## iOS pickerWheels: 慢速方式 'mobile:selectPickerWheelValue' 示例 如果 `.setValue()`方法失效，那么 `mobile: selectPickerWheelValue` 方法可以作为一个暂时的解决方案。 这个移动端的方法允许选择下一个或上一个值。 所以有必要一直(使用这个方法)更改选中的值直到选中期望的值，或直到次数超时。 [参考文档](../../ios/ios-xctest-mobile-gestures.md#mobile-selectPickerWheelValue) ### 选择 PickerWheel 示例 ```java Assert.assertTrue(setPickerWheel("my_text", Order.NEXT), "setPickerWheel(): FAILED"); /** * Set PickerWheel value * * @param text the text to select * @param order the direction of search * @return result of set * @version java-client: 7.3.0 **/ public boolean setPickerWheel(String text, Order order) { System.out.println("setPickerWheel(): text: '" + text + "',order: '" + order + "'"); // always log your actions // find pickerWheel MobileElement pickerWheel = (MobileElement) driver.findElement(MobileBy.className("XCUIElementTypePickerWheel")); // limit search time to avoid infinite loops String resultText; Long startTime = System.currentTimeMillis(); do { resultText = pickerWheel.getText(); if (resultText.equals(text)) return true; if (!selectPickerWheelIOS(pickerWheel, order)) return false; } while (System.currentTimeMillis() < startTime + 60 * 1000); // 60 sec MAX return false; } /** * Performs set next or previous value * * @param el the pickerWheel element * @param order the order to select * @return result of select * @version java-client: 7.3.0 **/ public boolean selectPickerWheelIOS(MobileElement el, Order order) { System.out.println("selectPickerWheelIOS(): order: '" + order + "'"); // always log your actions HashMap<String, Object> params = new HashMap<>(); params.put("order", order.name().toLowerCase()); params.put("offset", "0.2"); // tap offset params.put("element", el.getId()); // pickerWheel element try { driver.executeScript("mobile: selectPickerWheelValue", params); return true; } catch (InvalidElementStateException e1) { System.out.println("selectPickerWheelIOS(): FAILED\n" + e1.getMessage()); } catch (InvalidArgumentException e2) { System.out.println("selectPickerWheelIOS(): FAILED\n" + e2.getMessage()); } return false; } public enum Order { NEXT, PREVIOUS; } ```