1.申请AppID，导入依赖库，配置URL Scheme这里就不深究了，各位看官请自行百度.
2.在AppDelegate中导入头文件,遵守WXApiDelegate,然后在launch里注册AppID.
3.在支付界面导入头文件，创建支付对象，调起微信
//调起微信支付,传入参数
PayReq* req = [[[PayReq alloc] init]autorelease];
req.openID = APPI_ID;
req.partnerId = PARTNER_ID;
req.prepayId = prePayid;
req.nonceStr = nonce_str;
req.timeStamp = now;
req.package = package;
req.sign = sign;
[WXApi safeSendReq:req];
4.微信支付的回调需要添加在AppDelegate中
- (BOOL)application:(UIApplication *)application openURL:(NSURL *)url sourceApplication:(NSString *)sourceApplication annotation:(id)annotation
{
//返回应用后的回调，通过handleOpenURL进入微信支付的回调onResp:(BaseResp*)resp
return [WXApi handleOpenURL:url delegate:self];
}
-(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:strTitlemessage: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;
}
}
}
}
但是将微信支付相关的代码全部写到AppDelegate中又会显得代码冗余，这时我们需要创建通知，在成功回调后发出通知，在支付界面监听回调，完成支付.
5.在监听回调中，上传我们从微信支付中获得的参数，完成支付.
http://www.jianshu.com/p/97d38b00e53d?plg_nld=1&plg_auth=1&plg_nld=1&plg_dev=1&plg_uin=1&plg_usr=1&plg_vkey=1&plg_nld=1&plg_uin=1&plg_nld=1&plg_auth=1&plg_usr=1&plg_vkey=1&plg_dev=1
http://www.tuicool.com/articles/32UFBzQ?plg_nld=1&plg_uin=1&plg_auth=1&plg_nld=1&plg_usr=1&plg_vkey=1&plg_dev=1
http://www.jianshu.com/p/6e75a450dcc4?plg_nld=1&plg_uin=1&plg_auth=1&plg_nld=1&plg_usr=1&plg_vkey=1&plg_dev=1