UIColor.blackColor().CGColor
 
            Username.layer.cornerRadius = 5
 
            self.view.addSubview(Username)
 
            self.m_Username = Username
 
            /// password input textbox
 
            var Password = UITextField(frame: m_PassWordRect)
 
            Password.placeholder = " password"
 
            Password.layer.borderWidth = 2
 
            Password.layer.borderColor = UIColor.blackColor().CGColor
 
            Password.layer.cornerRadius = 5
 
            self.view.addSubview(Password)
 
            self.m_Password = Password
 
            /// confirm the connection button
 
            var confirmbutton = UIButton(frame: m_ConnectRect)
 
            UIButton.buttonWithType(UIButtonType.Custom)
 
            confirmbutton.setTitle("Connect", forState: UIControlState.Normal)
 
            confirmbutton.setTitleColor(UIColor.blackColor(), forState: UIControlState.Normal)
 
            self.view.addSubview(confirmbutton)
 
            confirmbutton.addTarget(self, action: "onClickConfirm", forControlEvents: UIControlEvents.TouchUpInside)
 
            /// findback password button
 
            var button = UIButton(frame: m_ForgetRect)
 
            UIButton.buttonWithType(UIButtonType.Custom)
 
            button.setTitle("Forget password!", forState: UIControlState.Normal)
 
            button.setTitleColor(UIColor.lightGrayColor(), forState: UIControlState.Normal)
 
            self.view.addSubview(button)
 
            button.addTarget(self, action: "onClickFindPasswordBack", forControlEvents: UIControlEvents.TouchUpInside)
 
           // myActivityIndicator = UIActivityIndicatorView()
 
            //myActivityIndicator.activityIndicatorViewStyle = UIActivityIndicatorViewStyle.Gray
 
            //myActivityIndicator.center = self.view.center;
 
            myActivityIndicator = UIActivityIndicatorView(activityIndicatorStyle: .White)
 
            myActivityIndicator.frame = CGRectMake(self.view.frame.size.width/2 - 50, 250, 100, 100)
 
            myActivityIndicator.color = UIColor.blackColor()
 
            self.view.addSubview(myActivityIndicator);
 
        }
 
        ///on confirm connettion
 
        func onClickConfirm()
 
        {
 
        ///check if ip,username,passname is correct
 
           println(m_ServerAddress.text)
 
            //eares the space before and after
 
        }
 
        /// 密码找回方法实现
 
        func onClickFindPasswordBack()
 
        {
 
            ///找回密码提示, otherButtonTitles: "取消"这个参数如何传进去？
 
            UIAlertView(title: "温馨提示", message: "新密码已发送至手机上", delegate: nil, cancelButtonTitle: "确定").show()
 
        }
 
        /**
 
        点击界面键盘辞去第一响应者
 
        */
 
        override func touchesBegan(touches: NSSet, withEvent event: UIEvent)
 
        {
 
                      self.m_Username.resignFirstResponder()
 
            self.m_Password.resignFirstResponder()
 
        }
 
        var currentNodeName:String!
 
        func parser(parser: NSXMLParser, didStartElement elementName: String!, namespaceURI: String!, qualifiedName qName: String!, attributes attributeDict: [NSObject : AnyObject]!)
 
        {
 
            currentNodeName = elementName
 
            //review the code using swith
 
            if elementName == "background"
 
            {
 
                let x = CGFloat(((attributeDict["x"]! as String )as NSString).floatValue)
 
                let y = CGFloat(((attributeDict["y"]! as String ) as NSString).floatValue)
 
                let Width = CGFloat(((attributeDict["Width"]! as String )as NSString).floatValue)
 
                let Height = CGFloat(((attributeDict["Height"]! as String ) as NSString).floatValue)
 
                m_backgroundRect = CGRectMake(x,y,Width,Height)
 
            }
 
            else if(elementName == "ServerAddress")
 
            {
 
                let x = CGFloat(((attributeDict["x"]! as String )as NSString).floatValue)
 
                let y = CGFloat(((attributeDict["y"]! as String ) as NSString).floatValue)
 
                let Width = CGFloat(((attributeDict["Width"]! as String )as NSString).floatValue)
 
                let Height = CGFloat(((attributeDict["Height"]! as String ) as NSString).floatValue)
 
                m_ServerAddressRect = CGRectMake(x,y,Width,Height)
 
            }
 
            else if(elementName == "Username")
 
            {
 
                let x = CGFloat(((attributeDict["x"]! as String )as NSString).floatValue)
 
                let y = CGFloat(((attributeDict["y"]! as String ) as NSString).floatValue)
 
                let Width = CGFloat(((attributeDict["Width"]! as String )as NSString).floatValue)
 
                let Height = CGFloat(((attributeDict["Height"]! as String ) as NSString).floatValue)
 
                m_UsernameRect = CGRectMake(x,y,Width,Height)
 
            }
 
            else if(elementName == "Password")
 
            {
 
                let x = CGFloat(((attributeDict["x"]! as String )as NSString).floatValue)
 
                let y = CGFloat(((attributeDict["y"]! as String ) as NSString).floatValue)
 
                let Width = CGFloat(((attributeDict["Width"]! as String )as NSString).floatValue)
 
                let Height = CGFloat(((attributeDict["Height"]! as String ) as NSString).floatValue)
 
                m_PassWordRect = CGRectMake(x,y,Width,Height)
 
            }
 
            else if(elementName == "Connect")
 
            {
 
                let x = CGFloat(((attributeDict["x"]! as String )as NSString).floatValue)
 
                let y = CGFloat(((attributeDict["y"]! as String ) as NSString).floatValue)
 
                let Width = CGFloat(((attributeDict["Width"]! as String )as NSString).floatValue)
 
                let Height = CGFloat(((attributeDict["Height"]! as String ) as NSString).floatValue)
 
                m_ConnectRect = CGRectMake(x,y,Width,Height)
 
            }
 
            else if(elementName == "Forget")
 
            {
 
                let x = CGFloat(((attributeDict["x"]! as String )as NSString).floatValue)
 
                let y = CGFloat(((attributeDict["y"]! as String ) as NSString).floatValue)
 
                let Width = CGFloat(((attributeDict["Width"]! as String )as NSString).floatValue)
 
                let Height = CGFloat(((attributeDict["Height"]! as String ) as NSString).floatValue)
 
                m_ForgetRect = CGRectMake(x,y,Width,Height)
 
            }
 
        }
 
        func parser(parser: NSXMLParser, foundCharacters string: String!) {
 
            //        println(string)
 
            var str = string.stringByTrimmingCharactersInSet(NSCharacterSet.whitespaceAndNewlineCharacterSet())
 
            if str != ""{
 
                println("current node : \(currentNodeName),value : \(str)")
 
            }
 
        }
 
        override func didReceiveMemoryWarning() {
 
            super.didReceiveMemoryWarning()
 
            // Dispose of any resources that can be recreated.
 
        }
 
    lazy var m_connect: ConnectServer? = {
 
        return ConnectServer()
 
        }()
 
}

xml：

<LoginLayout>
    <background x="0" y="0" Width="400" Height="800">
        <Image name="background.jpg">  </Image>
    </background>
 
    <Username x="30" y="150" Width="300" Height="30">
    </Username>
    <Password x="30" y="200" Width="300" Height="30">
    </Password>
 
    <Connect x="30" y="250" Width="100" Height="30">
    </Connect>
 
    <Forget x="200" y="250" Width="200" Height="30">
    </Forget>
</LoginLayout>

对xml解析类的封装：

NSXMLParser(data: data)，这个有几种初始化的方法，但是string就不行，得转换成NSdata，还是比较蛋疼的

//
//  VMXMLParser.swift
//  XMLParserTest
//
//  Created by Jimmy Jose on 22/08/14.
//https://github.com/varshylmobile/VMXMLParser
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
 
import Foundation
 
// Todo: Add documentation
class VMXMLParser: NSObject,NSXMLParserDelegate{
 
    private let kParserError = "Parser Error"
    private var activeElement = ""
    private var previousElement = "-1"
    private var previousElementValue = ""
    private var arrayFinalXML = NSMutableArray()
    private var dictFinalXML  = NSMutableDictionary()
    private var completionHandler:((tags:NSArray?, error:String?)->Void)?
 
    var lameMode = true
 
    var reoccuringTag:NSString = ""
    var m_Projects:[String] = []
    /**
    Initializes a new parser with url of NSURL type.
 
    :param: url The url of xml file to be parsed
    :param: completionHandler The completion handler
 
    :returns: Void.
    */
 
    override init() {
 
        super.init()
 
    }
 
    func parseXMLFromURL(url:NSURL,takeChildOfTag:NSString,completionHandler:((tags:NSArray?, error:String?)->Void)? = nil){
 
        self.reoccuringTag = takeChildOfTag
        VMXMLParser().initWithURL(url, completionHandler: completionHandler)
 
    }
 
    func parseXMLFromURLString(urlString:NSString,takeChildOfTag:NSString,completionHandler:((tags:NSArray?, error:String?)->Void)? = nil){
        self.reoccuringTag = takeChildOfTag
 
        initWithURLString(urlString, completionHandler: completionHandler)
    }
 
    func parseXMLFromData(data:NSData,takeChildOfTag:NSString,completionHandler:((tags:NSArray?, error:String?)->Void)? = nil){
        self.reoccuringTag = takeChildOfTag
        initWithContentsOfData(data, completionHandler:completionHandler)
 
    }
 
    class func initParserWithURL(url:NSURL,completionHandler:((tags:NSArray?, error:String?)->Void)? = nil){
 
        VMXMLParser().initWithURL(url, completionHandler: completionHandler)
 
    }
 
    class func initParserWithURLString(urlString:NSString,completionHandler:((tags:NSArray?, error:String?)->Void)? = nil){
 
        VMXMLParser().initWithURLString(urlString, completionHandler: completionHandler)
    }
 
    class func initParserWithData(data:NSData,completionHandler:((tags:NSArray?, error:String?)->Void)? = nil){
 
        VMXMLParser().initWithContentsOfData(data, completionHandler:completionHandler)
 
    }
 
    private func initWithURL(url:NSURL,completionHandler:((tags:NSArray?, error:String?)->Void)? = nil) -> AnyObject {
 
        parseXMLForUrl(url :url, completionHandler: completionHandler)
 
        return self
 
    }
 
    private func initWithURLString(urlString :NSString,completionHandler:((tags:NSArray?, error:String?)->Void)? = nil) -> AnyObject {
 
        let url = NSURL(string: urlString as String)!
        parseXMLForUrl(url :url, completionHandler: completionHandler)
 
        return self
    }
 
    private func initWithContentsOfData(data:NSData,completionHandler:((tags:NSArray?, error:String?)->Void)? = nil) -> AnyObject {
 
        initParserWith(data: data)
 
        return self
 
    }
 
    private func parseXMLForUrl(#url:NSURL,completionHandler:((tags:NSArray?, error:String?)->Void)? = nil){
 
        self.completionHandler = completionHandler
 
        beginParsingXMLForUrl(url)
 
    }
 
    private func beginParsingXMLForUrl(url:NSURL){
 
        let request:NSURLRequest = NSURLRequest(URL:url)
 
        let queue:NSOperationQueue = NSOperationQueue()
 
        NSURLConnection.sendAsynchronousRequest(request,queue:queue,completionHandler:{response,data,error in
 
            if(error != nil){
                if(self.completionHandler != nil){
                    self.completionHandler?(tags:nil,error:error.localizedDescription)
                }
 
            }else{
 
                self.initParserWith(data: data)
 
            }})
    }
 
    private func initParserWith(#data:NSData){
 
        var parser = NSXMLParser(data: data)
        parser.delegate = self
 
        var success:Bool = parser.parse()
 
        if success {
 
            if(self.arrayFinalXML.count > 0)
            {
                if(self.completionHandler != nil)
                {
                    self.completionHandler?(tags:self.arrayFinalXML,error:nil)
                }
            }
 
        }
        else
        {
 
            if(self.completionHandler != nil)
            {
                self.completionHandler?(tags:nil,error:kParserError)
            }
        }
 
    }
 
    internal func parser(parser: NSXMLParser, didStartElement elementName: String, namespaceURI: String?, qualifiedName qName: String?, attributes attributeDict: [NSObject : AnyObject]) {
        activeElement = elementName;
        println(elementName)
        if elementName == "Project"
        {
            let name = (attributeDict["Name"]! as String )
            println(name)
            m_Projects.append(name)
 
        }
 
        if(reoccuringTag.isEqualToString(elementName)){
 
            dictFinalXML = NSMutableDictionary()
        }
    }
 
    internal func parser(parser: NSXMLParser, didEndElement elementName: String, namespaceURI: String?, qualifiedName qName: String?) {
 
        if(reoccuringTag.length == 0){
            if((dictFinalXML.objectForKey(activeElement)) != nil){
 
                arrayFinalXML.addObject(dictFinalXML)
                dictFinalXML = NSMutableDictionary()
 
            }else{
 
                dictFinalXML.setValue(previousElementValue, forKey: activeElement)
            }
        }else{
            //println(elementName)
            if(reoccuringTag.isEqualToString(elementName)){
 
                arrayFinalXML.addObject(dictFinalXML)
                dictFinalXML = NSMutableDictionary()
 
            }else{
 
                dictFinalXML.setValue(previousElementValue, forKey: activeElement)
 
            }
 
        }
 
        previousElement = "-1"
        previousElementValue = ""
 
    }
 
    internal func parser(parser: NSXMLParser, foundCharacters string: String?) {
 
        if var str = string as NSString? {
            str = str.stringByTrimmingCharactersInSet(NSCharacterSet.whitespaceAndNewlineCharacterSet())
 
            if((previousElement as NSString).isEqualToString("-1")){
 
                previousElement = activeElement
                previousElementValue = str as String
 
            }else{
 
                if((previousElement as NSString).isEqualToString(activeElement)){
 
                    previousElementValue = previousElementValue + (str as String)
 
                }else{
 
                    previousElement = activeElement
                    previousElementValue = str as String
                }
            }
        }
    }
 
    internal func parser(parser: NSXMLParser, parseErrorOccurred parseError: NSError) {
        if(self.completionHandler != nil){
            self.completionHandler?(tags:nil,error:parseError.localizedDescription)
        }
    }
 
}

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