2. UITest相关APIs

1. XCUIApplication

这是你正在测试的应用的代理。它能让你启动应用，这样你就能执行测试了。它每次都会新起一个进程，这会多花一些时间，但是能保证测试应用时的状态是干净的，这样你需要处理的变量就少了些。

- (void)launch;//启动应用。如果目标应用已运行，首先终止应用，然后再次启动应用。
- (void)terminate;//关闭应用。
@property (nonatomic, copy) NSArray <NSString *> *launchArguments;//数组对象，保存启动参数。
@property (nonatomic, copy) NSDictionary <NSString *, NSString *> *launchEnvironment;//字典对象，保存启动环境变量

2. XCUIElement

这是你正在测试的应用中UI元素的代理。每个元素都有类型和标识符，结合二者就能找到应用中的UI元素。所有的元素都会嵌套在代表你的应用的树中。

@property (readonly) BOOL exists;
这个控件是否存在（不管被遮挡或者不在当前屏幕内都是YES）

@property (readonly, getter = isHittable) BOOL hittable;
这个控件是否能找到一个点可以点击

- (XCUIElementQuery *)descendantsMatchingType :(XCUIElementType)type;
在这个元素里按照固定的类型寻找其所有的子元素，如：
在Table的Cell里寻找所有的子Button

locButton = [cell descendantsMatchingType:XCUIElementTypeButton];

- (XCUIElementQuery *)childrenMatchingType :(XCUIElementType)type;
在这个元素里按照固定的类型寻找其所有直接的子元素（即无法查找子元素的子元素），和上一个方法类似。

- (XCUICoordinate *)coordinateWithNormalizedOffset :(CGVector)normalizedOffset;

在这个控件里根据CGVector的比例返回一个点。

XCUICoordinate *bot = [window coordinateWithNormalizedOffset:CGVectorMake(0.5, 0.5)];//在Window中X比例为0.5,Y比例为0.5的一个点

@property (readonly, copy) NSString *debugDescription;

上面已经叙述过了，就是查询的调试信息。

- (void)typeText :(NSString *)text;

可以用这个方法对UITextField 和 UITextView等输入，但调用之前需要确保键盘已经弹出，否则会出错。

- (void)tap;
单击这个控件一次

- (void)doubleTap;
双击这个控件一次

- (void)twoFingerTap;
双指点击

- (void)tapWithNumberOfTaps :(NSUInteger)numberOfTaps numberOfTouches :(NSUInteger)numberOfTouches;

可以指定点击几次，每次用几个手指

- (void)pressForDuration :(NSTimeInterval)duration;
长按手势，可以指定长按的时间。

- (void)pressForDuration :(NSTimeInterval)duration thenDragToElement :(XCUIElement *)otherElement;
先长按然后再拖动到另一个元素的位置，多用于TableView的MoveCell。

- (void)swipeUp;
- (void)swipeDown;
- (void)swipeLeft;
- (void)swipeRight;
上下左右滑动的手势。

- (void)pinchWithScale :(CGFloat)scale velocity :(CGFloat)velocity;
Pinch的手势。

- (void)rotate :(CGFloat)rotation withVelocity :(CGFloat)velocity;
旋转的手势。

- (void)adjustToNormalizedSliderPosition :(CGFloat)normalizedSliderPosition;
设置一个Slider当前的Value值，设置的值的范围在[0 , 1]。

@property (readonly) CGFloat normalizedSliderPosition;
返回一个Slider当前Value的值，值的范围在[0 , 1]。

- (void)adjustToPickerWheelValue :(NSString *)pickerWheelValue;
设置一个PikerView的值为多少。

3. XCUIElementAttributes

/*! The accessibility identifier. */
@property (readonly) NSString *identifier;

/*! The frame of the element in the screen coordinate space. */
@property (readonly) CGRect frame;

/*! The raw value attribute of the element. Depending on the element, the actual type can vary. */
@property (readonly, nullable) id value;

/*! The title attribute of the element. */
@property (readonly, copy) NSString *title;

/*! The label attribute of the element. */
@property (readonly, copy) NSString *label;

/*! The type of the element. /seealso XCUIElementType. */
@property (readonly) XCUIElementType elementType;

/*! Whether or not the element is enabled for user interaction. */
@property (readonly, getter = isEnabled) BOOL enabled;

/*! The horizontal size class of the element. */
@property (readonly) XCUIUserInterfaceSizeClass horizontalSizeClass;

/*! The vertical size class of the element. */
@property (readonly) XCUIUserInterfaceSizeClass verticalSizeClass;

/*! The value that is displayed when the element has no value. */
@property (readonly, nullable) NSString *placeholderValue;

/*! Whether or not the element is selected. */
@property (readonly, getter = isSelected) BOOL selected;

#if TARGET_OS_TV
/*! Whether or not the elment has UI focus. */
@property (readonly) BOOL hasFocus;

4. XCUIElementTypeQueryProvider协议

@property (readonly, copy) XCUIElementQuery *touchBars;
@property (readonly, copy) XCUIElementQuery *groups;
@property (readonly, copy) XCUIElementQuery *windows;
@property (readonly, copy) XCUIElementQuery *sheets;
@property (readonly, copy) XCUIElementQuery *drawers;
@property (readonly, copy) XCUIElementQuery *alerts;
@property (readonly, copy) XCUIElementQuery *dialogs;
@property (readonly, copy) XCUIElementQuery *buttons;
@property (readonly, copy) XCUIElementQuery *radioButtons;
@property (readonly, copy) XCUIElementQuery *radioGroups;
@property (readonly, copy) XCUIElementQuery *checkBoxes;
@property (readonly, copy) XCUIElementQuery *disclosureTriangles;
@property (readonly, copy) XCUIElementQuery *popUpButtons;
@property (readonly, copy) XCUIElementQuery *comboBoxes;
@property (readonly, copy) XCUIElementQuery *menuButtons;
@property (readonly, copy) XCUIElementQuery *toolbarButtons;
@property (readonly, copy) XCUIElementQuery *popovers;
@property (readonly, copy) XCUIElementQuery *keyboards;
@property (readonly, copy) XCUIElementQuery *keys;
@property (readonly, copy) XCUIElementQuery *navigationBars;
@property (readonly, copy) XCUIElementQuery *tabBars;
@property (readonly, copy) XCUIElementQuery *tabGroups;
@property (readonly, copy) XCUIElementQuery *toolbars;
@property (readonly, copy) XCUIElementQuery *statusBars;
@property (readonly, copy) XCUIElementQuery *tables;
@property (readonly, copy) XCUIElementQuery *tableRows;
@property (readonly, copy) XCUIElementQuery *tableColumns;
@property (readonly, copy) XCUIElementQuery *outlines;
@property (readonly, copy) XCUIElementQuery *outlineRows;
@property (readonly, copy) XCUIElementQuery *browsers;
@property (readonly, copy) XCUIElementQuery *collectionViews;
@property (readonly, copy) XCUIElementQuery *sliders;
@property (readonly, copy) XCUIElementQuery *pageIndicators;
@property (readonly, copy) XCUIElementQuery *progressIndicators;
@property (readonly, copy) XCUIElementQuery *activityIndicators;
@property (readonly, copy) XCUIElementQuery *segmentedControls;
@property (readonly, copy) XCUIElementQuery *pickers;
@property (readonly, copy) XCUIElementQuery *pickerWheels;
@property (readonly, copy) XCUIElementQuery *switches;
@property (readonly, copy) XCUIElementQuery *toggles;
@property (readonly, copy) XCUIElementQuery *links;
@property (readonly, copy) XCUIElementQuery *images;
@property (readonly, copy) XCUIElementQuery *icons;
@property (readonly, copy) XCUIElementQuery *searchFields;
@property (readonly, copy) XCUIElementQuery *scrollViews;
@property (readonly, copy) XCUIElementQuery *scrollBars;
@property (readonly, copy) XCUIElementQuery *staticTexts;
@property (readonly, copy) XCUIElementQuery *textFields;
@property (readonly, copy) XCUIElementQuery *secureTextFields;
@property (readonly, copy) XCUIElementQuery *datePickers;
@property (readonly, copy) XCUIElementQuery *textViews;
@property (readonly, copy) XCUIElementQuery *menus;
@property (readonly, copy) XCUIElementQuery *menuItems;
@property (readonly, copy) XCUIElementQuery *menuBars;
@property (readonly, copy) XCUIElementQuery *menuBarItems;
@property (readonly, copy) XCUIElementQuery *maps;
@property (readonly, copy) XCUIElementQuery *webViews;
@property (readonly, copy) XCUIElementQuery *steppers;
@property (readonly, copy) XCUIElementQuery *incrementArrows;
@property (readonly, copy) XCUIElementQuery *decrementArrows;
@property (readonly, copy) XCUIElementQuery *tabs;
@property (readonly, copy) XCUIElementQuery *timelines;
@property (readonly, copy) XCUIElementQuery *ratingIndicators;
@property (readonly, copy) XCUIElementQuery *valueIndicators;
@property (readonly, copy) XCUIElementQuery *splitGroups;
@property (readonly, copy) XCUIElementQuery *splitters;
@property (readonly, copy) XCUIElementQuery *relevanceIndicators;
@property (readonly, copy) XCUIElementQuery *colorWells;
@property (readonly, copy) XCUIElementQuery *helpTags;
@property (readonly, copy) XCUIElementQuery *mattes;
@property (readonly, copy) XCUIElementQuery *dockItems;
@property (readonly, copy) XCUIElementQuery *rulers;
@property (readonly, copy) XCUIElementQuery *rulerMarkers;
@property (readonly, copy) XCUIElementQuery *grids;
@property (readonly, copy) XCUIElementQuery *levelIndicators;
@property (readonly, copy) XCUIElementQuery *cells;
@property (readonly, copy) XCUIElementQuery *layoutAreas;
@property (readonly, copy) XCUIElementQuery *layoutItems;
@property (readonly, copy) XCUIElementQuery *handles;
@property (readonly, copy) XCUIElementQuery *otherElements;