“””
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 sys
import time
qmut_1 = qmutex() # 创建线程锁
qmut_2 = qmutex()
qmut_3 = qmutex()
# 继承qthread
class 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
到此这篇关于python pyqt5多线程更新ui代码实例(防止界面卡死)的文章就介绍到这了,更多相关python pyqt5多线程更新u内容请搜索www.887551.com以前的文章或继续浏览下面的相关文章希望大家以后多多支持www.887551.com！
