我有以下基於另一個Stackoverflow問題的解決方案的腳本。我有一個tkinter圖形用戶界面,當拍攝新圖像時應該刷新。如何在GPIO按鈕按下後用Tkinter重新加載圖片?
class App(threading.Thread):
def __init__(self):
threading.Thread.__init__(self)
self.start()
def callback(self):
self.root.quit()
def run(self):
self.root = Tk()
self.root.geometry("{0}x{1}+0+0".format(800,800))
files = sorted(os.listdir(os.getcwd()),key=os.path.getmtime)
Label(self.root,image = ImageTk.PhotoImage(Image.open(files[-1]).resize((300, 200)))).grid(row = 1, column = 0)
Label(self.root, text=files[-1]).grid(row=0, column=0)
self.root.mainloop()
def update(self):
files = sorted(os.listdir(os.getcwd()),key=os.path.getmtime)
img1 = self.ImageTk.PhotoImage(self.Image.open(files[-1]).resize((300, 200)))
Label(self.root,image = img1).grid(row = 1, column = 0)
Label(self.root, text=files[-1]).grid(row=0, column=0)
self.root.update()
app = App()
app.update()
我得到這個錯誤:
Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/PIL/ImageTk.py", line 176, in paste
tk.call("PyImagingPhoto", self.__photo, block.id)
_tkinter.TclError: invalid command name "PyImagingPhoto"
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "./mainloop.py", line 98, in <module>
app.update()
File "./mainloop.py", line 79, in update
img1 = ImageTk.PhotoImage(Image.open(files[-1]).resize((300, 200)))
File "/usr/lib/python3/dist-packages/PIL/ImageTk.py", line 115, in __init__
self.paste(image)
File "/usr/lib/python3/dist-packages/PIL/ImageTk.py", line 182, in paste
_imagingtk.tkinit(tk.interpaddr(), 1)
OverflowError: Python int too large to convert to C ssize_t
我到底做錯了什麼?使用文件名創建標籤確實有效。文件名是一個有效的文件。當腳本不在線程內部時,該腳本可以工作。線程部分。當按下Raspberry GPIO按鈕時,我想用最新的圖片更新屏幕(腳本將拍攝帶有camara的新照片)。所以屏幕應該加載最新拍攝的照片。