集成微信支付流程整理

1、首先到微信开放平台官网下载微信支付SDK，包含libWeChatSDK.a、WechatAuthSDK.h、WXApi.h、WXApiObject.h，如图：

2、添加依赖库：在object--General--Linked Framewarks and Libraries位置添加如下三方库：

3、在info--URL Type添加一个URL type，如图：红色圈里面填写在开放平台申请的唯一的AppId

4、此时工程已经配置好了微信支付的环境，接下来就是代码了

话不多说，直接上代码：

AppDelegate.h文件

#import "WXApi.h"
@interface AppDelegate : UIResponder <UIApplicationDelegate,WXApiDelegate>

　　

AppDelegate.m文件

#import "WechatAuthSDK.h"
#import "WXApiObject.h"

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    // Override point for customization after application launch.
    
    
    [WXApi registerApp:@"wxd930ea5d5a258f4f" withDescription:@"WeiXinDemo"];
    
    
    return YES;
}


- (BOOL)application:(UIApplication *)application handleOpenURL:(NSURL *)url{
    
    return [WXApi handleOpenURL:url delegate:self];
}

- (BOOL)application:(UIApplication *)app openURL:(NSURL *)url options:(NSDictionary<NSString *,id> *)options{
    
    return [WXApi handleOpenURL:url delegate:self];
}
-(void)onResp:(BaseResp*)resp{
    NSString * strMsg = [NSString stringWithFormat:@"errorCode: %d",resp.errCode];
    NSLog(@"strMsg: %@",strMsg);
    
    NSString * errStr       = [NSString stringWithFormat:@"errStr: %@",resp.errStr];
    NSLog(@"errStr: %@",errStr);
    
    
    NSString * strTitle;
    //判断是微信消息的回调 --> 是支付回调回来的还是消息回调回来的.
    if ([resp isKindOfClass:[SendMessageToWXResp class]])
    {
        strTitle = [NSString stringWithFormat:@"发送媒体消息的结果"];
    }
    
    NSString * wxPayResult;
    //判断是否是微信支付回调 (注意是PayResp 而不是PayReq)
    
    if ([resp isKindOfClass:[PayResp class]])
    {
        //支付返回的结果, 实际支付结果需要去微信服务器端查询
        strTitle = [NSString stringWithFormat:@"支付结果"];
        switch (resp.errCode)
        {
            case WXSuccess:
            {
                strMsg = @"支付结果:";
                NSLog(@"支付成功: %d",resp.errCode);
                wxPayResult = @"success";
                break;
            }
            case WXErrCodeUserCancel:
            {
                strMsg = @"用户取消了支付";
                NSLog(@"用户取消支付: %d",resp.errCode);
                wxPayResult = @"cancel";
                break;
            }
            default:
            {
                strMsg = [NSString stringWithFormat:@"支付失败! code: %d  errorStr: %@",resp.errCode,resp.errStr];
                NSLog(@":支付失败: code: %d str: %@",resp.errCode,resp.errStr);
                wxPayResult = @"faile";
                break;
            }
        }
        //发出通知 从微信回调回来之后,发一个通知,让请求支付的页面接收消息,并且展示出来,或者进行一些自定义的展示或者跳转
        NSNotification * notification = [NSNotification notificationWithName:@"WXPay" object:wxPayResult];
        [[NSNotificationCenter defaultCenter] postNotification:notification];
    }
}

　　

在需要调用微信支付的ViewController.m文件

- (void)viewWillAppear:(BOOL)animated{
    [super viewWillAppear:animated];
    
    //检测是否装了微信软件
    if ([WXApi isWXAppInstalled])
    {
        
        //监听通知
        [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(getOrderPayResult:) name:@"WXPay" object:nil];
    }
}

#pragma mark 移除通知
- (void)viewWillDisappear:(BOOL)animated
{
    [super viewWillDisappear:YES];
    
    //移除通知
    [[NSNotificationCenter defaultCenter] removeObserver:self];
}

- (IBAction)pay:(UIButton *)sender {
    
    
    if ([WXApi isWXAppInstalled])
        
    {
        
        [self sendNetWorking_WXPay];
        
    }
    
    else
        
    {
        
        UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"提示" message:@"未安装微信" delegate:self cancelButtonTitle:@"取消" otherButtonTitles:@"确定", nil];
        [alertView show];
        
    }
    
    
    
}
- (void)sendNetWorking_WXPay{
    
    PayReq *request = [[PayReq alloc] init];
    request.partnerId = @"10000100";
    request.prepayId= @"1101000000140415649af9fc314aa427";
    request.package = @"Sign=WXPay";
    request.nonceStr= @"a462b76e7436e98e0ed6e13c64b4fd1c";
    request.timeStamp= @"1397527777";
    request.sign= @"582282D72DD2B03AD892830965F428CB16E7A256";
    [WXApi sendReq:request];
    
}

#pragma mark - 事件
- (void)getOrderPayResult:(NSNotification *)notification
{
    NSLog(@"userInfo: %@",notification.userInfo);
    
    if ([notification.object isEqualToString:@"success"])
    {
        UIAlertView * alertView = [[UIAlertView alloc] initWithTitle:@"提示信息" message:@"支付成功" delegate:self cancelButtonTitle:@"确定" otherButtonTitles:nil, nil];
        [alertView show];
    }
    else if([notification.object isEqualToString:@"cancel"])
    {
        [self alert:@"提示" msg:@"用户取消了支付"];
    }
    else
    {
        [self alert:@"提示" msg:@"支付失败"];
    }
}

//客户端提示信息
- (void)alert:(NSString *)title msg:(NSString *)msg
{
    UIAlertView *alter = [[UIAlertView alloc] initWithTitle:title message:msg delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
    [alter show];
}