第三方分享（新浪，微信，QQ）

-(BOOL)application:(UIApplication *)application openURL:(NSURL *)url sourceApplication:(NSString *)sourceApplication annotation:(id)annotation
{
if ([url.scheme isEqualToString:WEIXINAPPID])
{
if (_weixinshare==nil) {
_weixinshare=[[WeiXinShare alloc]init];
}
return [WXApi handleOpenURL:url delegate:_weixinshare];
}
else if ([url.scheme isEqualToString:@"wb1566451595"])
{
if (_sinaweiboshare==nil) {
_sinaweiboshare=[[SinaWeiboShare alloc]init];
}

return [WeiboSDK handleOpenURL:url delegate:_sinaweiboshare];
}
else if ([url.scheme isEqualToString:@"tencent100794309"])
{
if (_tencenqqshare==nil) {
_tencenqqshare=[[TencenQQshare alloc]init];
}
return [QQApiInterface handleOpenURL:url delegate:_tencenqqshare];
}
return YES;
}