QSlider valueChanged

connect(ui.horizontalSlider,SIGNAL(valueChanged(int)),this,SLOT(slotSliderValueChange(int)));

QSlider inherits a comprehensive set of signals:

SignalDescription
valueChanged() Emitted when the slider's value has changed. The tracking() determines whether this signal is emitted during user interaction.
sliderPressed() Emitted when the user starts to drag the slider.
sliderMoved() Emitted when the user drags the slider.
sliderReleased() Emitted when the user releases the slider.
原文地址:https://www.cnblogs.com/herd/p/12548171.html