五、iOS第三方授权登录

废话不多说，直接上干货！

第一步：不管是QQ登录还是微信登录，先让产品同事去开放平台申请APP ID和APP密钥；

第二步：下载SDK
1、QQ登录(只能从开放平台下载SDK)
http://wiki.open.qq.com/wiki/mobile/SDK%E4%B8%8B%E8%BD%BD
2、微信登录(可以从开放平台下载SDK，也可以通过cocoapods下载安装)
2.1、直接从开放平台下载SDK
https://open.weixin.qq.com/cgi-bin/showdocument?action=dir_list&t=resource/res_list&verify=1&id=open1419319164&lang=zh_CN
2.2、在Podfile中添加：pod ‘WechatOpenSDK’

第三步：添加头文件
#import
#import
#import
#import
添加依赖库 SystemConfiguration.framework

第四步：开始写ThirdLogin封装(以下封装主要是实现登录和获取用户信息)

@interface LCThirdLogin : NSObject


@property (nonatomic, copy) void (^QQOpenID)(NSString *qqOpenId);
@property (nonatomic, copy) void (^WXOpenID)(NSString *wxOpenId);
@property (nonatomic, copy) void (^QQUserInfo)(NSDictionary *qqUserInfo);
@property (nonatomic, copy) void (^WXUserInfo)(NSDictionary *wxUserInfo);

// 获取模块单例
+ (instancetype)shareInstance;

#pragma mark - QQ登录

// 拉起QQ登录UI
- (void)qqLogin;

#pragma mark - 微信登录

// 注册微信登录
- (void)wxLoginRegister;
// 拉起微信登录UI
- (void)wxLogin;

@end

#import "LCThirdLogin.h"

@interface LCThirdLogin ()

@property (nonatomic, strong) TencentOAuth *tencentOAuth;

@end

@implementation LCThirdLogin

// 获取模块单例
+ (instancetype)shareInstance {
    
    static id instance = nil;
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        instance = [[LCThirdLogin alloc] init];
    });
    
    return instance;
}

#pragma mark - QQ登录

// 拉起QQ登录UI
- (void)qqLogin {
    
    self.tencentOAuth = [[TencentOAuth alloc] initWithAppId:QQLOGIN_APPID andDelegate:self];
    NSArray *permissions = @[/** 获取用户信息 */
                             kOPEN_PERMISSION_GET_USER_INFO,
                             /** 移动端获取用户信息 */
                             kOPEN_PERMISSION_GET_SIMPLE_USER_INFO,
                             /** 获取会员用户基本信息 */
                             kOPEN_PERMISSION_GET_VIP_INFO,
                             /** 获取会员用户详细信息 */
                             kOPEN_PERMISSION_GET_VIP_RICH_INFO,
                             /** 获取登录用户自己的详细信息 */
                             kOPEN_PERMISSION_GET_INFO,
                             /** 获取其他用户的详细信息 */
                             kOPEN_PERMISSION_GET_OTHER_INFO,
                             /** 验证是否认证空间粉丝 */
                             kOPEN_PERMISSION_CHECK_PAGE_FANS];
    [self.tencentOAuth authorize:permissions];
}

// 登录成功回调
- (void)tencentDidLogin {

    if (self.tencentOAuth.accessToken && self.tencentOAuth.accessToken.length > 0) {
        if (self.QQOpenID) {
            self.QQOpenID(self.tencentOAuth.openId);
        }
        // 获取用户信息
        [self.tencentOAuth getUserInfo];
    }
}

// 非⽹络错误导致登录失败
- (void)tencentDidNotLogin:(BOOL)cancelled {
    
    if (cancelled) {
        // 用户取消登录
    } else {
        // 登录失败
    }
}

// ⽹络错误导致登录失败
- (void)tencentDidNotNetWork {
}

// 获取用户信息成功
- (void)getUserInfoResponse:(APIResponse *)response {

    if (self.QQUserInfo) {
        self.QQUserInfo(response.jsonResponse);
    }
}

- (void)onReq:(QQBaseReq *)req {
}

- (void)isOnlineResponse:(NSDictionary *)response {
}

#pragma mark - 微信登录

// 注册微信登录
- (void)wxLoginRegister {
    
    [WXApi registerApp:WXLOGIN_APPID];
}

// 拉起微信登录UI
- (void)wxLogin {
    
    if ([WXApi isWXAppInstalled]) {
        // 构造SendAuthReq结构体
        SendAuthReq *req = [[SendAuthReq alloc] init];
        req.scope = @"snsapi_userinfo";
        req.state = @"LCRACMVVMRouter";
        // 第三方向微信终端发送一个SendAuthReq消息结构
        [WXApi sendReq:req];
    } else {
        NSLog(@"您的设备未安装微信");
    }
}

// 授权回调
- (void)onResp:(BaseResp *)resp {
    
    // 判断是否为授权请求，否则与微信支付等功能发生冲突
    if([resp isKindOfClass:[SendAuthResp class]]) {
        SendAuthResp *authResp = (SendAuthResp *)resp;
        if (![authResp.state isEqualToString:@"LCRACMVVMRouter"]) {
            NSLog(@"微信授权失败");
            return;
        }
        switch (authResp.errCode) {
            case WXSuccess:
                [[LCThirdLogin shareInstance] getWeixinOpenId:authResp.code];
                break;
            case WXErrCodeUserCancel:
                NSLog(@"微信授权取消");
                break;
            default:
                NSLog(@"微信授权失败");
                break;
        }
    }
}

// 获取微信访问令牌
- (void)getWeixinOpenId:(NSString *)code {
    
    NSString *url = [NSString stringWithFormat:@"https://api.weixin.qq.com/sns/oauth2/access_token?appid=%@&secret=%@&code=%@&grant_type=authorization_code", WXLOGIN_APPID, WXLOGIN_APPSERECET, code];
    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
        NSURL *zoneUrl = [NSURL URLWithString:url];
        NSString *zoneStr = [NSString stringWithContentsOfURL:zoneUrl encoding:NSUTF8StringEncoding error:nil];
        NSData *data = [zoneStr dataUsingEncoding:NSUTF8StringEncoding];
        dispatch_async(dispatch_get_main_queue(), ^{
            if (data){
                NSDictionary *dic = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:nil];
                if (self.WXOpenID) {
                    self.WXOpenID(dic[@"openid"]);
                }
                // 获取用户信息
                [self requestUserInfoByToken:dic[@"access_token"] andOpenid:dic[@"openid"]];
            }
        });
    });
}

// 通过令牌请求微信用户信息
- (void)requestUserInfoByToken:(NSString *)token andOpenid:(NSString *)openID {
    
    NSString *url = [NSString stringWithFormat:@"https://api.weixin.qq.com/sns/userinfo?access_token=%@&openid=%@", token, openID];
    AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
    manager.requestSerializer = [AFJSONRequestSerializer serializer];
    manager.responseSerializer = [AFHTTPResponseSerializer serializer];
    [manager GET:url parameters:nil progress:^(NSProgress * _Nonnull downloadProgress) {
    } success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {
        NSDictionary *dic = [NSJSONSerialization JSONObjectWithData:responseObject options:NSJSONReadingMutableContainers error:nil];
        if (self.WXUserInfo) {
            self.WXUserInfo(dic);
        }
    } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
        NSLog(@"%@", error.description);
    }];
}

@end

第五步：调用
QQ登录

[[LCThirdLogin shareInstance] qqLogin];
[[LCThirdLogin shareInstance] setQQOpenID:^(NSString * _Nonnull qqOpenId) {
    NSLog(@"%@", qqOpenId);
}];
[[LCThirdLogin shareInstance] setQQUserInfo:^(NSDictionary * _Nonnull qqUserInfo) {
    NSLog(@"%@", qqUserInfo);
}];

微信登录

[[LCThirdLogin shareInstance] wxLogin];
[[LCThirdLogin shareInstance] setWXOpenID:^(NSString * _Nonnull wxOpenId) {
    NSLog(@"%@", wxOpenId);
}];
[[LCThirdLogin shareInstance] setWXUserInfo:^(NSDictionary * _Nonnull wxUserInfo) {
    NSLog(@"%@", wxUserInfo);
}];

第六步：做到这里很多人都觉得完成了，可是为什么还是调不起来呢？
别急，程序媛姐姐告诉你，还有几个非常重要的配置需要去做！


完成了上述设置之外，QQ登录已经能够拉起网页登录模式了，但是微信还是拉不起页面，原因是我们还需要设置白名单，修改plist文件

LSApplicationQueriesSchemes
    
        
        wechat
        weixin
        
        mqq
        mqqapi
        mqqwpa
        mqqbrowser
        mttbrowser
        mqqOpensdkSSoLogin
        mqqopensdkapiV2
        mqqopensdkapiV3
        mqqopensdkapiV4
        wtloginmqq2
        mqzone
        mqzoneopensdk
        mqzoneopensdkapi
        mqzoneopensdkapi19
        mqzoneopensdkapiV2
        mqqapiwallet
        mqqopensdkfriend
        mqqopensdkdataline
        mqqgamebindinggroup
        mqqopensdkgrouptribeshare
        tencentapi.qq.reqContent
        tencentapi.qzone.reqContent
    

第七步：注意，还没有完！进入AppDelegate
1、导入#import “LCThirdLogin.h”
2、在- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions中为微信登录注册

[[LCThirdLogin shareInstance] wxLoginRegister];

3、遵守协议方法- (BOOL)application:(UIApplication *)app openURL:(NSURL *)url options:(NSDictionary *)options

- (BOOL)application:(UIApplication *)app openURL:(NSURL *)url options:(NSDictionary *)options {
    
    if ([url.absoluteString containsString:QQLOGIN_APPID]) {
        [QQApiInterface handleOpenURL:url delegate:[LCThirdLogin shareInstance]];
        return [TencentOAuth HandleOpenURL:url];
    }
    if ([url.absoluteString containsString:WXLOGIN_APPID]) {
        return [WXApi handleOpenURL:url delegate:[LCThirdLogin shareInstance]];
    }
    
    return YES;
}

大功告成！！！