iOS_微信支付

通过h5界面来调度微信支付：

1.在代理方法里面实现截取的json串（当然得判断有没有）

2.将json串解密

NSString * string = [self decryptUseDES:jsonStr key:S_key]; // jsonStr 为加密json

串

其中解密的方法：

//解密

- (NSString ) decryptUseDES:(NSString)cipherText key:(NSString*)key

{

NSData* cipherData = [GTMBase64 decodeString:cipherText];

unsigned char buffer[1024];

memset(buffer, 0, sizeof(char));

size_t numBytesDecrypted = 0;

Byte iv[] = {1,2,3,4,5,6,7,8};

CCCryptorStatus cryptStatus = CCCrypt(kCCDecrypt,

kCCAlgorithmDES,

kCCOptionPKCS7Padding,

[key UTF8String],

kCCKeySizeDES,

iv,

[cipherData bytes],

[cipherData length],

buffer,

1024,

&numBytesDecrypted);

NSString* plainText = nil;

if (cryptStatus == kCCSuccess) {

NSData* data = [NSData dataWithBytes:buffer length:(NSUInteger)numBytesDecrypted];

plainText = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];

}

return plainText;

}

3.将解密后的json串转化成字典

NSDictionary * jsonDic = [self dictionaryWithJsonString:string];

//根据json串得到dic

- (NSDictionary )dictionaryWithJsonString:(NSString )jsonString {

if (jsonString == nil) {

return nil;

}

NSData *jsonData = [jsonString dataUsingEncoding:NSUTF8StringEncoding];

NSError *err;

NSDictionary *dic = [NSJSONSerialization JSONObjectWithData:jsonData

options:NSJSONReadingMutableContainers

error:&err];

if(err) {

NSLog(@”json解析失败：%@”,err);

return nil;

} return dic;

}

4.然后用字典请求微信支付：

- (void)WXpaySendRequestWithDic:(NSDictionary *)dic{

//此处请求接口；

PayReq *request = [[PayReq alloc] init];

request.partnerId = dic[@”PARTNER_ID”];

request.prepayId= dic[@”prePayid”];

request.package = dic[@”package”];

request.nonceStr= dic[@”noncestr”];

request.timeStamp= [dic[@”timestamp”]intValue];

request.sign= dic[@”sign”];

[WXApi sendReq:request];

}

微信支付的SDK，这里连个代理都没有，所以，你想获取支付后的结果的返回信息，需要去AppDelegate里，添加如下代码，添加微信的代理：

(BOOL)application:(UIApplication )application openURL:(NSURL )url sourceApplication:(NSString *)sourceApplication annotation:(id)annotation

{

return [WXApi handleOpenURL:url delegate:self];

}

然后，再实现这个方法：

-(void) onResp:(BaseResp*)resp

通过这个方法，你就可以获取微信支付后的信息了。但是如果这样，所有的支付代码都在AppDelegate里，不好，至少微信给的例子就是这样。我的方法是添加通知，代码如下：

-(void) onResp:(BaseResp*)resp

{

if ([resp isKindOfClass:[PayResp class]])

{

PayResp response = (PayResp )resp;

// NSString *strTitle = [NSString stringWithFormat:@”支付结果”];

// NSString *strMsg = [NSString stringWithFormat:@”errcode:%d”, response.errCode];

// UIAlertView *alert = [[UIAlertView alloc] initWithTitle:strTitle

// message:strMsg

// delegate:self

// cancelButtonTitle:@”OK”

// otherButtonTitles:nil, nil];

// [alert show];

switch (response.errCode) {

case WXSuccess: {

NSNotification *notification = [NSNotification notificationWithName:ORDER_PAY_NOTIFICATION object:@”success”];

[[NSNotificationCenter defaultCenter] postNotification:notification];

break;

}

default: {

NSNotification *notification = [NSNotification notificationWithName:ORDER_PAY_NOTIFICATION object:@”fail”];

[[NSNotificationCenter defaultCenter] postNotification:notification];

break;

}

}

}

}

然后，在支付那个VC，添加通知#pragma mark - tabBar隐藏

- (void)viewWillAppear:(BOOL)animated {

[super viewWillAppear:animated];

if([WXApi isWXAppInstalled]) // 判断 用户是否安装微信

{

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(getOrderPayResult:) name:ORDER_PAY_NOTIFICATION object:nil];//监听一个通知

}

}#pragma mark - tabbar还原

- (void)viewWillDisappear:(BOOL)animated

{

[super viewWillDisappear:animated];

[[NSNotificationCenter defaultCenter]removeObserver:self];//移除通知

}