iOS版微信开发小结（微信支付，APP跳转微信公众号）

最近公司心血来潮,一心要搞微信。废话不多说,直接上干货。

开发前准备:

1、在微信开发者平台获取开发者认证:(一年300元人民币)

PS:具体流程按照微信流程指示操作即可,在这就不废话了。

2、下载微信最新的SDK,引入到工程里边

3、导入相关系统库及文件,不导入会报错

4、在你的工程文件中选择Build Setting,在Search Paths中添加 libWeChatSDK.a, WXApi.h, WXApiObject.h 三个文件所在位置

5、配置info.plist文件

6、URL type设置

选中你的工程设置项,选中targets一栏,在info标签栏的URL type 添加URL scheme 为你所注册的应用程序id

1.app跳转微信

1、app跳转微信公众号

在工程中添加pch文件,导入 WXApi.h头文件,并在你需要跳转的界面增加WXApiDelegate协议

在你的跳转方法中添加一下代码:

JumpToBizProfileReq *req = [JumpToBizProfileReq new];
req.username = @"gh_64a69d298ecf"; // 原始ID
req.profileType = WXBizProfileType_Normal;
req.extMsg = @"";
[WXApi sendReq:req];

这样APP就可以掉起微信界面,进入微信公众号(如果之前没有关注过此微信公众号,就会进入微信公众号的关注界面)

2、APP跳转到微信相关的其他网页(如微信小店相关商品信息界面)

OpenWebviewReq *req = [OpenWebviewReq new];
req.url = @"需要微信内置浏览器打开的网址";
[WXApi sendReq:req];

PS:

原始ID: 申请公共号时系统给你的唯一编号,有此 id你更改微信号后依然能绑定公共号

APPID: 开通 api 服务时，系统给你的唯一编号

APPSECRET: 通俗一点儿来说就是密钥

2、微信支付

流程可能看起来有点复杂,下面我尽量给你们配图来说明

1、APP客户端下单(选择商品)

2、APP将商品数据传给后台服务器,请求生成支付订单

3、后台调用统一下单API向微信服务器发送请求生成预付单,并生成一个prepay_id返回给后台,后台再将prepay_id放回给客户端,成功生成订单信息

生成订单相关代码

AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
NSDictionary *signParaDic = @{@"schoolId":schoolId,
                                @"studentId":studentId,
                                @"parentId":parentId,
                                @"parentTel":phone,
                                @"totalFee":[NSString stringWithFormat:@"%i",payProduct.totalFee],
                                @"productId":[NSString stringWithFormat:@"%i",payProduct.productId],
                                @"productName":payProduct.productName};
NSString *sign = [EncodeParameter md5:signParaDic];
NSDictionary *parameters = @{@"schoolId":schoolId,
                                @"parentId":parentId,
                                @"studentId":studentId,
                                @"parentTel":phone,
                                @"totalFee":[NSString stringWithFormat:@"%i",payProduct.totalFee],
                                @"productId":[NSString stringWithFormat:@"%i",payProduct.productId],
                                @"productName":payProduct.productName,
                                @"sign":sign};
NSMutableURLRequest *request = [[AFHTTPRequestSerializer serializer] requestWithMethod:@"POST" URLString:WechatPlaceOrderAPI parameters:parameters error:nil];

_palceOrderOperation = [manager HTTPRequestOperationWithRequest:request  success:^(AFHTTPRequestOperation *operation, id responseObject) {
//
NSDictionary *resDic = (NSDictionary *)responseObject;
NSNumber *code = [resDic objectForKey:@"result"];
NSString *msg = [resDic objectForKey:@"message"];
    if ([code integerValue] == Success) {
        WeChatPreOrder *preOrder = [[WeChatPreOrder alloc] initWithDic:resDic];
         if (self.delegate && [self.delegate respondsToSelector:@selector(placeOrderSucess:preOder:)]) {
               [self.delegate placeOrderSucess:self preOder:preOrder];
         }
    } else if ([code integerValue] == 300) {
          if (self.delegate && [self.delegate respondsToSelector:@selector(placeOrderFailed:error:)]) {
          [self.delegate placeOrderFailed:self error:msg];
    }
  }else {
        if (self.delegate && [self.delegate respondsToSelector:@selector(placeOrderFailed:error:)]) {
            [self.delegate placeOrderFailed:self error:RequestError];
        }
    }
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
    if (self.delegate && [self.delegate respondsToSelector:@selector(placeOrderFailed:error:)]) {
        [self.delegate placeOrderFailed:self error:RequestError];
    }
}];

4、APP调用SDK打开微信,进行支付

微信客户端向微信服务器发起支付请求并返回支付结果(中间交互参数prepay_id,微信服务器要验证这个参数是否跟之前的prepay_id一致)

掉起微信支付相关代码

PayReq* req             = [[PayReq alloc] init];
req.partnerId           = weChatPreOrder.partnerId;
req.prepayId            = weChatPreOrder.prepayId;
req.nonceStr            = weChatPreOrder.noncestr;
req.timeStamp           = [weChatPreOrder.timestamp intValue];
req.package             = weChatPreOrder.package;
req.sign                = weChatPreOrder.sign;
[WXApi sendReq:req];

5、用户输入支付密码后,微信客户端跟微信服务器交互,确认支付

6、微信服务器将支付结果返回给微信客户端,并异步发送支付结果给我们后台

7、客户端可以调用后台查询支付订单接口,查询是否支付成功,并显示支付结果

查询订单相关代码

AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
NSDictionary *signParaDic = @{@"schoolId":[BCHTTPRequest schoolId],@"parentId":[BCHTTPRequest getUserId]};
NSString *sign = [EncodeParameter md5:signParaDic];
NSDictionary *parameters = @{@"schoolId":[BCHTTPRequest schoolId],@"parentId":[BCHTTPRequest getUserId],@"sign":sign};
NSMutableURLRequest *request = [[AFHTTPRequestSerializer serializer] requestWithMethod:@"POST" URLString:QueryOrderAPI parameters:parameters error:nil];

_operation = [manager HTTPRequestOperationWithRequest:request  success:^(AFHTTPRequestOperation *operation, id responseObject) {
//
NSDictionary *resDic = (NSDictionary *)responseObject;
NSNumber *code = [resDic objectForKey:@"result"];
NSString *msg = [resDic objectForKey:@"message"];
    if ([code integerValue] == Success) {
        NSArray *order = [self orderArray:resDic];
            if (self.delegate && [self.delegate respondsToSelector:@selector(queryOrderSucess:orders:)]) {
                [self.delegate queryOrderSucess:self orders:order];
            }
    } else if ([code integerValue] == 300) {
            if (self.delegate && [self.delegate respondsToSelector:@selector(queryOrderFailed:error:)]) {
                [self.delegate queryOrderFailed:self error:msg];
            }
    }else {
            if (self.delegate && [self.delegate respondsToSelector:@selector(queryOrderFailed:error:)]) {
                [self.delegate queryOrderFailed:self error:RequestError];
            }
    }
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        if (self.delegate && [self.delegate respondsToSelector:@selector(queryOrderFailed:error:)]) {
            [self.delegate queryOrderFailed:self error:RequestError];
        }
}];

MD5签名相关代码

+ (NSString *)md5:(NSDictionary *)paraDic {
// NOTE: 排序，得出最终请求字串
    NSArray* sortedKeyArray = [[paraDic allKeys] sortedArrayUsingComparator:^NSComparisonResult(id  _Nonnull obj1, id  _Nonnull obj2) {
        return [obj1 compare:obj2];
    }];
    NSMutableArray *tmpArray = [NSMutableArray new];
    for (NSString* key in sortedKeyArray) {
        NSString* value = [paraDic objectForKey:key];
        if ([value isKindOfClass:[NSNumber class]]) {
            value = [(NSNumber *)value stringValue];
        }
        if (value.length > 0) {
            NSString *keyValueStr = [NSString stringWithFormat:@"%@=%@",key,value];
            [tmpArray addObject:keyValueStr];
        }
    }
    NSString *parameterStr = [tmpArray componentsJoinedByString:@"&"];
    NSString *res = [NSString stringWithFormat:@"%@&key=%@",parameterStr,Key];
    return [[BCBaseObject MD5Hash:res] uppercaseString];
}

开发相关文档及资源

SDK下载

支付账户

协议规则

安全规范_签名方式