我正在尝试从import org.springframework.web.socket.config.annotation.EnableWebSocket;
import org.springframework.web.socket.config.annotation.WebSocketConfigurer;
import org.springframework.web.socket.config.annotation.WebSocketHandlerRegistry;
@Configuration
@EnableWebSocket
public class WebSocketConfig implements WebSocketConfigurer {
@Override
public void registerWebSocketHandlers(WebSocketHandlerRegistry registry) {
registry.addHandler(myHandler(), "/myHandler").setAllowedOrigins("*");
}
@Bean
public WebSocketHandler myHandler() {
return new MyHandler();
}
}
呈现一个弹出框，哪个锚点是UIMenuItem中所选文本的矩形。我有以下代码：
textView应用程序在行func pickColor(sender: UIMenuItem) {
let range = noteTextView.selectedTextRange
let beginningOfSelection = noteTextView.caretRect(for: (range?.start)!)
let endOfSelection = noteTextView.caretRect(for: (range?.end)!)
let storyboard: UIStoryboard = UIStoryboard(name: "ColorPicker", bundle: nil)
let colorVC = storyboard.instantiateViewController(withIdentifier: "ColorPickerViewController") as UIViewController
colorVC.modalPresentationStyle = .popover
let popover: UIPopoverPresentationController = colorVC.popoverPresentationController!
popover.sourceView = noteTextView
popover.sourceRect = CGRect(x: (beginningOfSelection.origin.x + endOfSelection.origin.x)/2, y: (beginningOfSelection.origin.y + beginningOfSelection.size.height)/2, width: 0, height: 0)
present(colorVC, animated: true, completion: nil)
}
中崩溃。谁能告诉我这里发生了什么？谢谢！ ：）