新手上路，整了一个非常单纯的小工程（拿 ai 写的），然后在 ui 设计时右键 Pushbutton 转到槽时被这个问题干碎了，一头雾水，甚至不知道怎么排除错误。

编译日志如下： 00:46:54: 为项目 untitled1 执行步骤 ... 00:46:54: 正在启动 "G:\QtCommunity\Tools\CMake_64\bin\cmake.exe" --build G:/Qtfile/QtProgram/untitled1/build/Qt_6_9_1_Clang_arm64_v8a-Debug --target all

[0/2 0.0/sec] Re-checking globbed directories... [1/9 0.4/sec] Automatic MOC and UIC for target untitled1 [2/9 0.7/sec] Running AUTOMOC file extraction for target untitled1 [3/9 0.9/sec] Running moc --collect-json for target untitled1 [4/9 0.6/sec] Building CXX object CMakeFiles/untitled1.dir/untitled1_autogen/mocs_compilation.cpp.o [5/9 0.8/sec] Building CXX object CMakeFiles/untitled1.dir/main.cpp.o [6/9 0.9/sec] Building CXX object CMakeFiles/untitled1.dir/mainwindow.cpp.o [7/9 0.9/sec] Linking CXX shared module libuntitled1_arm64-v8a.so [8/9 1.0/sec] Copying untitled1 binary to apk folder 00:47:03: The command "G:\QtCommunity\Tools\CMake_64\bin\cmake.exe --build G:/Qtfile/QtProgram/untitled1/build/Qt_6_9_1_Clang_arm64_v8a-Debug --target all" finished successfully. 00:47:03: 正在启动 "G:\QtCommunity\6.9.1\mingw_64\bin\androiddeployqt.exe" --input G:/Qtfile/QtProgram/untitled1/build/Qt_6_9_1_Clang_arm64_v8a-Debug/android-untitled1-deployment-settings.json --output G:/Qtfile/QtProgram/untitled1/build/Qt_6_9_1_Clang_arm64_v8a-Debug/android-build-untitled1 --android-platform android-35 --jdk G:/jdk17 --gradle

Generating Android Package Input file: G:/Qtfile/QtProgram/untitled1/build/Qt_6_9_1_Clang_arm64_v8a-Debug/android-untitled1-deployment-settings.json Output directory: G:/Qtfile/QtProgram/untitled1/build/Qt_6_9_1_Clang_arm64_v8a-Debug/android-build-untitled1/ Application binary: untitled1 Android build platform: android-35 Install to device: No Skipping createRCC Starting a Gradle Daemon, 1 incompatible and 9 stopped Daemons could not be reused, use --status for details

Task :preBuild UP-TO-DATE Task :preDebugBuild UP-TO-DATE Task :mergeDebugNativeDebugMetadata NO-SOURCE Task :javaPreCompileDebug Task :generateDebugResValues Task :checkDebugAarMetadata Task :mapDebugSourceSetPaths Task :generateDebugResources Task :mergeDebugResources Task :packageDebugResources Task :createDebugCompatibleScreenManifests Task :extractDeepLinksDebug Task :parseDebugLocalResources

Task :processDebugMainManifest package="org.qtproject.example.untitled1" found in source AndroidManifest.xml: G:\Qtfile\QtProgram\untitled1\build\Qt_6_9_1_Clang_arm64_v8a-Debug\android-build-untitled1\AndroidManifest.xml. Setting the namespace via the package attribute in the source AndroidManifest.xml is no longer supported, and the value is ignored. Recommendation: remove package="org.qtproject.example.untitled1" from the source AndroidManifest.xml: G:\Qtfile\QtProgram\untitled1\build\Qt_6_9_1_Clang_arm64_v8a-Debug\android-build-untitled1\AndroidManifest.xml.

Task :processDebugManifest Task :mergeDebugShaders Task :compileDebugShaders NO-SOURCE Task :generateDebugAssets UP-TO-DATE Task :mergeDebugAssets Task :compressDebugAssets Task :processDebugJavaRes NO-SOURCE Task :checkDebugDuplicateClasses Task :mergeDebugJniLibFolders Task :mergeLibDexDebug Task :validateSigningDebug Task :writeDebugAppMetadata Task :writeDebugSigningConfigVersions Task :processDebugManifestForPackage Task :mergeDebugNativeLibs Task :mergeDebugJavaResource Task :processDebugResources Task :compileDebugJavaWithJavac Task :dexBuilderDebug Task :desugarDebugFileDependencies Task :mergeProjectDexDebug Task :stripDebugDebugSymbols Task :mergeExtDexDebug Task :packageDebug Task :createDebugApkListingFileRedirect Task :assembleDebug

[Incubating] Problems report is available at: file:///G:/Qtfile/QtProgram/untitled1/build/Qt_6_9_1_Clang_arm64_v8a-Debug/android-build-untitled1/build/reports/problems/problems-report.html

Deprecated Gradle features were used in this build, making it incompatible with Gradle 9.0.

You can use '--warning-mode all' to show the individual deprecation warnings and determine if they come from your own scripts or plugins.

For more on this, please refer to https://docs.gradle.org/8.12/userguide/command_line_interface.html#sec:command_line_warnings in the Gradle documentation.

BUILD SUCCESSFUL in 23s 33 actionable tasks: 33 executed Android package built successfully in 28.935 ms. -- File: G:/Qtfile/QtProgram/untitled1/build/Qt_6_9_1_Clang_arm64_v8a-Debug/android-build-untitled1//build/outputs/apk/debug/android-build-untitled1-debug.apk 00:47:32: The command "G:\QtCommunity\6.9.1\mingw_64\bin\androiddeployqt.exe --input G:/Qtfile/QtProgram/untitled1/build/Qt_6_9_1_Clang_arm64_v8a-Debug/android-untitled1-deployment-settings.json --output G:/Qtfile/QtProgram/untitled1/build/Qt_6_9_1_Clang_arm64_v8a-Debug/android-build-untitled1 --android-platform android-35 --jdk G:/jdk17 --gradle --gdbserver" finished successfully. 00:47:32: Elapsed time: 00:38.

mainwindow.h 如下： #ifndef MAINWINDOW_H #define MAINWINDOW_H

#include <QMainWindow> #include <QLabel>

class MainWindow : public QMainWindow { Q_OBJECT

public: MainWindow(QWidget *parent = nullptr); ~MainWindow();

protected: void mousePressEvent(QMouseEvent *event) override;

private: QLabel *label; };

#endif // MAINWINDOW_H

mainwindow.cpp 如下： #include "mainwindow.h" #include <QMouseEvent> #include <QFont> #include <QDebug>

MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent) { // 设置窗口大小 resize(400, 300);

// 创建 label 但先不显示文字
label = new QLabel(this);
label->setText("");
label->setAlignment(Qt::AlignCenter);
label->setGeometry(rect());  // 占满整个窗口
label->setFont(QFont("Arial", 24));

}

MainWindow::~MainWindow() { }

void MainWindow::mousePressEvent(QMouseEvent *event) { Q_UNUSED(event); label->setText("Hello World"); qDebug() << "屏幕被点击，显示 Hello World"; }