IOS-发起微信支付方法

WXPay+MD5.h

// // NSObject+MD5.h // NEWDLD // // Created by zz on 16/7/28. // Copyright © 2016年 dld. All rights reserved. // #import <Foundation/Foundation.h> #import "WXApi.h" @interface MD5 : NSObject + (NSString *)getMd5_32Bit_String:(NSString *)srcString; //创建发起支付时的sign签名 +(NSString *)createMD5SingForPayWithAppID:(PayReq *)req; @end

WXPay+MD5.m

// // NSObject+MD5.m // NEWDLD // // Created by zz on 16/7/28. // Copyright © 2016年 dld. All rights reserved. // #import "WXPay+MD5.h" #import <CommonCrypto/CommonDigest.h> @implementation MD5 + (NSString *)getMd5_32Bit_String:(NSString *)srcString { const char *cStr = [srcString UTF8String]; unsigned char digest[CC_MD5_DIGEST_LENGTH]; CC_MD5( cStr, strlen(cStr), digest ); NSMutableString *result = [NSMutableString stringWithCapacity:CC_MD5_DIGEST_LENGTH * 2]; for(int i = 0; i < CC_MD5_DIGEST_LENGTH; i++) [result appendFormat:@"%02x", digest[i]]; return result; } //创建发起支付时的sign签名 +(NSString *)createMD5SingForPayWithAppID:(PayReq *)req { NSString *parter_key = @"dld123******************"; NSMutableDictionary *signParams = [NSMutableDictionary dictionary]; [signParams setObject:req.openID forKey:@"appid"];//微信appid [signParams setObject:req.nonceStr forKey:@"noncestr"];//随机字符串 [signParams setObject:req.package forKey:@"package"];//扩展字段 参数为 Sign=WXPay [signParams setObject:req.partnerId forKey:@"partnerid"];//商户账号 [signParams setObject:req.prepayId forKey:@"prepayid"];//此处为统一下单接口返回的预支付订单号 [signParams setObject:[NSString stringWithFormat:@"%ld",req.timeStamp] forKey:@"timestamp"];//时间戳 NSMutableString *contentString =[NSMutableString string]; NSArray *keys = [signParams 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 ( ![[signParams objectForKey:categoryId] isEqualToString:@""] && ![[signParams objectForKey:categoryId] isEqualToString:@"sign"] && ![[signParams objectForKey:categoryId] isEqualToString:@"key"] ) { [contentString appendFormat:@"%@=%@&", categoryId, [signParams objectForKey:categoryId]]; } } //添加商户密钥key字段 API 密钥 [contentString appendFormat:@"key=%@", parter_key]; NSString *result = [MD5 getMd5_32Bit_String:contentString];//md5加密 return result; } @end 发起支付

PayReq *req = [[PayReq alloc]init]; req.openID = [[NSString alloc]initWithFormat:@"%@",payUrl[@"appid"]]; req.partnerId = payUrl[@"partnerid"]; req.prepayId = payUrl[@"prepayid"]; req.nonceStr = payUrl[@"noncestr"]; req.timeStamp = (UInt32)[payUrl[@"timestamp"]integerValue]; req.package = @"Sign=WXPay"; req.sign = [MD5 createMD5SingForPayWithAppID:req];//payUrl[@"sign"]; BOOL flag = [WXApi sendReq:req];