我有这个结构:
struct message {
var id: String = "0"
var text: String = ""
var date: Date!
var status: String = ""
}
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我必须从dbase加载这个结构,它String也以格式导出date.所以我写这段代码转换String为Date类型:
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "yyyy-MM-dd HH:mm:ss"
dateFormatter.timeZone = NSTimeZone(abbreviation: "UTC") as TimeZone!
let dataDate = dateFormatter.date(from: elemMessage["date"] as! String)!
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我将它加载到结构中:
message(id: elemMessage["id"] as! String, text: elemMessage["text"] as! String, date: dataDate as! Date, status: elemMessage["status"] as! String)
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但是我有这个警告:"从不Date相关的类型转换Date总是失败"
因此,如果我运行应用程序,它将失败.
我怎样才能解决这个问题,date结构中的var必须是 …
试图添加Twitter Fabric SDK.我添加了Twitter建议的所有依赖项.
修改了我的build.gradle:
buildscript {
repositories {
jcenter()
maven { url 'https://maven.fabric.io/repo' }
}
dependencies {
classpath 'com.android.tools.build:gradle:0.13.3'
// The Fabric Gradle plugin uses an open ended version to
// react quickly to Android tooling updates
classpath 'io.fabric.tools:gradle:1.+'
}
}
apply plugin: 'com.android.application'
//Put Fabric plugin after Android plugin
apply plugin: 'io.fabric'
repositories {
jcenter()
maven { url 'https://maven.fabric.io/repo' }
}
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尝试同步时遇到此错误:
Error:Execution failed for task
':app:fabricGenerateResourcesDebug'. > Crashlytics Developer Tools error.
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在修改build.gradleTwitter SDK文件之前,项目已成功构建.
这是我的代码
// this event is attached to TableCell
public EventHandler dblclickDescription = new EventHandler<MouseEvent>(){
@Override
public void handle(MouseEvent event) {
if(event.getButton().equals(MouseButton.PRIMARY)){
if(event.getClickCount() == 2){
printRow(event.getTarget());
}
}
event.consume();
}
};
// print row
public void printRow(Object o){
Text text = (Text) o;
// ??? don't know what to write here
System.out.println(row.toString());
}
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1)如何从单击的单元格中获取行?
2)我可以将事件附加到整行而不是每列吗?
编辑:3)我以为我附上了活动 TableCell
TableCell cell = TableColumn.DEFAULT_CELL_FACTORY.call(p);
cell.setOnMouseClicked(dblclickDescription);
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但是当我测试时,
event.getSource();// is a TableColumn
event.getTarget();// is a Text if clicked on text
event.getTarget();// is a TableColumn if clicked …Run Code Online (Sandbox Code Playgroud) 我正在使用Spring Boot 2.0.5.RELEASE并尝试POST通过Response Template#Exchange以下方式发出请求,下面是我的代码,我还需要使用一些自定义键传递标头。
RestTemplate restTemplate = new RestTemplate();
MultiValueMap<String, String> headers = new LinkedMultiValueMap<>();
headers.add("key1", "key1");
headers.add("key2", "key2");
headers.add("Content-Type", MediaType.APPLICATION_JSON_VALUE);
HttpEntity<Object> request = new HttpEntity<Object>(myObject, headers);
ResponseEntity<MyObject> response = restTemplate
.exchange("apiurl", HttpMethod.POST, request, MyObject.class);
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以下是我在交换后请求时间遇到的错误,任何帮助都将不胜感激。
org.springframework.web.client.HttpClientErrorException: 422 Unprocessable Entity
at org.springframework.web.client.DefaultResponseErrorHandler.handleError(DefaultResponseErrorHandler.java:94)
at org.springframework.web.client.DefaultResponseErrorHandler.handleError(DefaultResponseErrorHandler.java:79)
at org.springframework.web.client.ResponseErrorHandler.handleError(ResponseErrorHandler.java:63)
at org.springframework.web.client.RestTemplate.handleResponse(RestTemplate.java:730)
at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:688)
at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:644)
at org.springframework.web.client.RestTemplate.exchange(RestTemplate.java:564)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:209)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:136)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:102)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:891)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:797)
at …Run Code Online (Sandbox Code Playgroud) 假设我在批处理脚本中定义了以下变量:
set VariableFirst=value1
set VariableLast=value2
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然后在代码的另一部分设置另一个变量
set Type=First
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我想访问其中之一,%VariableFirst%并%VariableLast%取决于变量的值%Type%(类似的东西,echo %Variable%Type%%但这是行不通的)。如何在Windows批处理脚本中执行此操作?
下面是我遇到的问题,当我单击列表项时onPress,它在键盘打开时第一次不起作用,因此我需要点按两次以进行操作,我们将为您提供帮助。
<FlatList
data={this.state.users}
renderItem={({ item,index }) => (
<ListItem
title={item.userName}
onPress={item => this.sendRequestToTheUser(item)}
containerStyle={{ borderBottomWidth: 0 }} />)}
keyExtractor={(item, index) => index.toString()}
extraData={this.state.userName} />
Run Code Online (Sandbox Code Playgroud) 有人可以解释一下netty方法究竟是ChannelHandlerContext flush()做什么的吗?它会立即通过网络发送所有消息,从而有效地绕过管道中的任何处理程序停止任何定义的处理吗?
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