【Qt 避免QPushButton短时间点击多次导致槽函数响应多次的方法】

先说解决方案，在对应的槽函数中写入以下代码段

void on_pushButton_clicked()
{ui->pushButton->blockSignals(true);{//耗时操作//.....QApplication::processEvents();}    ui->pushButton->blockSignals(false);
}

应用场景：在项目中，我们可能会遇到以下场景，当我们快速多次点击按钮，并不希望在槽函数响应多次（槽函数第一次还未执行完成，累积了触发次数），我们不希望在槽函数未执行完成时，累积去再次触发槽函数，通过以上方法即可解决。
附blockSignals函数方法说明

bool QObject::blockSignals(bool block)
If block is true, signals emitted by this object are blocked (i.e., emitting a signal will not invoke anything connected to it). If block is false, no such blocking will occur.
The return value is the previous value of signalsBlocked().
Note that the destroyed() signal will be emitted even if the signals for this object have been blocked.
Signals emitted while being blocked are not buffered.
See also signalsBlocked() and QSignalBlocker.

即当block为true时，控件发出的信号会被阻塞。