需求就是外部app 获取微信里的发票助手里面的发票信息。
先看看微信文档
https://developers.weixin.qq.com/doc/offiaccount/WeChat_Invoice/E_Invoice/Reimburser_API_List.html#4
（1）先获取Token
就是用Get 请求获取token ,参数有两个APPID，和APPSECRET ，这两个参数我们在平台创建APP时候就得到了
NSString *url = [NSString stringWithFormat:@"https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=%@&secret=%@",@"你的appid",@"你的secret"];
参考文档：https://developers.weixin.qq.com/doc/offiaccount/WeChat_Invoice/Nontax_Bill/API_list.html#1.1
（2）获取ticket
就是用Get 请求获取ticket ,参数是上一步获取的token。其他参数定值。
NSString *url = [NSString stringWithFormat:@"https://api.weixin.qq.com/cgi-bin/ticket/getticket?access_token=%@&type=wx_card",token];
参考文档：https://developers.weixin.qq.com/doc/offiaccount/WeChat_Invoice/Nontax_Bill/API_list.html#1.1
（3）获取签名数据
看一下文档里的签名算法
参考文档：https://developers.weixin.qq.com/doc/offiaccount/OA_Web_Apps/JS-SDK.html#62
主要代码：
#import <CommonCrypto/CommonDigest.h>
- (NSString *)sha1:(NSString *)input
{
NSData *data = [input dataUsingEncoding:NSUTF8StringEncoding];
uint8_t digest[CC_SHA1_DIGEST_LENGTH];
CC_SHA1(data.bytes, (unsigned int)data.length, digest);
NSMutableString *output = [NSMutableString stringWithCapacity:CC_SHA1_DIGEST_LENGTH * 2];
for(int i=0; i<CC_SHA1_DIGEST_LENGTH;i++){
[output appendFormat:@"%02x", digest[i]];
}
return output;
}
-(NSString *)getCardsign:(NSString *)ticket
{
NSMutableDictionary *parDic = [NSMutableDictionary dictionary];
NSString *timestamp = [NSString stringWithFormat:@"%ld",(long)[NSDate date].timeIntervalSince1970];
[parDic setObject:timestamp forKey:@"timestamp"];
NSString *nonceStr= [NSString stringWithFormat:@"%d", rand()];
[parDic setObject:nonceStr forKey:@"nonceStr"];
[parDic setObject:ticket forKey:@"api_ticket"];
[parDic setObject:@"你的appID" forKey:@"appid"];
[parDic setObject:@"INVOICE" forKey:@"cardType"];
//先把这个存起来，因为后面进入微信用到的时间戳，要和签名这一致，不然拿不到发票列表
[[NSUserDefaults standardUserDefaults] setObject:parDic forKey:@"cardSignDic"];
[[NSUserDefaults standardUserDefaults] synchronize];
NSMutableString *contentString=[NSMutableString string];
NSArray *values = [parDic allValues];
//按字母顺序排序
NSArray *sortedArray = [values sortedArrayUsingComparator:^NSComparisonResult(id obj1, id obj2) {
return [obj1 compare:obj2 options:NSNumericSearch];
}];
//拼接字符串
for (NSString *value in sortedArray) {
[contentString appendFormat:@"%@", value];
}
NSString *cardSign = [self sha1:contentString];
return cardSign;
}
（4）吊起微信获取发票信息
-(void)goTowechat:(NSString *)sign
{
NSDictionary *parDic = [[NSUserDefaults standardUserDefaults] objectForKey:@"cardSignDic"];
WXChooseInvoiceReq *chooseInvoiceReq = [[WXChooseInvoiceReq alloc] init];
chooseInvoiceReq.appID = @"你的appID";
//前面获取的
chooseInvoiceReq.cardSign = sign;
//前面存的
chooseInvoiceReq.nonceStr = [parDic objectForKey:@"nonceStr"];
chooseInvoiceReq.signType = @"SHA1";
//前面存的
chooseInvoiceReq.timeStamp = [[parDic objectForKey:@"timestamp"] doubleValue];
[WXApi sendReq:chooseInvoiceReq completion:^(BOOL success) {
}];
}
回调方法在微信的回调代理方法中
主要代码
- (void)onResp:(BaseResp *)resp
{
if ([resp isKindOfClass:[WXChooseInvoiceResp class]]){
//这里面有数组，自己怎么用都行了，over
WXChooseInvoiceResp *chooseInvoiceResp = (WXChooseInvoiceResp *)resp;
NSLog(@"%@",chooseInvoiceResp.cardAry);
}
}
网友评论