XCTest UI测试：只在鼠标滑动时找到按钮

Question

Xcode 8.2，IOS10.2

因此，当我启动UITest并进入屏幕时，我使用：

app.tables.element.swipeUp();

或

app.swipeUp(); 

无法找到屏幕上显示的元素，代码停在：

app.buttons["dingdanBtn"].tap();

但如果我使用鼠标滚动/向上滑动（单击，按住并向上移动）

XCTest可以找到元素吗？

有人认为这是一个错误，或者我做错了什么？

如果我用过

app.swipeUp() 

print(app.buttons.debugDescription); 

输出是：

Find: Target Application 0x6080000ad620
  Output: {
    Application 0x60800017e840: {{0.0, 0.0}, {414.0, 736.0}}, label: '纳豆行'
  }
  ↪︎Find: Descendants matching type Button
    Output: {
      Button 0x60800017e180: traits: 8589934593, {{20.0, 31.0}, {20.7, 20.5}}, label: 'da ren list backBtn'
      Button 0x60800017ca40: traits: 8589934593, {{114.5, 1140.8}, {184.9, 33.1}}, label: '我知道了'
      Button 0x60800017ea80: traits: 8589934593, {{44.2, 1140.8}, {122.0, 33.1}}, label: '否'
      Button 0x60800017e9c0: traits: 8589934593, {{247.8, 1140.8}, {122.0, 33.1}}, label: '是'
      Button 0x60800017d1c0: traits: 8589934593, {{114.5, 1140.8}, {184.9, 33.1}}, label: '我知道了'
    }

如果我没有使用：

app.swipeUp()

但是用我的鼠标滚动，输出是：

Find: Target Application 0x6000000b5900
  Output: {
    Application 0x600000366300: {{0.0, 0.0}, {414.0, 736.0}}, label: '纳豆行'
  }
  ↪︎Find: Descendants matching type Button
    Output: {
      Button 0x600000366840: traits: 8589934593, {{20.0, 31.0}, {20.7, 20.5}}, label: 'da ren list backBtn'
      Button 0x600000368ac0: traits: 8589934593, {{259.4, 504.6}, {66.2, 22.1}}, label: 'updateButton'
      Button 0x600000368b80: traits: 8589934593, {{336.7, 504.6}, {66.2, 22.1}}, label: 'dingdanBtn'
      Button 0x608000366780: traits: 8589934593, {{0.0, 0.0}, {77.3, 27.6}}, label: 'updateButton'
      Button 0x608000366300: traits: 8589934593, {{0.0, 0.0}, {77.3, 27.6}}, label: 'updateButton'
      Button 0x608000367980: traits: 8589934593, {{0.0, 0.0}, {77.3, 27.6}}, label: 'updateButton'
      Button 0x608000365880: traits: 8589934593, {{0.0, 0.0}, {77.3, 27.6}}, label: 'updateButton'
      Button 0x60800036b4c0: traits: 8589934593, {{0.0, 0.0}, {77.3, 27.6}}, label: 'updateButton'
      Button 0x60800036a740: traits: 8589934593, {{0.0, 0.0}, {77.3, 27.6}}, label: 'updateButton'
      Button 0x60800036b1c0: traits: 8589934593, {{0.0, 0.0}, {77.3, 27.6}}, label: 'updateButton'
      Button 0x60800036c540: traits: 8589934593, {{0.0, 0.0}, {77.3, 27.6}}, label: 'updateButton'
      Button 0x608000368040: traits: 8589934593, {{0.0, 0.0}, {77.3, 27.6}}, label: 'updateButton'
      Button 0x60800036c900: traits: 8589934593, {{0.0, 0.0}, {77.3, 27.6}}, label: 'updateButton'
      Button 0x60800036bd00: traits: 8589934593, {{114.5, 1140.8}, {184.9, 33.1}}, label: '我知道了'
      Button 0x60800036cfc0: traits: 8589934593, {{44.2, 1140.8}, {122.0, 33.1}}, label: '否'
      Button 0x60800036cf00: traits: 8589934593, {{247.8, 1140.8}, {122.0, 33.1}}, label: '是'
      Button 0x60800036c180: traits: 8589934593, {{114.5, 1140.8}, {184.9, 33.1}}, label: '我知道了'
    }

我正在寻找“dingdanBtn”按钮