最后在 XCUI TestCase 期间停止在 UITableView 上滚动

Question

在我的 UITableView 中有超过 10 行。我想在 UITestCase 运行.

时滚动到最后一行

我写了下面的代码来滚动到最后一行。

-(void)scrollToElement:(XCUIElement *)element application:(XCUIApplication *)app{
    while ([self visible:element withApplication:app]) {
        XCUIElement *searchResultTableView = app.tables[@"searchResultView"];
        XCUICoordinate *startCoord = [searchResultTableView coordinateWithNormalizedOffset:CGVectorMake(0.5, 0.5)];
        XCUICoordinate *endCoord = [startCoord coordinateWithOffset:CGVectorMake(0.0, -262)];
        [startCoord pressForDuration:0.01 thenDragToCoordinate:endCoord];
    }
}
-(BOOL)visible:(XCUIElement *)element withApplication:(XCUIApplication *)app{
    if (element.exists && !CGRectIsEmpty(element.frame) && element.isHittable) {
        return CGRectContainsRect([app.windows elementBoundByIndex:0].frame, element.frame);
    } else {
        return FALSE;
    }
}

我已经通过下面的代码

在我的UITestCase方法之一中调用了上面的方法

XCUIElement *searchResultTableView = app.tables[@"searchResultView"];
[self waitForElementToAppear:searchResultTableView withTimeout:30];


XCUIElement *table = [app.tables elementBoundByIndex:0];
XCUIElement *lastCell = [table.cells elementBoundByIndex:table.cells.count - 1];
[self scrollToElement:lastCell application:app];

通过这段代码，我可以滚动到最后一行，但在到达最后一行后，它继续滚动意味着无法停止滚动。

请帮我滚动到最后一行然后它应该停止滚动以便我可以执行下一个动作事件。

我参考了 Whosebug 个答案，但 none 个答案符合我的要求。

提前致谢。

Answer 1

我在我的一个项目中遇到过类似的问题。因为我想通过 TestKit 框架测试 "Load More" 功能。

下面是实现相同场景的一些解决方法。

//app           : is your current instance of appliaction
//listTable     : is a Table which you've found via accessibility identifier
//loadMoreTest  : is a parameter to determine whether code should perform test for loadmore feature or not

- (void)testScrollableTableForApplication:(XCUIApplication *)app
                                 forTable:(XCUIElement *)listTable
                         withLoadMoreTest:(BOOL)loadMoreTest {

    [listTable accessibilityScroll:UIAccessibilityScrollDirectionUp];
    [listTable swipeUp];

    if (loadMoreTest) {
        __block BOOL isLoadMoreCalled;
        __block XCUIElement *lastCell;
        __block __weak void (^load_more)();
        void (^loadMoreCall)();
        load_more = loadMoreCall = ^() {
            XCUIElementQuery *tablesQuery = app.tables;
            XCUIElementQuery *cellQuery = [tablesQuery.cells containingType:XCUIElementTypeCell identifier:@"LoadMoreCell"];
            lastCell = cellQuery.element;
            if ([lastCell elementIsWithinWindowForApplication:app]) {
                [self waitForElementToAppear:lastCell withTimeout:2];
                [lastCell tap];
                isLoadMoreCalled = true;
                [self wait:2];
            }
            [listTable swipeUp];
            if (!isLoadMoreCalled) {
                load_more();
            }
        };
        loadMoreCall();
    }
}


- (void)waitForElementToAppear:(XCUIElement *)element withTimeout:(NSTimeInterval)timeout
{
    NSUInteger line = __LINE__;
    NSString *file = [NSString stringWithUTF8String:__FILE__];

    NSPredicate *existsPredicate = [NSPredicate predicateWithFormat:@"exists == 1"];
    [self expectationForPredicate:existsPredicate evaluatedWithObject:element handler:nil];

    [self waitForExpectationsWithTimeout:timeout handler:^(NSError * _Nullable error) {
        if (error != nil) {
            NSString *message = [NSString stringWithFormat:@"Failed to find %@ after %f seconds",element,timeout];
            [self recordFailureWithDescription:message inFile:file atLine:line expected:YES];
        }
    }];
}

为 XCUIElement 创建一个类别 XCUIElement+Helper.m 并将其导入到您各自的测试中 class.

#import <XCTest/XCTest.h>

@interface XCUIElement (Helper)

/// Check whether current XCUIElement is within current window or not
- (BOOL)elementIsWithinWindowForApplication:(XCUIApplication *)app ;

@end

@implementation XCUIElement (Helper)

/// Check whether current XCUIElement is within current window or not
/*
@description: we need to check particular element's frame and window's frame is intersecting or not, to get perfectly outcome whether element is currently visible on screen or not, because if element has not yet appeared on screen then also the flag frame, exists and hittable can become true
*/
- (BOOL)elementIsWithinWindowForApplication:(XCUIApplication *)app {
    if (self.exists && !CGRectIsEmpty(self.frame) && self.hittable)
        return CGRectContainsRect(app.windows.allElementsBoundByIndex[0].frame, self.frame);
    else
        return false;
}

@end

要获取 "Load More" 单元格，我已将

cell.accessibilityIdentifier = @"LoadMoreCell";

其余代码是 testScrollableTableForApplication 中的递归函数，使 Tableview 滚动到底部，这样我就可以访问加载更多单元格（在你的情况下是最后一个单元格）。然后我执行 Tap 操作以从服务器获取新记录。然后我再次滚动 Table 以验证是否已从服务器获取新记录。

Tip：可以用do while或while循环替换递归函数来实现一样。

希望对您有所帮助！

编码愉快！！

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