{"id":415,"date":"2025-06-01T11:17:09","date_gmt":"2025-06-05T03:29:09","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=415"},"modified":"2025-06-05T11:17:09","modified_gmt":"2025-06-05T03:29:09","slug":"swift-%e5%bb%a3%e5%91%8a-banner-%e8%bc%aa%e6%92%ad%e5%99%a8-%e7%85%a7%e7%89%87%e6%92%ad%e6%94%be%e5%99%a8-%e5%b9%bb%e7%87%88%e7%89%87","status":"publish","type":"post","link":"https:\/\/badgameshow.com\/steven\/swift\/swift-%e5%bb%a3%e5%91%8a-banner-%e8%bc%aa%e6%92%ad%e5%99%a8-%e7%85%a7%e7%89%87%e6%92%ad%e6%94%be%e5%99%a8-%e5%b9%bb%e7%87%88%e7%89%87\/","title":{"rendered":"Swift 2025 \u6700\u65b0\u7248\u5ee3\u544a Banner \u8f2a\u64ad\u5668\uff1a\u5b8c\u6574\u5be6\u4f5c\u6559\u5b78\u8207\u6700\u4f73\u5be6\u8e10"},"content":{"rendered":"

\u7c21\u8981<\/h2>\n

\u5728\u9019\u7bc7\u6587\u7ae0\u4e2d\uff0c\u6211\u5011\u5c07\u5b78\u7fd2\u5982\u4f55\u4f7f\u7528 Swift \u5be6\u73fe\u4e00\u500b\u5ee3\u544a Banner \u8f2a\u64ad\u5668\u3002\u9019\u500b\u8f2a\u64ad\u5668\u53ef\u4ee5\u7528\u4f86\u5c55\u793a\u5ee3\u544a\u6216\u512a\u60e0\u4fe1\u606f\uff0c\u4e26\u4e14\u652f\u6301\u5de6\u53f3\u6ed1\u52d5\u7684\u529f\u80fd\u3002\u9019\u662f\u4e00\u500b\u975e\u5e38\u5e38\u898b\u7684 UI \u5143\u4ef6\uff0c\u9069\u7528\u65bc\u5404\u7a2e\u61c9\u7528\u7a0b\u5e8f\u4e2d\u7684\u5ee3\u544a\u5c55\u793a\u3002<\/p>\n

\"Swift<\/p>\n

\u6b63\u984c<\/h2>\n

\u521d\u59cb\u8a2d\u5b9a<\/h3>\n

\u70ba\u4e86\u5be6\u73fe\u9019\u500b\u529f\u80fd\uff0c\u6211\u5011\u9700\u8981\u4f7f\u7528 `UIScrollView` \u4f86\u986f\u793a\u5716\u7247\uff0c\u4e26\u8a2d\u7f6e `UIScrollViewDelegate`\u3002\u4ee5\u4e0b\u662f\u521d\u59cb\u5316\u6240\u9700\u7684\u8b8a\u6578\uff1a<\/p>\n

– `currentIndex`\uff1a\u7d00\u9304\u76ee\u524d\u7684\u7d22\u5f15\u3002
\n– `imageArray`\uff1a\u5132\u5b58\u5716\u7247\u540d\u7a31\u3002
\n– `timer`\uff1a\u7528\u65bc\u5b9a\u6642\u5207\u63db\u5716\u7247\u3002
\n– `leftImageView`\u3001`rightImageView`\u3001`currentImageView`\uff1a\u7528\u65bc\u9810\u8f09\u5716\u7247\uff0c\u907f\u514d\u6ed1\u52d5\u6642\u51fa\u73fe\u5ef6\u9072\u3002<\/p>\n

“`swift
\nclass ViewController: UIViewController, UIScrollViewDelegate {
\n let width = UIScreen.main.bounds.size.width
\n var currentIndex: NSInteger = 0
\n var leftImageView = UIImageView()
\n var rightImageView = UIImageView()
\n var currentImageView = UIImageView()
\n var imageArray = [String]()
\n var timer = Timer()
\n}
\n“`<\/p>\n

\u61f6\u52a0\u8f09<\/h3>\n

ScrollView<\/h4>\n

\u63a5\u4e0b\u4f86\uff0c\u6211\u5011\u8a2d\u7f6e `UIScrollView` \u7684\u7bc4\u570d\u70ba\u624b\u6a5f\u5bec\u5ea6\u7684\u4e09\u500d\uff0c\u4e26\u5c07\u4e09\u5f35\u5716\u7247\u5e73\u5747\u5206\u5e03\u5728 `scrollView` \u4e2d\u3002<\/p>\n

“`swift
\nlazy var scrollView: UIScrollView = {
\n let scrollView = UIScrollView()
\n scrollView.contentSize = CGSize(width: width * 3, height: 200)
\n scrollView.contentOffset = CGPoint(x: width, y: 50)
\n scrollView.isPagingEnabled = true
\n scrollView.frame = CGRect(x: 0, y: 50, width: width, height: 200)
\n rightImageView.frame = CGRect(x: width * 2, y: 50, width: width, height: 200)
\n currentImageView.frame = CGRect(x: width * 1, y: 50, width: width, height: 200)
\n leftImageView.frame = CGRect(x: width * 0, y: 50, width: width, height: 200)
\n scrollView.addSubview(rightImageView)
\n scrollView.addSubview(currentImageView)
\n scrollView.addSubview(leftImageView)
\n scrollView.delegate = self
\n return scrollView
\n}()
\n“`<\/p>\n

PageControl<\/h4>\n

\u63a5\u8457\uff0c\u6211\u5011\u9700\u8981\u4e00\u500b `UIPageControl` \u4f86\u986f\u793a\u7576\u524d\u9801\u78bc\u548c\u5c0f\u5713\u9ede\u3002<\/p>\n

“`swift
\nlazy var pageControl: UIPageControl = {
\n let pageControl = UIPageControl()
\n pageControl.frame = CGRect(x: 0, y: scrollView.frame.maxY – 20, width: width, height: 20)
\n pageControl.backgroundColor = UIColor.clear
\n pageControl.currentPageIndicatorTintColor = UIColor.white
\n pageControl.pageIndicatorTintColor = UIColor.lightGray
\n pageControl.numberOfPages = imageArray.count
\n pageControl.currentPage = 0
\n return pageControl
\n}()
\n“`<\/p>\n

\u66f4\u65b0\u5716\u7247<\/h3>\n

\u5728\u6bcf\u6b21\u9801\u9762\u8b8a\u52d5\u6642\uff0c\u6211\u5011\u9700\u8981\u66f4\u65b0\u4e09\u500b `imageView`\uff0c\u4e26\u5c07 `scrollView` \u7684\u504f\u79fb\u91cf\u91cd\u7f6e\u56de\u4e2d\u9593\u3002<\/p>\n

“`swift
\nfunc reloadImage() {
\n var leftIndex = (currentIndex – 1 + imageArray.count) % imageArray.count
\n var rightIndex = (currentIndex + 1) % imageArray.count
\n scrollView.setContentOffset(CGPoint(x: width, y: 50), animated: false)
\n pageControl.currentPage = currentIndex
\n leftImageView.image = UIImage(named: imageArray[leftIndex])
\n currentImageView.image = UIImage(named: imageArray[currentIndex])
\n rightImageView.image = UIImage(named: imageArray[rightIndex])
\n}
\n“`<\/p>\n

Timer<\/h3>\n

\u6211\u5011\u8a2d\u5b9a\u4e00\u500b\u5b9a\u6642\u5668\uff0c\u6bcf\u5169\u79d2\u66f4\u65b0\u4e00\u6b21\u5716\u7247\u3002<\/p>\n

“`swift
\nfunc setupTimer() {
\n timer = Timer.scheduledTimer(timeInterval: 2, target: self, selector: #selector(timeChanged), userInfo: nil, repeats: true)
\n RunLoop.current.add(timer, forMode: .common)
\n}<\/p>\n

@objc func timeChanged() {
\n currentIndex = (currentIndex + 1) % imageArray.count
\n reloadImage()
\n}
\n“`<\/p>\n

ScrollView \u76e3\u807d\u4e8b\u4ef6<\/h3>\n

\u6211\u5011\u9700\u8981\u76e3\u807d `scrollView` \u7684\u6ed1\u52d5\u4e8b\u4ef6\uff0c\u4ee5\u4fbf\u5728\u6ed1\u52d5\u6642\u505c\u6b62\u81ea\u52d5\u8f2a\u64ad\uff0c\u4e26\u6839\u64da\u6ed1\u52d5\u65b9\u5411\u66f4\u65b0 `currentIndex`\u3002<\/p>\n

“`swift
\nfunc scrollViewWillBeginDragging(_ scrollView: UIScrollView) {
\n timer.invalidate()
\n}<\/p>\n

func scrollViewDidEndDecelerating(_ scrollView: UIScrollView) {
\n if scrollView.contentOffset.x > width {
\n currentIndex = (currentIndex + 1) % imageArray.count
\n } else if scrollView.contentOffset.x < width {\n currentIndex = (currentIndex - 1 + imageArray.count) % imageArray.count\n }\n pageControl.currentPage = currentIndex\n reloadImage()\n setupTimer()\n}\n```\n\n\n\n

viewDidLoad<\/h3>\n

\u5728 `viewDidLoad` \u4e2d\uff0c\u6211\u5011\u5c07\u5716\u7247\u52a0\u5165 `imageArray`\uff0c\u4e26\u5c07 `scrollView` \u548c `pageControl` \u6dfb\u52a0\u5230\u4e3b\u8996\u5716\u4e2d\u3002<\/p>\n

“`swift
\noverride func viewDidLoad() {
\n super.viewDidLoad()
\n imageArray = [“banner1”, “banner2”, “banner3”, “banner4”, “banner5”, “banner6”, “banner7”]\n self.view.addSubview(self.scrollView)
\n self.view.addSubview(self.pageControl)
\n reloadImage()
\n setupTimer()
\n}
\n“`<\/p>\n

\u932f\u8aa4\u6392\u9664<\/h2>\n

– \u82e5\u5716\u7247\u7121\u6cd5\u986f\u793a\uff0c\u8acb\u6aa2\u67e5\u5716\u7247\u540d\u7a31\u662f\u5426\u6b63\u78ba\uff0c\u4e26\u78ba\u8a8d\u5716\u7247\u5df2\u6dfb\u52a0\u81f3\u5c08\u6848\u4e2d\u3002
\n– \u82e5\u6ed1\u52d5\u6548\u679c\u4e0d\u6d41\u66a2\uff0c\u78ba\u4fdd `isPagingEnabled` \u8a2d\u7f6e\u70ba `true`\u3002<\/p>\n

\u5ef6\u4f38\u61c9\u7528<\/h2>\n

\u9019\u500b\u5ee3\u544a Banner \u8f2a\u64ad\u5668\u53ef\u4ee5\u64f4\u5c55\u81f3\u5176\u4ed6\u7528\u9014\uff0c\u4f8b\u5982\u5c55\u793a\u7522\u54c1\u5716\u7247\u3001\u4fc3\u92b7\u6d3b\u52d5\u7b49\uff0c\u4e26\u4e14\u53ef\u4ee5\u6839\u64da\u9700\u6c42\u81ea\u5b9a\u7fa9\u6a23\u5f0f\u548c\u904e\u6e21\u6548\u679c\u3002<\/p>\n

Demo<\/strong>
\n\"Banner<\/p>\n

\n GitHub \u9023\u7d50:
\n https:\/\/github.com\/Bgihe\/BannerTest<\/a>\n<\/p><\/blockquote>\n

\n

Q&A\uff08\u5e38\u898b\u554f\u984c\u89e3\u7b54\uff09<\/h2>\n

**Q1: \u5982\u4f55\u66f4\u6539\u8f2a\u64ad\u7684\u6642\u9593\u9593\u9694\uff1f**
\nA1: \u60a8\u53ef\u4ee5\u5728 `setupTimer` \u51fd\u6578\u4e2d\u4fee\u6539 `timeInterval` \u7684\u503c\u4f86\u8abf\u6574\u6642\u9593\u9593\u9694\u3002<\/p>\n

**Q2: \u5982\u4f55\u6dfb\u52a0\u66f4\u591a\u5716\u7247\uff1f**
\nA2: \u53ea\u9700\u5728 `imageArray` \u4e2d\u6dfb\u52a0\u66f4\u591a\u5716\u7247\u540d\u7a31\uff0c\u4e26\u78ba\u4fdd\u5b83\u5011\u5df2\u5305\u542b\u5728\u5c08\u6848\u4e2d\u3002<\/p>\n

**Q3: \u652f\u6301\u9ede\u64ca\u5716\u7247\u9032\u884c\u5c0e\u822a\u55ce\uff1f**
\nA3: \u662f\u7684\uff0c\u60a8\u53ef\u4ee5\u70ba `imageView` \u6dfb\u52a0\u9ede\u64ca\u624b\u52e2\uff0c\u7136\u5f8c\u5728\u624b\u52e2\u8b58\u5225\u5668\u4e2d\u57f7\u884c\u5c0e\u822a\u64cd\u4f5c\u3002<\/p>\n

—<\/p>\n","protected":false},"excerpt":{"rendered":"

\u5728APP\u4e5f\u662f\u6642\u5e38\u51fa\u73fe
\n\u5448\u73fe\u65b9\u5f0f\u5f88\u591a\u7a2e\u90fd\u53ef\u4ee5\u505a\u51fa\u4f86
\n\u53ef\u4ee5\u4f7f\u7528collectionView
\n\u6216\u662fscrollView+pageControl
\n\u4f46\u6211\u4e4b\u524d\u5728OC\u5beb\u7684\u90fd\u662f\u7528scrollView+pageControl<\/p>\n","protected":false},"author":1,"featured_media":559,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"aside","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[5],"tags":[],"class_list":["post-415","post","type-post","status-publish","format-aside","has-post-thumbnail","hentry","category-swift","post_format-post-format-aside"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/badgameshow.com\/steven\/wp-content\/uploads\/2020\/11\/cup-1-1.png","jetpack-related-posts":[],"jetpack_shortlink":"https:\/\/wp.me\/pcFK27-6H","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/415","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/comments?post=415"}],"version-history":[{"count":3,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/415\/revisions"}],"predecessor-version":[{"id":572,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/415\/revisions\/572"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/media\/559"}],"wp:attachment":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/media?parent=415"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=415"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=415"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}