前言：
今天主要实现OAuth2.0登录和自定义的归档。用到的第三方和知识
1、指示器 SVProgressHUD
2、网络请求第三方Alamofire
3、OAuth2.0微博开放平台
4、自定义对象的归档和解档
首先看下实现的简单效果
2.gif
1、OAuth2.0授权的机制如下图
B227337D-6229-4AAC-86F8-36648494A562.png
实现步骤
1、加载授权页面（获取code）
2、通过code后期accessToken
3、通过accessToken去获取用户的信息
采用webView来加载授权页面
首先懒加载一个webView并遵守代理
//MARK:懒加载
lazy var webView:UIWebView = {
let webView = UIWebView()
webView.delegate = self
return webView
}()
定义一些常量
let ReBackURL:String = "https://api.weibo.com/oauth2/default.html" // 回调的URL
let AppKey:String = "2100191772" // 程序appkey
let AppSecret:String = "20701cb27e6279060eae21c1a7522f8c" // APPSecret
注意：这里需要成为新浪的开放者，并且新建自己的应用，才有上面的信息。我就不在这里详细描述了。微博开放平台
加载web view
let urlString = "https://api.weibo.com/oauth2/authorize?client_id=\(AppKey)&redirect_uri=\(ReBackURL)";
let url = NSURL(string: urlString)
let request = NSURLRequest(URL: url!)
webView.loadRequest(request)
获取和获取accessToken主要下下面的代理方法中实现,拦截URL
func webView(webView: UIWebView, shouldStartLoadWithRequest request: NSURLRequest, navigationType: UIWebViewNavigationType) -> Bool {
let urlString:String = request.URL!.absoluteString
if !urlString.hasPrefix(ReBackURL) {
//如果不是回调Url就继续加载
return true
}
// 判断是否授权成功
let parameterStr = "code="
if request.URL!.query!.hasPrefix(parameterStr) {
//授权成功,取出code的参数用于
print(request.URL!.query!)
let code = request.URL!.query!.substringFromIndex(parameterStr.endIndex)
// 获取accessToken
requestAccessToken(code)
}
else {
navigationController?.popViewControllerAnimated(true)
}
return false
}
获取accessToken的方法实现如下
private func requestAccessToken(code:String){
//
let accessTokenPath = "https://api.weibo.com/oauth2/access_token"
// 参数
let params = ["client_id":AppKey,"client_secret":AppSecret,"grant_type":"authorization_code","code":code,"redirect_uri":ReBackURL]
Alamofire.request(.POST, accessTokenPath, parameters: params, encoding: .URL, headers: nil).responseJSON { (response) in
print(response.request)
print(response.response)
print(response.data)
print(response.result)
if let json = response.result.value {
print("json\(json)")
let userAccount = YJUserAccount(dict: json as![String:AnyObject])
print(userAccount.access_token)
userAccount.loginSuccess = true
userAccount.savaAccount()
//获取accessToken成功，证明登录成功了
let base = YJBaseTabBarViewController()
base.selectedIndex = 1
UIApplication.sharedApplication().keyWindow?.rootViewController = base
SVProgressHUD.showInfoWithStatus("登录成功")
}
}
}
通过上一步的code，去换取accessToken，请求成功后返回JSON数据，我们自定义一个Model去解析，并保存到本地。
定义的模型YJUserAccount
class YJUserAccount: NSObject,NSCoding
要对自定义的对象实现归档和解档，需要遵守NSCoding协议并实现下面的两个方法
//MARK:NSCoding
func encodeWithCoder(aCoder: NSCoder) {
/* var access_token:String? // 令牌
var expires_in:NSNumber? // 过期时间戳
var uid: NSNumber? // 用户ID
var loginSuccess:Bool = false // 是否登录成功*/
aCoder.encodeObject(access_token, forKey: "access_token")
aCoder.encodeObject(expires_in, forKey: "expires_in")
aCoder.encodeObject(uid, forKey: "uid")
aCoder.encodeBool(loginSuccess, forKey: "loginSuccess")
}
required init?(coder aDecoder: NSCoder) {
access_token = aDecoder.decodeObjectForKey("access_token") as? String
expires_in = aDecoder.decodeObjectForKey("expires_in") as? NSNumber
uid = aDecoder.decodeObjectForKey("uid") as? NSNumber
loginSuccess = aDecoder.decodeBoolForKey("loginSuccess")
}
另外一注意一点就是字典转模型的，有些字没有，会出现崩溃的情况，可以改下下面的方法，就不会崩溃了。
//为了不让其崩溃，重写该
override func setValue(value: AnyObject?, forUndefinedKey key: String) {
}
归档和解档方法实现
// 归档
internal func savaAccount() {
let path = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true).last
if let savePath = path {
let archievePath = savePath.stringByAppendingString("/account.plist")
print(archievePath)
if NSKeyedArchiver.archiveRootObject(self, toFile: archievePath)
{
print("归档成功")
}
}
}
// 解档
internal class func loadAccount() -> YJUserAccount? {
let path = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true).last
let archievePath = path!.stringByAppendingString("/account.plist")
let userAccoutn = NSKeyedUnarchiver.unarchiveObjectWithFile(archievePath) as? YJUserAccount
return userAccoutn
}
上面就是简单的实现思路。
