开发目标：实现从微信获取发票列表并多选选择发票在系统中
使用要求：微信开放平台iOS sdk版本1.7.7以上版本（增加发票）
开发步骤（比较简单，均通过微信官文get请求完成，我用的AF请求的，这个随意）
1、请求AccessToken，只需你的appid 和 appsecret就行了；不过这个一般都是由服务器来控制，便于管理，时限是7200s。
- (void)getWxAccessToken
2、获取api_ticket,需要用到第一步的AccessToken；临时票据，后面签名使用
(void)getWxApi_ticket
{
//https请求方式: GET
AFHTTPSessionManager *manager =[AFHTTPSessionManager manager];
NSMutableDictionary *mudic = [[NSMutableDictionary alloc]initWithObjectsAndKeys:@"wx_card",@"type", nil];
//上文提供的
[mudic setObject:access_token forKey:@"access_token"];
[managerGET:@"https://api.weixin.qq.com/cgi-bin/ticket/getticket" parameters:mudicprogress:nil success:^(NSURLSessionDataTask * _Nonnull task, id_Nullable responseObject) {
NSString *ticket = [responseObject objectForKey:@“ticket”];
}failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error){}];}
3、获取签名方法，需要用到的参数，看下图方法：
- (NSString *)getCardsign
{
NSMutableDictionary *parDic = [NSMutableDictionary dictionary];
NSString *timestamp = [NSStringstringWithFormat:@"%ld",(long)[NSDate date].timeIntervalSince1970];
[parDic setObject:timestamp forKey:@"timestamp"];
NSString *nonceStr= [NSStringstringWithFormat:@"%d", rand()];
[parDic setObject:nonceStr forKey:@"nonceStr"];
[parDic setObject:[[NSUserDefaults standardUserDefaults]objectForKey:@"wx_ticket"] forKey:@"api_ticket"];
[parDic setObject:WXAPPKEY 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 = [valuessortedArrayUsingComparator:^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;
}
//sha1加密方式
- (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 = [NSMutableStringstringWithCapacity:CC_SHA1_DIGEST_LENGTH * 2];
for(int i=0; i [output appendFormat:@"%02x", digest[i]]; } return output; } 4、进入微信，请求发票信息 //请求发票信息 + (BOOL)chooseInvoice { NSDictionary *parDic = [[NSUserDefaults standardUserDefaults] objectForKey:@"cardSignDic"]; WXChooseInvoiceReq *chooseInvoiceReq = [[WXChooseInvoiceReq alloc] init]; chooseInvoiceReq.appID = appid; //前面获取的 chooseInvoiceReq.cardSign = xxx; //前面存的 chooseInvoiceReq.nonceStr = [parDic objectForKey:@"nonceStr"]; chooseInvoiceReq.signType = @"SHA1"; //前面存的 chooseInvoiceReq.timeStamp = [[parDic objectForKey:@"timestamp"] doubleValue]; return [WXApi sendReq:chooseInvoiceReq]; } 到这就可以进入到微信，看到你开的电子发票的列表了； 怎么获取信息？ 进入appdelegate - (BOOL) application:(UIApplication*)application openURL:(nonnull NSURL *)url sourceApplication:(nullable NSString*)sourceApplication annotation:(nonnull id)annotation { NSLog(@"%@", url.absoluteString); NSLog(@"Calling Application Bundle ID: %@",sourceApplication); NSLog(@"URL scheme:%@", [url scheme]); NSLog(@"URL query: %@", [url query]); if([sourceApplication rangeOfString:WXAPP_ID].length > 0) { //设置实现回调的类，写上面的方法的单例类就行 return [WXApi handleOpenURL:url delegate:yourdelegate]; } return YES; } - (BOOL)application:(UIApplication*)application handleOpenURL:(NSURL *)url { //设置实现回调的类，写上面的方法的单例类就行 return[WXApi handleOpenURL:urldelegate:yourdelegate]; } 回调方法： -(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; } } 很简单，微信良心。