我的开发人员证书和个人资料有些问题.我的办公室Mac上有开发人员计划证书.我想在家里的设备上开发和测试应用程序,所以我添加了我的设备并从办公室Mac生成了配置文件.在我的家用Mac上下载并安装*.cer和配置,但是我看到了错误:
The identity 'iPhone Developer' doesn't match any valid, non-expired certificate/private key pair in your keychains
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如何将密钥从办公室Mac转移到我的家用Mac?
是否可以将std :: vector作为auto返回?例如:
auto retVec() {
std::vector<int> vec_l;
l.push_back(1);
l.push_back(2);
return vec_l;
}
...
auto ret_vec = retVec();
for (auto& it : ret_vec) {
}
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当我写这样的东西时,我收到一个错误:
auto retVec()前扣除auto--->
auto ret_vec = retVec(**)**;auto&&从ret_vec---> 推断for (auto it :
**ret_vec**) {我怎么写这个呢?
更新:对不起.我在课堂上使用这个retVec作为方法,它不起作用.当我在课堂上使用它作为功能时 - 一切正常.我在制定问题时犯了错误.
我有一些简单的问题.
我可以只使用AsyncTask对java进行长轮询吗?
class makepolling extends AsyncTask<String, String, String> {
String TAG = "AndroidPolling";
int CONNECTION_TIMEOUT = 900000;
int mHeartbeat = 10000;
int TIMEOUT_TOLERANCE = 5000;
String mPushURL = "https://my_serv_adress/service";
@Override
protected String doInBackground(String... arg0) {
String result = null;
DefaultHttpClient def = new DefaultHttpClient();
HttpParams httpParams = def.getParams();
HttpConnectionParams.setConnectionTimeout(httpParams, CONNECTION_TIMEOUT);
ConnManagerParams.setTimeout(httpParams, CONNECTION_TIMEOUT);
HttpPost httpPost = new HttpPost(mPushURL);
httpPost.addHeader("Accept", "application/json");
try {
Log.i(TAG, "Executing POST(PUSH) request " + httpPost.getRequestLine());
HttpResponse httpResponse = def.execute(httpPost);
Log.i(TAG, result);
Log.i(TAG, String.valueOf(httpResponse.getProtocolVersion()));
Log.i(TAG, String.valueOf(httpResponse.getEntity().getContent())); //For testing …Run Code Online (Sandbox Code Playgroud) 我有一些问题.
我有两种方法,一种用Api 11及以上调用,另一种用于旧api.
我的项目有一些设置:
项目构建目标 - Google API 2.3.3
清单文件:
uses-sdk android:minSdkVersion="8"
android:targetSdkVersion="18"
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我的代码:
abstract class DoAsyncRequest {
protected abstract void DoRequest(Connection conn) throws Exception;
}
class DoAsyncRequestLegacy extends DoAsyncRequest {
protected void DoRequest(Connection conn) throws Exception{
new FetchTask(conn).execute();// FOR OLD API
}
}
@TargetApi(11) class DoAsyncRequest_SDK11 extends DoAsyncRequest {
protected void DoRequest(Connection conn) throws Exception{
new FetchTask(conn).executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR, null); //FOR NEW API, but compiller says, that THREAD_POOL_EXECUTOR cannot be resolved or is not a field
}
}
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最好的祝福.
我有字符串对象:
String qwe =
"{\"myObj\":"
+ "{"
+ "\"first\":123,"
+ "\"second\":111.0}"
+"}";
我的代码
private static final String TAG_FIRST = "first";
res = new JSONObject(qwe);
Double q1 = res.getDouble(TAG_FIRST);
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我有"先没有价值"的例外.
我做错了什么?
抱歉我的英语不好.最好的祝福
这是正确的使用方法吗std::forward?
struct Command {
public:
int32_t uniqueID{0};
public:
Command() = default;
template<typename T>
Command(T&& _uniqueID) : uniqueID(std::forward<int32_t>(_uniqueID)) //
{
//
}
};
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或者我应该使用这条线?
Command(T&& _uniqueID) : uniqueID(std::forward<T>(_uniqueID))
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