我正在尝试在整个应用程序中实现浅色和深色主题。我的问题是它无法正常工作。我有一个FATAL [mirrormaker-thread-0] Mirror maker thread failure due to (kafka.tools.MirrorMaker$MirrorMakerThread)
java.util.concurrent.ExecutionException: org.apache.kafka.common.errors.SslAuthenticationException: SSL handshake failed
at org.apache.kafka.clients.producer.KafkaProducer$FutureFailure.<init>(KafkaProducer.java:1344)
at org.apache.kafka.clients.producer.KafkaProducer.doSend(KafkaProducer.java:969)
at org.apache.kafka.clients.producer.KafkaProducer.send(KafkaProducer.java:897)
at org.apache.kafka.clients.producer.KafkaProducer.send(KafkaProducer.java:774)
at kafka.tools.MirrorMaker$MirrorMakerProducer.send(MirrorMaker.scala:709)
at kafka.tools.MirrorMaker$MirrorMakerThread$$anonfun$run$6.apply(MirrorMaker.scala:431)
at kafka.tools.MirrorMaker$MirrorMakerThread$$anonfun$run$6.apply(MirrorMaker.scala:431)
at scala.collection.Iterator$class.foreach(Iterator.scala:891)
at scala.collection.AbstractIterator.foreach(Iterator.scala:1334)
at scala.collection.IterableLike$class.foreach(IterableLike.scala:72)
at scala.collection.AbstractIterable.foreach(Iterable.scala:54)
at kafka.tools.MirrorMaker$MirrorMakerThread.run(MirrorMaker.scala:431)
Caused by: org.apache.kafka.common.errors.SslAuthenticationException: SSL handshake failed
Caused by: javax.net.ssl.SSLHandshakeException: General SSLEngine problem
at sun.security.ssl.Handshaker.checkThrown(Handshaker.java:1529)
at sun.security.ssl.SSLEngineImpl.checkTaskThrown(SSLEngineImpl.java:535)
at sun.security.ssl.SSLEngineImpl.writeAppRecord(SSLEngineImpl.java:1214)
at sun.security.ssl.SSLEngineImpl.wrap(SSLEngineImpl.java:1186)
at javax.net.ssl.SSLEngine.wrap(SSLEngine.java:469)
at org.apache.kafka.common.network.SslTransportLayer.handshakeWrap(SslTransportLayer.java:435)
at org.apache.kafka.common.network.SslTransportLayer.doHandshake(SslTransportLayer.java:301)
at org.apache.kafka.common.network.SslTransportLayer.handshake(SslTransportLayer.java:255)
at org.apache.kafka.common.network.KafkaChannel.prepare(KafkaChannel.java:79)
at org.apache.kafka.common.network.Selector.pollSelectionKeys(Selector.java:460)
at org.apache.kafka.common.network.Selector.poll(Selector.java:398)
at org.apache.kafka.clients.NetworkClient.poll(NetworkClient.java:460)
at org.apache.kafka.clients.producer.internals.Sender.run(Sender.java:239)
at org.apache.kafka.clients.producer.internals.Sender.run(Sender.java:163)
at java.lang.Thread.run(Thread.java:748)
Caused by: javax.net.ssl.SSLHandshakeException: General SSLEngine problem
at sun.security.ssl.Alerts.getSSLException(Alerts.java:192)
at sun.security.ssl.SSLEngineImpl.fatal(SSLEngineImpl.java:1728)
at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:330)
at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:322)
at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1614)
at sun.security.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:216)
at sun.security.ssl.Handshaker.processLoop(Handshaker.java:1052)
at sun.security.ssl.Handshaker$1.run(Handshaker.java:992)
at sun.security.ssl.Handshaker$1.run(Handshaker.java:989)
at java.security.AccessController.doPrivileged(Native Method)
at sun.security.ssl.Handshaker$DelegatedTask.run(Handshaker.java:1467)
at org.apache.kafka.common.network.SslTransportLayer.runDelegatedTasks(SslTransportLayer.java:389)
at org.apache.kafka.common.network.SslTransportLayer.handshakeUnwrap(SslTransportLayer.java:469)
at org.apache.kafka.common.network.SslTransportLayer.doHandshake(SslTransportLayer.java:328)
... 8 more
Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:397)
at sun.security.validator.PKIXValidator.engineValidate(PKIXValidator.java:302)
at sun.security.validator.Validator.validate(Validator.java:260)
at sun.security.ssl.X509TrustManagerImpl.validate(X509TrustManagerImpl.java:324)
at sun.security.ssl.X509TrustManagerImpl.checkTrusted(X509TrustManagerImpl.java:281)
at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:136)
at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1601)
... 17 more
Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
at sun.security.provider.certpath.SunCertPathBuilder.build(SunCertPathBuilder.java:141)
at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(SunCertPathBuilder.java:126)
at java.security.cert.CertPathBuilder.build(CertPathBuilder.java:280)
at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:392)
... 23 more
[2018-08-20 04:30:07,862] FATAL [mirrormaker-thread-0] Mirror maker thread exited abnormally, stopping the whole mirror maker. (kafka.tools.MirrorMaker$MirrorMakerThread)
，其中包含2个ContainerVC-ContainerViews和SidebarMenuVC。 DashboardVC已偏移，因此最初显示的是用户SidebarMenuVC。
DashboardVC嵌入在ContainerVC中，并且有一个汉堡包类型菜单。当用户点击该菜单按钮时，将显示UINavigationController。一切正常。
SidebarMenuVC包含负责更改应用程序主题的图像。当用户点击图像时，图像从亮变为暗，反之亦然。点击的瞬间会更改SidebarMenuVC的主题，但是当您隐藏菜单（通过滑动）时，SidebarMenuVC的主题不会被应用。我尝试使用DashboardVC来做到这一点，但我认为我做得不正确（嗯，它无法正常工作，所以我知道我已经搞砸了）。
protocol因此，总体情况是：当用户向右滑动到protocol ReloadTheme {
func reload()
}
class ContainerVC: UIViewController, SidebarDelegate {
var delegateReloadTheme: ReloadTheme?
func hideMenu() {
sideBarMenuLeadingConstraint.constant = -300
applyTheme()
animateConstraint()
delegateReloadTheme?.reload() // when I put a breakpoint here, it shows it's nil
}
}
extension DashboardVC : ReloadTheme {
func reload() {
applyTheme()
}
}
（位于hideMenu()中时，它需要以某种方式访问ContainerVC并呼叫DashboardVC
协议/代表总是使我感到困惑，因此欢迎您提供一些帮助。
好的，根据要求，这是applyTheme()的连接方式：
sidebarMenu然后在protocol SideBarDelegate: class {
func showMenu()
func hideMenu()
}
class DashboardVC: UIViewController {
static weak var delegateSideBar: SideBarDelegate?
@IBAction func sideMenuButtonPressed(_ sender: UIBarButtonItem) {
Dashboard.delegateSideBar?.showMenu()
}
}
中：
ContainerVC这就是滑动菜单的工作方式及其连接方式。
答案 0 :(得分：1)
您需要将代表分配到某个地方-这是可选类型。
例如，在viewDidLoad中，您可以说item.delegateReloadTheme = self。
您需要显示更多有关DashboardVC的代码。
基本上，当您创建委托时，您正在为需要委托的工作创建接口，并将其委托给其他类。因为您几乎可以在代码中的任何地方实现委托，所以您需要告诉谁负责实现该委托（接口）。
例如：
protocol RefresherDelegate {
func refreshUI()
}
我们在这里定义将委托哪些函数。
class MyView : UIView {
var delegate: RefresherDelegate?
}
在这里，我们创建一个变量，该变量将保存实际包含RefresherDelegate的对象。
class MyObject : RefresherDelegate {
var myView = MyView()
您在这里说MyObject将实现RefresherDelegate并创建简单的MyView实例（不会在UI上显示，只是简单的示例）
func assignDelegate() {
myView.delegate = self
}
这是至关重要的部分-将委托分配给它的实现-在这种情况下为MyObject。
在assignDelegate()之后，当您实际调用refreshUI()时，它将在MyObject中被调用。