self.performSelector如何传整形参数

`self.performSelector` 方法用于在其他线程上调用对象的方法。当需要向方法传递整型参数时，你可以将整数值作为参数列表的一部分直接传递。例如：

let myIntValue = 10 // 定义一个整型变量
@objc func jumpHandleView(with delay: Int) {
    // 这里 delay 参数就是接收的整型值
    DispatchQueue.main.asyncAfter(deadline: .now() + TimeInterval(delay)) {
        print("Jumping after \(delay) seconds")
    }
}

// 调用方法并传入整数10
self.performSelector(#selector(jumpHandleView), withObject: [myIntValue])

在这个例子中，我们将整数10作为一个字典的键，因为 `performSelector` 可能期望的是 `NSInvocation` 或者 `Selector` 等对象形式的数据。然后在目标方法 `jumpHandleView(with:)` 中通过解包数组获取到整数。

相关问题

在swift中的performSelector()传多个参数

在Swift中，`performSelector(_:with:)` 或者 `perform(_:with:)` 是运行时操作的一个方法，允许在特定的时间点执行一个方法，通常是在主线程之外，比如在后台线程完成耗时任务后更新UI。如果你想要传递多个参数给这个方法，你可以这样做：

// 使用闭包形式传递多个参数
let myClosure = { (param1: Int, param2: String) in
    // 在这里处理参数
}

myObject.performSelector(#selector(myClosure), withArguments: [5, "Hello"]) // 参数是数组

// 或者使用元组
let params = (arg1: 5, arg2: "Hello")
myObject.performSelector(#selector(myClosure), with: params)

// 对于函数或方法，你需要使用NSInvocation
let invocation = NSInvocation.invocationWithMethodSignature(forSelector: #selector(myFunction))
invocation.setArgument(&param1, at: 2)
invocation.setArgument(&param2, at: 3)
myObject.invoke(invocation, using: nil)

注意，传递参数的方式取决于你要调用的是哪种类型的接收者（方法、闭包还是函数）。另外，`#selector()` 是用于获取方法签名的占位符，你需要替换为你实际要执行的函数名。

- (void)close { // Empty queues. [self emptyQueues]; [partialReadBuffer release]; partialReadBuffer = nil; [NSObject cancelPreviousPerformRequestsWithTarget:self selector:@selector(disconnect) object:nil]; // Close streams. if (theReadStream != NULL) { CFReadStreamSetClient(theReadStream, kCFStreamEventNone, NULL, NULL); CFReadStreamUnscheduleFromRunLoop (theReadStream, theRunLoop, kCFRunLoopDefaultMode); CFReadStreamClose (theReadStream); CFRelease (theReadStream); theReadStream = NULL; } if (theWriteStream != NULL) { CFWriteStreamSetClient(theWriteStream, kCFStreamEventNone, NULL, NULL); CFWriteStreamUnscheduleFromRunLoop (theWriteStream, theRunLoop, kCFRunLoopDefaultMode); CFWriteStreamClose (theWriteStream); CFRelease (theWriteStream); theWriteStream = NULL; } // Close sockets. if (theSocket != NULL) { CFSocketInvalidate (theSocket); CFRelease (theSocket); theSocket = NULL; } if (theSocket6 != NULL) { CFSocketInvalidate (theSocket6); CFRelease (theSocket6); theSocket6 = NULL; } if (theSource != NULL) { CFRunLoopRemoveSource (theRunLoop, theSource, kCFRunLoopDefaultMode); CFRelease (theSource); theSource = NULL; } if (theSource6 != NULL) { CFRunLoopRemoveSource (theRunLoop, theSource6, kCFRunLoopDefaultMode); CFRelease (theSource6); theSource6 = NULL; } theRunLoop = NULL; // If the client has passed the connect/accept method, then the connection has at least begun. // Notify delegate that it is now ending. if (theFlags & kDidPassConnectMethod) { // Delay notification to give him freedom to release without returning here and core-dumping. if ([theDelegate respondsToSelector: @selector(onSocketDidDisconnect:)]) { //[theDelegate performSelector:@selector(onSocketDidDisconnect:) withObject:self afterDelay:0]; [theDelegate onSocketDidDisconnect:self]; } } // Clear flags. theFlags = 0x00; }

这段代码是 CocoaAsyncSocket 库中的 Socket 类的 close 方法。该方法关闭了当前连接并释放了相关资源，如果连接已经开始，则通知代理连接已经结束。其中 `[theDelegate onSocketDidDisconnect:self]` 代码行是通知代理连接已经断开的代码行，如果代理实现了 `onSocketDidDisconnect:` 方法，则该方法将被调用并传递当前的 Socket 实例作为参数。这个方法通常用于通知应用程序当前连接已经断开，以便应用程序可以再次尝试连接或者进行其他处理。