使用XCode的UI测试有没有什么办法，我们可以调整的iOS拾取轮生成的索引值或获得指标值的文本和调整选择器轮。 我是能够得到使用下面的代码的索引值。 但无法获得索引值的值。
let picker = app.pickerWheels.element(boundBy: 1).otherElements.count
print(picker)
let randomNumber = arc4random_uniform((UInt32(picker)))
print(randomNumber)
使用选择器轮的计数我生成从一个随机值。 随着randomNumber的索引号我想获得的价值。 有什么办法，我可以得到该指数的值和调整拾取轮到该值。
这是我如何处理我的XCTest UI测试框架采摘。
我有一个对象（ PickerState ），它可以代表一个选择器轮，其使用机械手轮的值，这是在格式填充的状态"Some value, 4 of 5" 。 该getPickerState方法将该值转换字符串成PickerState对象。
generateRandomNewPickerPosition生成拣货机移动到，确保选择器的当前位置没有返回随机指数。
然后我使用XCUIElement扩展方法移动到在随机生成的值changePickerSelection 。
/// Object to represent the state of a picker wheel.
class PickerState {
let selectedValue: String
let currentPosition: UInt
let maximumPosition: UInt
init(selectedValue: String, currentPosition: UInt, maximumPosition: UInt) {
self.selectedValue = selectedValue
self.currentPosition = currentPosition
self.maximumPosition = maximumPosition
}
}
/// Retrieve a PickerState object, given the value of a picker wheel.
func getPickerState(_ text: String) {
// Separate value
let splitText = text.componentsSeparatedByString(",")
let selectedValue = splitText[0]
// Extract numbers
var numbers = splitText[1].componentsSeparatedByCharactersInSet(NSCharacterSet.decimalDigitCharacterSet().invertedSet)
numbers = numbers.filter { $0 != "" }
let currentPosition = UInt(numbers[0])!
let maximumPosition = UInt(numbers[1])!
return PickerState(selectedValue: selectedValue, currentPosition: currentPosition, maximumPosition: maximumPosition)
}
/// Generate a new position (1-indexed) for the picker.
func generateRandomNewPickerPosition(pickerState: PickerState) -> UInt {
let valueCount = pickerState.maximumPosition
let random = UInt(arc4random_uniform(UInt32(valueCount - 1)))
let newPosition = ((pickerState.currentPosition + random) % valueCount) + 1
return newPosition
}
/// Move up/down the picker options until the given `selectionPosition` is reached.
func changePickerSelection(pickerWheel: XCUIElement, selectionPosition: UInt) {
// Select the new value
var valueSelected = false
while !valueSelected {
// Get the picker wheel's current position
if let pickerValue = pickerWheel.value {
let currentPosition = UInt(getPickerState(String(pickerValue)).currentPosition)
switch currentPosition.compared(to: selectionPosition) {
case .GreaterThan:
pickerWheel.selectPreviousOption()
case .LessThan:
pickerWheel.selectNextOption()
case .Equal:
valueSelected = true
}
}
}
}
/// Extend XCUIElement to contain methods for moving to the next/previous value of a picker.
extension XCUIElement {
/// Scrolls a picker wheel up by one option.
func selectNextOption() {
let startCoord = self.coordinateWithNormalizedOffset(CGVector(dx: 0.5, dy: 0.5))
let endCoord = startCoord.coordinateWithOffset(CGVector(dx: 0.0, dy: 30.0))
endCoord.tap()
}
/// Scrolls a picker wheel down by one option.
func selectPreviousOption() {
let startCoord = self.coordinateWithNormalizedOffset(CGVector(dx: 0.5, dy: 0.5))
let endCoord = startCoord.coordinateWithOffset(CGVector(dx: 0.0, dy: -30.0))
endCoord.tap()
}
}
let pickerWheel = app.pickerWheels.element(boundBy: 0)
let newPosition = generateRandomNewPickerPosition(getPickerState(pickerWheel.value))
changePickerSelection(pickerWheel, selectionPosition: newIndex)
