一、注册登录微信开放平台账号
- 注册登录微信开放平台账号
- 添加一个用于支付/分享的移动应用，等待审核通过
- 前往管理中心-移动应用，为通过审核的移动应用申请支付功能，并等待审核通过
申请支付功能
详细步骤参照微信支付官方文档 微信APP支付接入商户服务中心
二、集成微信SDK
-
前往微信资源中心下载 iOS 的 SDK，并添加到项目中
集成SDK
-
编辑
info.plist，将微信添加到 APP 跳转白名单
添加白名单
-
在
Targets-Info-URL Types添加微信的 APP_ID
设置 URL Types
-
在
AppDelegate处理相关回调（需要#import "WXApi.h"）
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
// 注册（如果使用了友盟，则先注册友盟）
[WXApi registerApp:@"wxd930ea5d5a258f4f"];
return YES;
}
- (BOOL)application:(UIApplication *)application handleOpenURL:(NSURL *)url {
return [WXApi handleOpenURL:url delegate:self];
}
- (BOOL)application:(UIApplication *)application openURL:(NSURL *)url sourceApplication:(NSString *)sourceApplication annotation:(id)annotation {
return [WXApi handleOpenURL:url delegate:self];
}
// 微信支付结果的回调
- (void)onResp:(BaseResp *)resp {
//启动微信支付的response
NSString *strMsg = [NSString stringWithFormat:@"errcode:%d", resp.errCode];
BOOL paySuccess = false;
if([resp isKindOfClass:[PayResp class]]){
//支付返回结果，实际支付结果需要去微信服务器端查询
switch (resp.errCode) {
case 0:
strMsg = @"支付结果：成功！";
paySuccess = true;
break;
case -1:
strMsg = @"支付结果：失败！";
break;
case -2:
strMsg = @"用户已经退出支付！";
break;
default:
strMsg = [NSString stringWithFormat:@"支付结果：失败！retcode = %d, retstr = %@", resp.errCode,resp.errStr];
break;
}
}
NSNotification *nofity = [[NSNotification alloc] initWithName:kNofificationWechatPayCallback object:nil userInfo:@{@"success":paySuccess ? @(YES) : @(NO) ,@"errMsg":paySuccess ? @"" : strMsg}];
[[NSNotificationCenter defaultCenter] postNotification:nofity];
}
- 定义几个需要用到的常量
// 商户号
static NSString *const kWx_MchId = @"YOUR_MCH_ID";
// AppId
static NSString *const kWx_AppId = @"YOUR_WX_AppID";
// 商户API密钥，商户平台登录账户和密码登录http://pay.weixin.qq.com 平台设置的“API密钥”，为了安全，请设置为以数字和字母组成的32字符串。
static NSString *const kWx_PartnerKey = @"YOUR_WX_PartnerKey";
// AppSecret
static NSString *const kWx_AppSecret = @"YOUR_WX_AppSecret";
// 服务端接收支付异步通知回调地址
static NSString *const kWx_NotifyURL = @"http://www.xxx.com/xxx.php";
- 调用微信支付关键代码
/**
微信支付
@param orderNo 订单号
@param orderDesc 订单信息
@param fee 金额（分）
*/
- (void)payWithOrderNo:(NSString *)orderNo orderDescription:(NSString *)orderDesc fee:(NSInteger)fee {
// 请求参数 (参数说明：https://pay.weixin.qq.com/wiki/doc/api/app/app.php?chapter=9_1)
NSMutableDictionary *params = @{}.mutableCopy;
params[@"appid"] = kWx_AppId; // 应用ID!
params[@"mch_id"] = kWx_MchId; // 商户号!
params[@"nonce_str"] = ({ // 随机字符串!
srand( (unsigned)time(0) );
[NSString stringWithFormat:@"%d", rand()];
});
params[@"body"] = orderDesc; // 商品描述!
params[@"out_trade_no"] = kWx_AppId; // 商户订单号!
params[@"total_fee"] = @(fee); // 总金额!
params[@"spbill_create_ip"] = @"196.168.1.1"; // 终端IP!
params[@"notify_url"] = kWx_NotifyURL; // 通知地址!
params[@"trade_type"] = @"APP"; // 交易类型!
params[@"sign"] = [self getSign:params]; // 签名!
// 转成xml
NSMutableString *xmlParams = @"".mutableCopy;
[xmlParams appendString:@"<xml>"];
[params enumerateKeysAndObjectsUsingBlock:^(NSString * _Nonnull key, id _Nonnull value, BOOL * _Nonnull stop) {
[xmlParams appendFormat:@"<%@>%@</%@>", key, value, key];
}];
[xmlParams appendString:@"</xml>"];
// 发送请求
NSURLSession *session = [NSURLSession sharedSession];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:@"https://api.mch.weixin.qq.com/pay/unifiedorder"]];
request.HTTPMethod = @"POST";
request.HTTPBody = [xmlParams dataUsingEncoding:NSUTF8StringEncoding];
NSURLSessionDataTask *task = [session dataTaskWithRequest:request completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
if (!error) {
// 返回的是xml
NSString *respXml = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
// 转换成字典
NSDictionary *respDict = [[[XEXMLHelper alloc] init] parseXML:respXml];
NSString *return_code = respDict[@"return_code"];
NSString *result_code = respDict[@"result_code"];
if ([return_code isEqualToString:@"SUCCESS"] && [result_code isEqualToString:@"SUCCESS"]) {
// 调起微信
PayReq *req = [[PayReq alloc] init];
req.partnerId = kWx_MchId;
req.prepayId = respDict[@"prepayId"];
req.nonceStr = respDict[@"nonce_str"];
req.timeStamp = (UInt32)[[NSDate date] timeIntervalSince1970];
req.package = @"Sign=WXPay";
// 传入参数进行二次签名
req.sign = [self getSign:@{
@"appid": kWx_AppId,
@"partnerid": req.partnerId,
@"noncestr": req.nonceStr,
@"package": req.package,
@"timestamp": @(req.timeStamp).stringValue,
@"prepayid": req.prepayId
}];
[WXApi sendReq:req];
}
else {
NSLog(@"接口返回错误, %@", respDict);
}
}
else {
NSLog(@"%@", error);
}
}];
[task resume];
}
/**
MD5加密
@param sourceString 源字符串
@return 加密后的字符串
*/
- (NSString *)getMD5:(NSString *)sourceString {
NSData *data = [sourceString dataUsingEncoding:NSUTF8StringEncoding];
unsigned char result[CC_MD5_DIGEST_LENGTH];
CC_MD5(data.bytes, (CC_LONG)data.length, result);
return [NSString stringWithFormat:
@"%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
result[0], result[1], result[2], result[3],
result[4], result[5], result[6], result[7],
result[8], result[9], result[10], result[11],
result[12], result[13], result[14], result[15]
];
}
/**
生成签名参数sign
@param params 参数
@return sign
*/
- (NSString *)getSign:(NSDictionary *)params {
NSMutableString *contentString =[NSMutableString string];
NSArray *keys = [params allKeys];
//按字母顺序排序
NSArray *sortedArray = [keys sortedArrayUsingComparator:^NSComparisonResult(id obj1, id obj2) {
return [obj1 compare:obj2 options:NSNumericSearch];
}];
//拼接字符串
for (NSString *categoryId in sortedArray) {
if (![[params objectForKey:categoryId] isEqualToString:@""]
&& ![categoryId isEqualToString:@"sign"]
&& ![categoryId isEqualToString:@"key"]
) {
[contentString appendFormat:@"%@=%@&", categoryId, [params objectForKey:categoryId]];
}
}
//添加key字段
[contentString appendFormat:@"key=%@", kWx_PartnerKey];
//得到MD5 sign签名
NSString *sign = [self getMD5:contentString];
return sign;
}
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