申请appid ，appkey，添加sdk，注册应用程序，微信没有被启动

Question

1.应用名称： 苏宁易购 iPhone

AppID   ：  wxe386966df7b712ca

2.在

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    //注册微信
    [WXApi registerApp:@" wxe386966df7b712ca"];
}

3。在URLtypes 里添加： identifier 苏宁易购 iPhone； url scheme为wxe386966df7b712ca
4.

- (void)sendWeiXinContent{
    if ([WXApi isWXAppInstalled]  && [WXApi isWXAppSupportApi]) {
        WXMediaMessage *message  = [WXMediaMessage message];
        message.title =  self.shareTitle ;
        message.description = self.shareContent;
        [message setThumbImage:self.shareImage];
        
        WXImageObject *ext = [WXImageObject object];
        ext.imageUrl  = @"";
        message.mediaObject = ext;
        
        SendMessageToWXReq *req = [[[SendMessageToWXReq alloc]init]autorelease];
        req.bText  =NO;
        req.message = message;
        req.scene = _sence;

        [WXApi sendReq:req];   
    }

执行这个函数时为什么没有进到if里面，微信始终没有被启动？