fix d.settings to self.settings

README.md

@@ -751,6 +751,9 @@ You can find all key code definitions at [Android KeyEvnet](https://developer.an
     d.swipe_ext("right", scale=0.9) # 默认0.9, 滑动距离为屏幕宽度的90%
     d.swipe_ext("right", box=(0, 0, 100, 100)) # 在 (0,0) -> (100, 100) 这个区域做滑动
 
+	# 实践发现上滑或下滑的时候，从中点开始滑动成功率会高一些
+	d.swipe_ext("up", scale=0.8) # 代码会vkk
+
     # 还可以使用Direction作为参数
     from uiautomator2 import Direction
     

uiautomator2/__init__.py

@@ -864,7 +864,7 @@ def screenshot(self, filename: Optional[str] = None, format="pillow"):
                 # Always fail in secure page
                 # 截图失败直接返回一个粉色的图片
                 # d.settings['default_screenshot'] =
-                if d.settings['fallback_to_blank_screenshot']:
+                if not self.settings['fallback_to_blank_screenshot']:
                     raise IOError("PIL.Image.open IOError", ex)
                 return Image.new("RGB", self.window_size(), (220, 120, 100))
         elif format == 'opencv':

uiautomator2/image.py

@@ -186,7 +186,7 @@ def draw_point(im: Image.Image, x: int, y: int) -> Image.Image:
     return im
 
 
-def imread(data):
+def imread(data) -> np.ndarray:
     """
     Args:
         data: local path or http url or data:image/base64,xxx

uiautomator2/swipe.py

@@ -23,6 +23,7 @@ def __call__(self,
             scale (float): percent of swipe, range (0, 1.0]
             box (tuple): None or [lx, ly, rx, ry]
             kwargs: used as kwargs in d.swipe
+
         Raises:
             ValueError
         """
@@ -40,6 +41,7 @@ def _swipe(_from, _to):
         h_offset = int(width * (1 - scale)) // 2
         v_offset = int(height * (1 - scale)) // 2
 
+        center = width//2, height//2
         left = lx + h_offset, ly + height // 2
         up = lx + width // 2, ly + v_offset
         right = rx - h_offset, ly + height // 2
@@ -50,8 +52,8 @@ def _swipe(_from, _to):
         elif direction == Direction.RIGHT:
             _swipe(left, right)
         elif direction == Direction.UP:
-            _swipe(bottom, up)
+            _swipe(center, up) # from center to top
         elif direction == Direction.DOWN:
-            _swipe(up, bottom)
+            _swipe(center, bottom) # from center to bottom
         else:
-            raise ValueError("Unknown direction:", direction)
+            raise ValueError("Unknown direction:", direction)