python Qt5 实战（一）按钮颜色

　　工作中，工具用到了python Qt5，涉及到了按钮颜色，这里就做个总结。也顺便给要用这块的同仁抛出来一个砖头，把大牛引出来做个指导。

一般设置按钮的颜色有三种表达：如下所示：具体的怎么使用，估计要看一下用例就清楚了。

QPushButton button1, button2, button3;
 
button1.setStyleSheet("background-color: red");
 
button2.setStyleSheet("background-color:#ff0000;");
 
button3.setStyleSheet("background-color:rgb(255,0,0)");

　　接下来上一个例子：

 import sys
 from PyQt5.QtWidgets import QApplication, QWidget, QPushButton
 from PyQt5.QtGui import QIcon
 from PyQt5.QtCore import pyqtSlot
 global ival
 class App(QWidget):
 
     def __init__(self):
         super().__init__()
         self.title = 'PyQt5 button color:https://www.cnblogs.com/dylancao/'
         self.left = 10
         self.top = 10
         self.width = 320
         self.height = 200
         self.initUI()
         global ival
         ival = 0
 
     def initUI(self):
         self.setWindowTitle(self.title)
         self.setGeometry(self.left, self.top, self.width, self.height)
 
         self.button = QPushButton('Color', self)
         self.button.setToolTip('This is an example button about color ')
         self.button.setStyleSheet("background-color: red")
         self.button.move(100,70)
         self.button.clicked.connect(self.on_click)
 
         self.show()
 
     @pyqtSlot()
     def on_click(self):
         global ival
         ival += 1
         if ival == 1:
                 self.button.setStyleSheet("background-color: red")
         elif ival == 2:
                 self.button.setStyleSheet("background-color: #ffff00;")
         elif ival == 3:
                 ival = 0
                 self.button.setStyleSheet("background-color: rgb(0,255,255)")
 
         print('PyQt5 button click:',ival)
 
 if __name__ == '__main__':
     app = QApplication(sys.argv)
     ex = App()
     sys.exit(app.exec_())

　　运行的结果：