xctest中的屏幕比例因子

我通过将AccessibilityIdentifier添加到AppDelegate中包含所需信息的窗口来管理它:

int scaleFactor = [[NSNumber numberWithDouble:[UIScreen mainScreen].scale] intValue];
self.window.accessibilityIdentifier = [NSString stringWithFormat:@"windowScale:%d", scaleFactor];

稍后在我的测试中访问和解析:

var windowsScaleFactor: Int {
        let scaleFactorString = self.windows.firstMatch.identifier
        guard let scaleFactor = Int(scaleFactorString.components(separatedBy: CharacterSet.decimalDigits.inverted).joined(separator: "")) else {
            fatalError("Could not determine window scale factor")
        }
        return scaleFactor
    }