IOS-发起微信支付方法

傷城~ 2023-10-17 08:23 11阅读 0赞

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];