{"id":7121,"date":"2025-06-03T13:23:09","date_gmt":"2025-06-05T06:11:09","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=7121"},"modified":"2025-06-05T13:23:09","modified_gmt":"2025-06-05T06:11:09","slug":"https-badgameshow-com-steven-235-2","status":"publish","type":"post","link":"https:\/\/badgameshow.com\/steven\/swift\/https-badgameshow-com-steven-235-2\/","title":{"rendered":"Swift \u5716\u7247\u7b49\u6bd4\u4f8b\u7e2e\u653e\u6548\u679c\uff1a2025 \u6700\u65b0\u65b9\u6cd5\u8207\u6700\u4f73\u5be6\u8e10 \ud83d\udcd0"},"content":{"rendered":"

“`html
\n<\/p>\n

Swift \u5716\u7247\u7b49\u6bd4\u4f8b\u7e2e\u653e\u6548\u679c\u4ecb\u7d39<\/h2>\n

\u5728 iOS \u61c9\u7528\u958b\u767c\u4e2d\uff0cSwift \u5716\u7247\u7b49\u6bd4\u4f8b\u7e2e\u653e\u6548\u679c<\/strong>\u662f\u4e00\u9805\u91cd\u8981\u7684\u6280\u8853\u3002\u5b83\u53ef\u4ee5\u8b93\u60a8\u5728\u4e0d\u6539\u8b8a\u5716\u7247\u539f\u59cb\u5c3a\u5bf8\u7684\u60c5\u6cc1\u4e0b\uff0c\u5c07\u5716\u7247\u7e2e\u653e\u5230\u6240\u9700\u7684\u5927\u5c0f\u3002\u672c\u6587\u5c07\u4ecb\u7d392025\u5e74\u6700\u65b0\u7684\u5be6\u73fe\u65b9\u6cd5\uff0c\u4e26\u63d0\u4f9b\u8a73\u7d30\u7684\u5be6\u4f5c\u7bc4\u4f8b\u3002<\/p>\n

\u6e96\u5099\u5de5\u4f5c<\/h2>\n

\u5728\u958b\u59cb\u4e4b\u524d\uff0c\u60a8\u9700\u8981\u5c07\u5716\u7247\u8f49\u63db\u6210 UIImage<\/code> \u7269\u4ef6\uff0c\u4e26\u53d6\u5f97\u5716\u7247\u7684\u539f\u59cb\u5c3a\u5bf8\uff1a<\/p>\n

let image = UIImage(named: \"image\")\nguard let originalImage = image else { return }\nlet size = originalImage.size\n<\/code><\/pre>\n
\u5be6\u4f5c\u5716\u7247\u7b49\u6bd4\u4f8b\u7e2e\u653e<\/h2>\n
\u63a5\u8457\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528 UIGraphicsBeginImageContext<\/code> \u4f86\u958b\u59cb\u7e6a\u88fd\u5716\u7247\uff0c\u4e26\u6307\u5b9a\u60a8\u60f3\u8981\u7684\u7e2e\u653e\u5c3a\u5bf8\uff1a<\/p>\n
let targetSize = CGSize(width: 100, height: 100)\nUIGraphicsBeginImageContext(targetSize)\noriginalImage.draw(in: CGRect(origin: .zero, size: targetSize))\nlet newImage = UIGraphicsGetImageFromCurrentImageContext()\nUIGraphicsEndImageContext()\n<\/code><\/pre>\n
\u5728\u4e0a\u9762\u7684\u7a0b\u5f0f\u78bc\u4e2d\uff0c\u6211\u5011\u5c07\u5716\u7247\u7e2e\u653e\u5230 100 x 100<\/code> \u7684\u5c3a\u5bf8\uff0c\u4e26\u5c07\u7e2e\u653e\u5f8c\u7684\u5716\u7247\u5b58\u653e\u5230 newImage<\/code> \u8b8a\u6578\u4e2d\u3002<\/p>\n
\u7e2e\u653e\u81f3\u539f\u59cb\u5c3a\u5bf8\u7684\u4e00\u534a<\/h2>\n
\u5982\u679c\u60a8\u60f3\u5c07\u5716\u7247\u7e2e\u653e\u5230\u539f\u59cb\u5c3a\u5bf8\u7684\u4e00\u534a\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u7a0b\u5f0f\u78bc\uff1a<\/p>\n
let newSize = CGSize(width: size.width \/ 2, height: size.height \/ 2)\nUIGraphicsBeginImageContext(newSize)\noriginalImage.draw(in: CGRect(origin: .zero, size: newSize))\nlet halfSizeImage = UIGraphicsGetImageFromCurrentImageContext()\nUIGraphicsEndImageContext()\n<\/code><\/pre>\n
\u9019\u6bb5\u7a0b\u5f0f\u78bc\u6703\u5c07\u5716\u7247\u7684\u5c3a\u5bf8\u7e2e\u653e\u81f3\u539f\u59cb\u5c3a\u5bf8\u7684\u4e00\u534a\uff0c\u4e26\u5c07\u7d50\u679c\u5b58\u653e\u5728 halfSizeImage<\/code> \u8b8a\u6578\u4e2d\u3002<\/p>\n
\u932f\u8aa4\u6392\u9664\u8207\u6ce8\u610f\u4e8b\u9805<\/h2>\n
    \n
  • \u78ba\u4fdd\u5716\u7247\u540d\u7a31\u6b63\u78ba\uff0c\u5426\u5247 UIImage(named: \"image\")<\/code> \u53ef\u80fd\u6703\u8fd4\u56de nil<\/code>\u3002<\/li>\n
  • \u7576\u7e2e\u653e\u5716\u7247\u5c3a\u5bf8\u6642\uff0c\u8acb\u6ce8\u610f\u4fdd\u6301\u5716\u7247\u7684\u6bd4\u4f8b\uff0c\u4ee5\u514d\u9020\u6210\u8b8a\u5f62\u3002<\/li>\n
  • \u5728\u4f7f\u7528 UIGraphicsBeginImageContext<\/code> \u6642\uff0c\u78ba\u4fdd\u5728\u7d50\u675f\u5f8c\u8abf\u7528 UIGraphicsEndImageContext()<\/code> \u4f86\u91cb\u653e\u8cc7\u6e90\u3002<\/li>\n<\/ul>\n
    \u5ef6\u4f38\u61c9\u7528<\/h2>\n
    \u9664\u4e86\u57fa\u672c\u7684\u7b49\u6bd4\u4f8b\u7e2e\u653e\u5916\uff0c\u60a8\u9084\u53ef\u4ee5\u9032\u4e00\u6b65\u63a2\u7d22\u4ee5\u4e0b\u61c9\u7528\uff1a<\/p>\n
      \n
    • \u5be6\u73fe\u5716\u7247\u88c1\u526a\u529f\u80fd\u3002<\/li>\n
    • \u6839\u64da\u8a2d\u5099\u87a2\u5e55\u5c3a\u5bf8\u81ea\u52d5\u8abf\u6574\u5716\u7247\u5927\u5c0f\u3002<\/li>\n
    • \u5728\u4e0d\u540c\u5834\u666f\u4e2d\u4f7f\u7528\u4e0d\u540c\u7684\u7e2e\u653e\u6a21\u5f0f\uff0c\u5982 aspectFit<\/code> \u548c aspectFill<\/code>\u3002<\/li>\n<\/ul>\n
      \"Swift<\/p>\n
      Q&A\uff08\u5e38\u898b\u554f\u984c\u89e3\u7b54\uff09<\/h2>\n
      1. \u5982\u4f55\u78ba\u4fdd\u5716\u7247\u4e0d\u5931\u771f\u5730\u7e2e\u653e\uff1f<\/h3>\n
      \u60a8\u53ef\u4ee5\u4f7f\u7528 aspectFit<\/code> \u6216 aspectFill<\/code> \u6a23\u5f0f\uff0c\u9019\u6a23\u53ef\u4ee5\u4fdd\u8b49\u5716\u7247\u5728\u7e2e\u653e\u6642\u4fdd\u6301\u5176\u539f\u59cb\u6bd4\u4f8b\u3002<\/p>\n
      2. \u4f7f\u7528 UIImageView \u6642\u5982\u4f55\u61c9\u7528\u7b49\u6bd4\u4f8b\u7e2e\u653e\uff1f<\/h3>\n
      \u5728\u4f7f\u7528 UIImageView<\/code> \u6642\uff0c\u60a8\u53ef\u4ee5\u8a2d\u7f6e\u5176\u5167\u5bb9\u6a21\u5f0f\u70ba .scaleAspectFit<\/code> \u6216 .scaleAspectFill<\/code> \u4f86\u5be6\u73fe\u7b49\u6bd4\u4f8b\u7e2e\u653e\u6548\u679c\u3002<\/p>\n
      3. \u5728 SwiftUI \u4e2d\u5982\u4f55\u5be6\u73fe\u5716\u7247\u7b49\u6bd4\u4f8b\u7e2e\u653e\uff1f<\/h3>\n
      \u5728 SwiftUI \u4e2d\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528 Image<\/code> \u7d50\u5408 resizable()<\/code> \u548c aspectRatio(contentMode: .fit)<\/code> \u4f86\u5be6\u73fe\u5716\u7247\u7684\u7b49\u6bd4\u4f8b\u7e2e\u653e\u3002<\/p>\n
      “`
      \n—<\/p>\n","protected":false},"excerpt":{"rendered":"
      \u6587\u7ae0\u6458\u8981\uff1a\u672c\u6587\u5c07\u4ecb\u7d39\u5982\u4f55\u4f7f\u7528Swift\u8a9e\u8a00\u4f86\u5be6\u73fe\u5716\u7247\u7b49\u6bd4\u4f8b\u7e2e\u653e\u7684\u6548\u679c\uff0c\u4e26\u8a73\u7d30\u4ecb\u7d39\u5982\u4f55\u4f7f\u7528Swift\u7684methods()\u51fd\u6578\u4f86\u5be6\u73fe\u6b64\u529f\u80fd\u3002<\/p>\n","protected":false},"author":1,"featured_media":7119,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[174,5],"tags":[173,9],"class_list":["post-7121","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ios","category-swift","tag-ios","tag-swift"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/badgameshow.com\/steven\/wp-content\/uploads\/2023\/02\/Swift-\u5716\u7247\u7b49\u6bd4\u4f8b\u7e2e\u653e\u6548\u679c-\ud83d\udcd0_1675402944.6932092.webp","jetpack-related-posts":[],"jetpack_shortlink":"https:\/\/wp.me\/pcFK27-1QR","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/7121","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=7121"}],"version-history":[{"count":1,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/7121\/revisions"}],"predecessor-version":[{"id":13166,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/7121\/revisions\/13166"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/media\/7119"}],"wp:attachment":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/media?parent=7121"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=7121"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=7121"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}