新浪微博客户端(15)-保存用户名和密码-白红宇

新浪微博客户端(15)-保存用户名和密码

阅读量：5251 次

发布时间：2019-06-14

本文共 7568 字，大约阅读时间需要 25 分钟。

检测本地是否保存有用户的密码。如果有，则下次自动登录；如果没有，则提示用户登录。

DJAccount.h

#import 
     
      @interface DJAccount : NSObject/** 访问token */@property (nonatomic,copy) NSString *access_token;/** 过期时间，单位是秒 */@property (nonatomic,copy) NSNumber *expires_in;/** 当前user id */@property (nonatomic,copy) NSString *uid;/** 当前帐号创建时间 */@property (nonatomic,strong) NSDate *create_time;+ (instancetype)accountWithDictionary:(NSDictionary *)dict;@end

DJAccount.m

#import "DJAccount.h"@interface DJAccount() 
     
      @end@implementation DJAccount+ (instancetype)accountWithDictionary:(NSDictionary *)dict {    DJAccount *account = [[DJAccount alloc] init];        account.access_token = dict[@"access_token"];    account.expires_in = dict[@"expires_in"];    account.uid = dict[@"uid"];    account.create_time = [NSDate date];        return account;}- (void)encodeWithCoder:(NSCoder *)encoder {    [encoder encodeObject:self.access_token forKey:@"access_token"];    [encoder encodeObject:self.expires_in forKey:@"expires_in"];    [encoder encodeObject:self.uid forKey:@"uid"];    [encoder encodeObject:self.create_time forKey:@"create_time"];    }- (instancetype)initWithCoder:(NSCoder *)decoder {    if (self = [super init]) {        self.access_token = [decoder decodeObjectForKey:@"access_token"];        self.expires_in = [decoder decodeObjectForKey:@"expires_in"];        self.uid = [decoder decodeObjectForKey:@"uid"];        self.create_time = [decoder decodeObjectForKey:@"create_time"];    }    return self;}@end

DJAccountTool.h

#import 
     
      @class DJAccount;@interface DJAccountTool : NSObject+ (void)saveAccount:(DJAccount *)account;+ (DJAccount *)account;@end

DJAccountTool.m

#import "DJAccountTool.h"#import "DJAccount.h"#define DJAccountPath [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject] stringByAppendingPathComponent:@"account.archiver"]@implementation DJAccountTool+ (void)saveAccount:(DJAccount *)account {    [NSKeyedArchiver archiveRootObject:account toFile:DJAccountPath];    }+ (DJAccount *)account {            DJAccount *account = [NSKeyedUnarchiver unarchiveObjectWithFile:DJAccountPath];    // 判断当前帐号是否过期    long long expires_in = [account.expires_in longLongValue];    // 获得过期时间    NSDate *expires_time = [account.create_time dateByAddingTimeInterval:expires_in];    // 获得当前时间    NSDate *now_time = [NSDate date];    // 如果now大于expires_time,则代表过期    NSComparisonResult result = [expires_time compare:now_time];    if (result != NSOrderedDescending) {        return nil;    }    return account;}@end

UIWindow+Extension.m

#import "UIWindow+Extension.h"#import "DJMainViewController.h"#import "DJNewFeatureViewController.h"@implementation UIWindow (Extension)+ (void)switchRootViewController {    // 获取当前主窗口    UIWindow *window = [UIApplication sharedApplication].keyWindow;     NSString *versionKey = @"CFBundleVersion";    // 从Info.plist中读取当前软件版本号    NSString *currentVersion = [NSBundle mainBundle].infoDictionary[versionKey];    // 从沙盒中读取保存的历史版本号    NSString *lastVersion = [[NSUserDefaults standardUserDefaults] objectForKey:versionKey];        // 判断当前软件版本号是否与沙盒中保存的一致    if ([currentVersion isEqualToString:lastVersion]) { // 版本号一致        DJMainViewController *mainVc = [[DJMainViewController alloc] init];        window.rootViewController = mainVc;    } else { // 版本号不一致，显示新特性，并将当前软件版本号保存到沙盒        /* 1.显示新特性 */        DJNewFeatureViewController *newVc = [[DJNewFeatureViewController alloc] init];        window.rootViewController = newVc;        /* 2.将当前版本号写入到沙盒 */        [[NSUserDefaults standardUserDefaults] setValue:currentVersion forKey:versionKey];        // 立即将内存中的数据同步到沙盒        [[NSUserDefaults standardUserDefaults] synchronize];    }}@end

AppDelegate.m

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {                // 1. 创建窗口    self.window = [[UIWindow alloc] init];    self.window.frame = [UIScreen mainScreen].bounds;        // 2. 显示窗口    [self.window makeKeyAndVisible];    // 3. 判断当前帐户是否已经被授权来决定根控制器显示    DJAccount *account = [DJAccountTool account];    if (account) { // 之前已经成功授权        [UIWindow switchRootViewController];    } else { // 尚未成功授权       self.window.rootViewController = [[DJOAuthViewController alloc] init];    }        return YES;}

DJOAuthViewController.m

#import "DJOAuthViewController.h"#import "AFNetworking.h"#import "DJAccount.h"#import "DJAccountTool.h"#import "MBProgressHUD+MJ.h"@interface DJOAuthViewController () 
     
      @end@implementation DJOAuthViewController- (void)viewDidLoad {    [super viewDidLoad];        /* client_id&redirect_uri */    NSString *client_id = @"249054863";    NSString *redirect_uri = @"https://www.baidu.com";        UIWebView *webView = [[UIWebView alloc] init];    webView.frame = self.view.bounds;    webView.delegate = self;        [self.view addSubview:webView];        NSString *urlString = [NSString stringWithFormat:@"https://api.weibo.com/oauth2/authorize?client_id=%@&redirect_uri=%@",client_id,redirect_uri];        NSURL *url = [NSURL URLWithString:urlString];    NSURLRequest *urlRequest = [NSURLRequest requestWithURL:url];        [webView loadRequest:urlRequest];}- (void)didReceiveMemoryWarning {    [super didReceiveMemoryWarning];    // Dispose of any resources that can be recreated.}#pragma mark - webView 代理方法- (void)webViewDidStartLoad:(UIWebView *)webView {    [MBProgressHUD showMessage:@"加载中..."];}- (void)webViewDidFinishLoad:(UIWebView *)webView {    [MBProgressHUD hideHUD];}/** 此方法可用于拦截http请求 */- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType {    NSString *urlString = request.URL.absoluteString;    DJLog(@"current access url str : %@",urlString);    // 1. 判断当前地址是否是回调地址(https://www.baidu.com/?code=27a3d9fb9bbc5d3c20be9ae8e4331b02)    NSRange range= [urlString rangeOfString:@"code="];    if (range.length != 0) { // 是回调地址        // 2.截取code=后面的参数值        NSUInteger fromIndex = range.location + range.length;        NSString *code = [urlString substringFromIndex:fromIndex]; // code 就是授权成功的请求标记        // 3.使用授权成功的请求标记(code)来换取accessToken        [self getAccessTokenWithCode:code];        // 4.禁止加载回调地址        return NO;    }                return YES;}- (void)getAccessTokenWithCode:(NSString *)code {    // 1. 创建请求管理者    AFHTTPSessionManager *requestManager = [AFHTTPSessionManager manager];        // 2. 配置请求参数    NSString *urlString = @"https://api.weibo.com/oauth2/access_token"; // 请求授权的access_token URL    NSMutableDictionary *params = [NSMutableDictionary dictionary];    params[@"client_id"] = @"249054863";    params[@"client_secret"] = @"71d5b761bac9f377af3b938f6d89ba85";    params[@"grant_type"] = @"authorization_code";    params[@"code"] = code;    params[@"redirect_uri"] = @"https://www.baidu.com";        // 3. 发送请求    [requestManager POST:urlString parameters:params progress:nil success:^(NSURLSessionDataTask * _Nonnull task, NSDictionary *  _Nullable dict) {                [MBProgressHUD hideHUD];        // 1. 将返回的字典转换为模型        DJAccount *account = [DJAccount accountWithDictionary:dict];        // 2. 存储当前帐号信息        [DJAccountTool saveAccount:account];        // 3. 切换根控制器到DJMainViewController        [UIWindow switchRootViewController];                    } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {        [MBProgressHUD showError:@"授权失败"];         DJLog(@"failure responseObject: %@",error);    }];    }@end

最终效果：