iOS微信登陆根据token获取用户信息

+ (void)getWechatAccessTokenWithCode:(NSString *)code Hnadle:(void (^)(NSString *))handle
    {
        
        NSMutableDictionary *loginDatas = [NSMutableDictionary new];
        NSString *url =[NSString stringWithFormat:@"https://api.weixin.qq.com/sns/oauth2/access_token?appid=%@&secret=%@&code=%@&grant_type=authorization_code",wx_id,wx_secret,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];
                    
                    [loginDatas setObject:dic[@"access_token"] forKey:@"access_token"];
                    [loginDatas setObject:dic[@"openid"] forKey:@"openid"];
                    [loginDatas setObject:dic[@"refresh_token"] forKey:@"refresh_token"];
                    
                    //根据accesstoken和openid获取用户信息
                    NSString *url =[NSString stringWithFormat:@"https://api.weixin.qq.com/sns/userinfo?access_token=%@&openid=%@",dic[@"access_token"], dic[@"openid"]];
                    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];
                                
                                [loginDatas setObject:dic[@"nickname"] forKey:@"nickname"];
                                [loginDatas setObject:dic[@"unionid"] forKey:@"unionid"];
                                
                                handle([WXHelper convertToJsonData:loginDatas]);
                                
                            }
                        });
                    });
                }
            });
        });
    }
    
#pragma mark - Tools 字典转json
+(NSString *)convertToJsonData:(NSDictionary *)dict{
    
    NSError *error;
    
    NSData *jsonData = [NSJSONSerialization dataWithJSONObject:dict options:NSJSONWritingPrettyPrinted error:&error];
    
    NSString *jsonString;
    
    if (!jsonData) {
        
        NSLog(@"%@",error);
        
    }else{
        
        jsonString = [[NSString alloc]initWithData:jsonData encoding:NSUTF8StringEncoding];
        
    }
    
    NSMutableString *mutStr = [NSMutableString stringWithString:jsonString];
    
    NSRange range = {0,jsonString.length};
    
    //去掉字符串中的空格
    
    [mutStr replaceOccurrencesOfString:@" " withString:@"" options:NSLiteralSearch range:range];
    
    NSRange range2 = {0,mutStr.length};
    
    //去掉字符串中的换行符
    
    [mutStr replaceOccurrencesOfString:@"\n" withString:@"" options:NSLiteralSearch range:range2];
    
    return mutStr;
    
}