fix: 优化图片预览索引胶囊

suixinkan/UI/TravelAlbum/TravelAlbumPhotoPreviewViewController.swift

@@ -41,6 +41,7 @@ final class TravelAlbumPhotoPreviewViewController: UIViewController {
     private let closeButton = UIButton(type: .system)
     private let titleLabel = UILabel()
     private let sizeLabel = UILabel()
+    private let counterContainer = UIView()
     private let counterLabel = UILabel()
     private let bottomChrome = UIView()
     private let divider = UIView()
@@ -159,10 +160,13 @@ final class TravelAlbumPhotoPreviewViewController: UIViewController {
         counterLabel.textColor = UIColor.white.withAlphaComponent(0.82)
         counterLabel.font = .monospacedDigitSystemFont(ofSize: 15, weight: .medium)
         counterLabel.textAlignment = .center
-        counterLabel.backgroundColor = UIColor(white: 0.11, alpha: 1)
+        counterLabel.numberOfLines = 1
-        counterLabel.layer.cornerRadius = 17
+        counterLabel.accessibilityIdentifier = "travelAlbum.previewCounterLabel"
-        counterLabel.clipsToBounds = true
+        counterLabel.setContentHuggingPriority(.required, for: .horizontal)
         counterLabel.setContentCompressionResistancePriority(.required, for: .horizontal)
+        counterContainer.backgroundColor = UIColor(white: 0.11, alpha: 1)
+        counterContainer.layer.cornerRadius = 17
+        counterContainer.clipsToBounds = true
 
         variantSegmentedControl.selectedSegmentTintColor = UIColor(white: 0.22, alpha: 1)
         variantSegmentedControl.backgroundColor = UIColor(white: 0.065, alpha: 1)
@@ -200,7 +204,8 @@ final class TravelAlbumPhotoPreviewViewController: UIViewController {
         view.addSubview(topChrome)
         topChrome.addSubview(closeButton)
         topChrome.addSubview(titleStack)
-        topChrome.addSubview(counterLabel)
+        topChrome.addSubview(counterContainer)
+        counterContainer.addSubview(counterLabel)
         view.addSubview(bottomChrome)
         bottomChrome.addSubview(divider)
         bottomChrome.addSubview(variantControls)
@@ -217,16 +222,20 @@ final class TravelAlbumPhotoPreviewViewController: UIViewController {
             make.bottom.equalToSuperview().offset(-14)
             make.size.equalTo(44)
         }
-        counterLabel.snp.makeConstraints { make in
+        counterContainer.snp.makeConstraints { make in
             make.trailing.equalToSuperview().inset(16)
             make.centerY.equalTo(closeButton)
             make.width.greaterThanOrEqualTo(48)
             make.height.equalTo(34)
         }
+        counterLabel.snp.makeConstraints { make in
+            make.leading.trailing.equalToSuperview().inset(12)
+            make.centerY.equalToSuperview()
+        }
         titleStack.snp.makeConstraints { make in
             make.centerY.equalTo(closeButton)
             make.leading.greaterThanOrEqualTo(closeButton.snp.trailing).offset(8)
-            make.trailing.lessThanOrEqualTo(counterLabel.snp.leading).offset(-8)
+            make.trailing.lessThanOrEqualTo(counterContainer.snp.leading).offset(-8)
             make.centerX.equalToSuperview()
             make.width.lessThanOrEqualTo(220)
         }

suixinkanTests/TravelAlbumDetailViewControllerTests.swift

@@ -67,6 +67,29 @@ final class TravelAlbumDetailViewControllerTests: XCTestCase {
         XCTAssertEqual(failure, .failure("服务暂不可用"))
     }
 
+    func testPreviewCounterUsesHorizontalPaddingAndContentDrivenWidth() throws {
+        let controller = TravelAlbumPhotoPreviewViewController(
+            projects: [makePreviewProject(id: 1, fileName: "原图.jpg")],
+            totalCount: 10_000,
+            startProjectIndex: 0
+        )
+        controller.loadViewIfNeeded()
+        controller.view.frame = CGRect(x: 0, y: 0, width: 390, height: 844)
+        controller.view.layoutIfNeeded()
+
+        let counterLabel = try XCTUnwrap(
+            controller.view.findSubview {
+                $0.accessibilityIdentifier == "travelAlbum.previewCounterLabel"
+            } as? UILabel
+        )
+        let counterContainer = try XCTUnwrap(counterLabel.superview)
+        let expectedWidth = max(48, counterLabel.intrinsicContentSize.width + 24)
+
+        XCTAssertEqual(counterContainer.bounds.width, expectedWidth, accuracy: 0.5)
+        XCTAssertEqual(counterLabel.frame.minX, 12, accuracy: 0.5)
+        XCTAssertEqual(counterContainer.bounds.width - counterLabel.frame.maxX, 12, accuracy: 0.5)
+    }
+
     func testPreviewSuccessfulDeletionShowsNextProjectAndPreventsDuplicateRequests() async throws {
         let api = TravelAlbumMockAPI()
         api.deleteMaterialDelayNanoseconds = 1_000_000