From 509b1b2462bd7d2c72c5078c59d53339fa52cb96 Mon Sep 17 00:00:00 2001
From: Zpadger <31385823+Zpadger@users.noreply.github.com>
Date: Tue, 3 Dec 2019 16:15:12 +0800
Subject: [PATCH] =?UTF-8?q?=E4=BF=AE=E6=AD=A3=E4=BA=86=E7=AA=97=E5=8F=A3?=
 =?UTF-8?q?=E6=98=BE=E7=A4=BA=E7=9A=84bug?=
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cv2.waitKey(0)会导致第一个窗口一直显示，关闭该窗口之后程序还在堵塞状态，第二个窗口也无法正常显示。改用循环语句和条件语句结合来控制窗口的显示和关闭。
---
 Question_11_20/answers_py/answer_14.py | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/Question_11_20/answers_py/answer_14.py b/Question_11_20/answers_py/answer_14.py
index 334b2176..a74a3de0 100644
--- a/Question_11_20/answers_py/answer_14.py
+++ b/Question_11_20/answers_py/answer_14.py
@@ -58,10 +58,17 @@ def different_filter(img, K_size=3):
 
 # Save result
 cv2.imwrite("out_v.jpg", out_v)
-cv2.imshow("result", out_v)
-cv2.waitKey(0)
+cv2.imshow("result_v", out_v)
+while cv2.waitKey(100) != 27:# loop if not get ESC
+    if cv2.getWindowProperty('result_v',cv2.WND_PROP_VISIBLE) <= 0:
+        break
+cv2.destroyWindow('result_v')
 
 cv2.imwrite("out_h.jpg", out_h)
-cv2.imshow("result", out_h)
-cv2.waitKey(0)
+cv2.imshow("result_h", out_h)
+# loop if not get ESC or click x
+while cv2.waitKey(100) != 27:
+    if cv2.getWindowProperty('result_h',cv2.WND_PROP_VISIBLE) <= 0:
+        break
+cv2.destroyWindow('result_h')
 cv2.destroyAllWindows()