Python Pyqt5多线程更新UI代码的实例分析，针对这个问题，这篇文章详细介绍了相对应的分析和解答，希望可以帮助更多想解决这个问题的小伙伴找到更简单易行的方法。
"""
在编写GUI界面中，通常用会有一些按钮，点击后触发事件，
比如去下载一个文件或者做一些操作，
这些操作会耗时，如果不能及时结束，主线程将会阻塞，
这样界面就会出现未响应的状态，因此必须使用多线程来解决这个问题。
"""
代码实例
from PyQt5.Qt import (QApplication, QWidget, QPushButton,QThread,QMutex,pyqtSignal)import sysimport time qmut_1 = QMutex() # 创建线程锁qmut_2 = QMutex()qmut_3 = QMutex()# 继承QThreadclass Thread_1(QThread): # 线程1 def __init__(self): super().__init__() def run(self): qmut_1.lock() # 加锁 values = [1, 2, 3, 4, 5,6,7,8,9,10] print("==== Thread_1 ====") for i in values: print("Thread_1:",i) time.sleep(0.5) # 休眠 qmut_1.unlock() # 解锁 class Thread_2(QThread): # 线程2 _signal =pyqtSignal() def __init__(self): super().__init__() def run(self): # qmut_2.lock() # 加锁 values = ["a", "b", "c", "d", "e","f","g","h","i","j","k"] print("==== Thread_2 ====") for i in values: print("Thread_2:",i) time.sleep(0.5) # qmut_2.unlock() # 解锁 self._signal.emit() class Thread_3(QThread): # 线程2 _signal =pyqtSignal() def __init__(self): super().__init__() def run(self): qmut_3.lock() # 加锁 values = ["a", "b", "c", "d", "e","f","g","h","i","j","k"] print("==== Thread_3 ====") for i in values: print("Thread_3:",i) time.sleep(0.5) qmut_3.unlock() # 解锁 self._signal.emit() #执行完毕后，释放信号 class Thread_01(QThread): # 线程1 def __init__(self): super().__init__() def run(self): values = [1, 2, 3, 4, 5] print("==== Thread_01 ====") for i in values: print("Thread_01:",i) time.sleep(0.5) # 休眠 class Thread_02(QThread): # 线程2 def __init__(self): super().__init__() def run(self): values = ["a", "b", "c", "d", "e"] print("==== Thread_02 ====") for i in values: print("Thread_02:",i) time.sleep(0.5) class MyWin(QWidget): def __init__(self): super().__init__() # 按钮初始化 self.btn_01 = QPushButton('按钮_每点一次运行一次', self) self.btn_01.move(80, 40) self.btn_01.clicked.connect(self.click_01) # 绑定槽函数 self.btn_02 = QPushButton('按钮_每点一次运行一次', self) self.btn_02.move(80, 80) self.btn_02.clicked.connect(self.click_02) # 绑定槽函数 self.btn_1 = QPushButton('按钮_线程锁_多次点击，依次执行(滞后感)', self) self.btn_1.move(80, 120) self.btn_1.clicked.connect(self.click_1) # 绑定槽函数 self.btn_2 = QPushButton('按钮_线程锁_收到完成信号后才能再次点击', self) self.btn_2.move(80, 160) self.btn_2.clicked.connect(self.click_2) # 绑定槽函数 self.btn_3 = QPushButton('按钮_线程锁_收到完成信号后再次执行', self) self.btn_3.move(80, 200) self.btn_3.clicked.connect(self.click_3) # 绑定槽函数 def click_01(self): self.thread_01 = Thread_01() # 创建线程 self.thread_01.start() # 开始线程 def click_02(self): self.thread_02 = Thread_02() # 创建线程 self.thread_02.start() # 开始线程 def click_1(self): self.thread_1 = Thread_1() # 创建线程 self.thread_1.start() # 开始线程 def click_2(self): self.btn_2.setEnabled(False) self.thread_2 = Thread_2() self.thread_2._signal.connect(self.set_btn_2) #信号连接，如果收到信号，就执行对应的函数 self.thread_2.start() def click_3(self): self.btn_3.setEnabled(False) self.thread_3 = Thread_3() self.thread_3._signal.connect(self.set_btn_3) #信号连接，如果收到信号，就执行对应的函数 self.thread_3.start() def set_btn_2(self): self.btn_2.setEnabled(True) def set_btn_3(self): self.btn_3.setEnabled(True) if __name__ == "__main__": app = QApplication(sys.argv) myshow = MyWin() myshow.setWindowTitle("多线程演示") myshow.setMinimumHeight(500) myshow.setMinimumWidth(500) myshow.show() sys.exit(app.exec_())运行结果
==== Thread_01 ====
Thread_01: 1
Thread_01: 2
Thread_01: 3
Thread_01: 4
Thread_01: 5
==== Thread_02 ====
Thread_02: a
Thread_02: b
Thread_02: c
Thread_02: d
Thread_02: e
==== Thread_1 ====
Thread_1: 1
Thread_1: 2
Thread_1: 3
Thread_1: 4
Thread_1: 5
Thread_1: 6
Thread_1: 7
Thread_1: 8
Thread_1: 9
==== Thread_2 ====
Thread_2: a
Thread_1: 10
Thread_2: b
Thread_2: c
Thread_2: d
==== Thread_3 ====
Thread_3: a
Thread_2: e
Thread_3: b
Thread_2: f
Thread_3: c
Thread_2: g
Thread_3: d
Thread_2: h
Thread_3: e
Thread_2: i
Thread_3: f
Thread_2: j
Thread_3: g
Thread_2: k
Thread_3: h
运行过程
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