{"id":3981,"date":"2025-06-01T11:52:56","date_gmt":"2025-06-05T03:52:55","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=3981"},"modified":"2025-06-05T11:52:56","modified_gmt":"2025-06-05T03:52:55","slug":"%e5%ad%b8%e7%bf%92%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8swift%e4%b8%ad%e7%9a%84%e6%96%87%e6%9c%ac%e8%bc%b8%e5%85%a5%e6%a1%86","status":"publish","type":"post","link":"https:\/\/badgameshow.com\/steven\/swift\/%e5%ad%b8%e7%bf%92%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8swift%e4%b8%ad%e7%9a%84%e6%96%87%e6%9c%ac%e8%bc%b8%e5%85%a5%e6%a1%86\/","title":{"rendered":"\u6700\u65b0 Swift \u7a0b\u5f0f\u6559\u5b78\uff1a\u6df1\u5165\u638c\u63e1 UITextField \u6587\u672c\u8f38\u5165\u6846\u7684\u4f7f\u7528\u6280\u5de7"},"content":{"rendered":"

<\/p>\n

\u6700\u65b0 Swift \u7a0b\u5f0f\u6559\u5b78\uff1a\u6df1\u5165\u638c\u63e1 UITextField \u6587\u672c\u8f38\u5165\u6846\u7684\u4f7f\u7528\u6280\u5de7<\/h1>\n

\u5728 Swift \u4e2d\uff0c`UITextField` \u662f\u4e00\u7a2e\u5e38\u7528\u7684\u7528\u6236\u754c\u9762\u5143\u7d20\uff0c\u5141\u8a31\u7528\u6236\u8f38\u5165\u6587\u672c\u4fe1\u606f\u3002\u672c\u6587\u5c07\u4ecb\u7d39\u5982\u4f55\u4f7f\u7528 `UITextField` \u985e\u4f86\u5be6\u73fe\u6587\u672c\u8f38\u5165\u6846\uff0c\u5305\u62ec\u5982\u4f55\u8a2d\u7f6e\u6587\u672c\u8f38\u5165\u6846\u7684\u5360\u4f4d\u6587\u5b57\u3001\u5982\u4f55\u7372\u53d6\u6587\u672c\u8f38\u5165\u6846\u7684\u6587\u672c\u5167\u5bb9\uff0c\u4ee5\u53ca\u5982\u4f55\u70ba\u6587\u672c\u8f38\u5165\u6846\u6dfb\u52a0\u4e8b\u4ef6\u8655\u7406\u65b9\u6cd5\u7b49\uff0c\u5747\u4ee5 **2025 \u6700\u65b0\u8a9e\u6cd5\u8207\u6700\u4f73\u5be6\u8e10** \u70ba\u57fa\u790e\u3002<\/p>\n

\u4f7f\u7528 UITextField \u985e\u5be6\u73fe\u6587\u672c\u8f38\u5165\u6846<\/h2>\n

`UITextField` \u985e\u662f\u4e00\u500b\u7528\u65bc\u5be6\u73fe\u6587\u672c\u8f38\u5165\u6846\u7684\u5f37\u5927\u5de5\u5177\u3002\u8981\u4f7f\u7528 `UITextField` \u985e\uff0c\u9996\u5148\u9700\u8981\u5275\u5efa\u4e00\u500b `UITextField` \u5c0d\u8c61\uff0c\u7136\u5f8c\u5c07\u5176\u6dfb\u52a0\u5230\u8996\u5716\u4e2d\uff1a<\/p>\n

“`swift
\nlet textField = UITextField()
\ntextField.borderStyle = .roundedRect \/\/ \u8a2d\u7f6e\u908a\u6846\u6a23\u5f0f
\nview.addSubview(textField)
\n“`<\/p>\n

\u5728\u9019\u88e1\uff0c\u6211\u5011\u9084\u70ba\u6587\u672c\u6846\u8a2d\u7f6e\u4e86\u5713\u89d2\u908a\u6846\u6a23\u5f0f\uff0c\u9019\u6a23\u53ef\u4ee5\u4f7f\u754c\u9762\u770b\u8d77\u4f86\u66f4\u7f8e\u89c0\u3002<\/p>\n

\u8a2d\u7f6e\u6587\u672c\u8f38\u5165\u6846\u7684\u5360\u4f4d\u6587\u5b57<\/h2>\n

\u6587\u672c\u8f38\u5165\u6846\u53ef\u4ee5\u8a2d\u7f6e\u5360\u4f4d\u6587\u5b57\uff0c\u9019\u662f\u4e00\u6bb5\u63d0\u793a\u6587\u5b57\uff0c\u7528\u65bc\u5f15\u5c0e\u7528\u6236\u8f38\u5165\u5167\u5bb9\u3002\u8981\u8a2d\u7f6e\u5360\u4f4d\u6587\u5b57\uff0c\u53ef\u4ee5\u4f7f\u7528 `UITextField` \u7684 `placeholder` \u5c6c\u6027\uff1a<\/p>\n

“`swift
\ntextField.placeholder = “\u8acb\u8f38\u5165\u6587\u672c”
\n“`<\/p>\n

\u6b64\u5916\uff0c\u60a8\u9084\u53ef\u4ee5\u8a2d\u7f6e\u5360\u4f4d\u6587\u5b57\u7684\u984f\u8272\uff0c\u4ee5\u4fbf\u4f7f\u5176\u8207\u80cc\u666f\u8272\u5f62\u6210\u66f4\u597d\u7684\u5c0d\u6bd4\uff1a<\/p>\n

“`swift
\ntextField.attributedPlaceholder = NSAttributedString(string: “\u8acb\u8f38\u5165\u6587\u672c”, attributes: [NSAttributedString.Key.foregroundColor: UIColor.lightGray])
\n“`<\/p>\n

\u7372\u53d6\u6587\u672c\u8f38\u5165\u6846\u7684\u6587\u672c\u5167\u5bb9<\/h2>\n

\u8981\u7372\u53d6\u6587\u672c\u8f38\u5165\u6846\u7684\u6587\u672c\u5167\u5bb9\uff0c\u53ef\u4ee5\u4f7f\u7528 `UITextField` \u7684 `text` \u5c6c\u6027\uff1a<\/p>\n

“`swift
\nif let text = textField.text {
\n print(“\u7528\u6236\u8f38\u5165\u7684\u6587\u672c\u662f\uff1a\\(text)”)
\n}
\n“`<\/p>\n

\u9019\u6bb5\u4ee3\u78bc\u5b89\u5168\u5730\u6aa2\u67e5\u4e86\u6587\u672c\u6846\u4e2d\u7684\u6587\u672c\uff0c\u4e26\u6253\u5370\u51fa\u7528\u6236\u8f38\u5165\u7684\u5167\u5bb9\u3002<\/p>\n

\u70ba\u6587\u672c\u8f38\u5165\u6846\u6dfb\u52a0\u4e8b\u4ef6\u8655\u7406\u65b9\u6cd5<\/h2>\n

\u6587\u672c\u8f38\u5165\u6846\u53ef\u4ee5\u6dfb\u52a0\u4e8b\u4ef6\u8655\u7406\u65b9\u6cd5\uff0c\u4ee5\u4fbf\u5728\u7528\u6236\u8f38\u5165\u6587\u672c\u6642\u505a\u51fa\u97ff\u61c9\u3002\u8981\u70ba\u6587\u672c\u8f38\u5165\u6846\u6dfb\u52a0\u4e8b\u4ef6\u8655\u7406\u65b9\u6cd5\uff0c\u53ef\u4ee5\u4f7f\u7528 `UITextField` \u7684 `addTarget(_:action:for:)` \u65b9\u6cd5\uff1a<\/p>\n

“`swift
\ntextField.addTarget(self, action: #selector(textFieldDidChange(_:)), for: .editingChanged)
\n“`<\/p>\n

\u4e0a\u9762\u7684\u4ee3\u78bc\u5c07 `textFieldDidChange(_:)` \u65b9\u6cd5\u6dfb\u52a0\u5230\u6587\u672c\u8f38\u5165\u6846\u7684 `editingChanged` \u4e8b\u4ef6\u4e2d\uff0c\u7576\u7528\u6236\u8f38\u5165\u6587\u672c\u6642\uff0c\u5c31\u6703\u8abf\u7528\u8a72\u65b9\u6cd5\uff1a<\/p>\n

“`swift
\n@objc func textFieldDidChange(_ textField: UITextField) {
\n \/\/ \u5728\u9019\u88e1\u8655\u7406\u6587\u672c\u8f38\u5165\u6846\u7684\u6587\u672c\u8b8a\u5316
\n if let text = textField.text {
\n print(“\u7576\u524d\u6587\u672c\uff1a\\(text)”)
\n }
\n}
\n“`<\/p>\n

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

\u5728\u5be6\u4f5c\u904e\u7a0b\u4e2d\uff0c\u53ef\u80fd\u6703\u9047\u5230\u4e00\u4e9b\u5e38\u898b\u932f\u8aa4\uff0c\u4f8b\u5982\uff1a
\n– \u78ba\u4fdd `UITextField` \u7269\u4ef6\u5df2\u7d93\u88ab\u6dfb\u52a0\u5230\u8996\u5716\u4e2d\uff0c\u5426\u5247\u5c07\u7121\u6cd5\u986f\u793a\u6216\u63a5\u6536\u8f38\u5165\u3002
\n– \u78ba\u4fdd\u5728 `textFieldDidChange(_:)` \u65b9\u6cd5\u4e2d\u5c0d `text` \u7684\u4f7f\u7528\u4e0d\u6703\u5c0e\u81f4\u5d29\u6f70\uff0c\u61c9\u4f7f\u7528\u53ef\u9078\u7d81\u5b9a\u3002<\/p>\n

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

\u60a8\u53ef\u4ee5\u5c07 `UITextField` \u8207\u5176\u4ed6 UI \u5143\u7d20\u7d50\u5408\u4f7f\u7528\uff0c\u4f8b\u5982\u5c07\u5176\u8207 UIButton \u9023\u7d50\uff0c\u7576\u7528\u6236\u8f38\u5165\u6587\u672c\u5f8c\u9ede\u64ca\u6309\u9215\u9032\u884c\u63d0\u4ea4\u3002<\/p>\n

“`swift
\nlet submitButton = UIButton(type: .system)
\nsubmitButton.setTitle(“\u63d0\u4ea4”, for: .normal)
\nsubmitButton.addTarget(self, action: #selector(submitText), for: .touchUpInside)
\nview.addSubview(submitButton)
\n“`<\/p>\n

“`swift
\n@objc func submitText() {
\n if let text = textField.text, !text.isEmpty {
\n print(“\u63d0\u4ea4\u7684\u6587\u672c\uff1a\\(text)”)
\n } else {
\n print(“\u8acb\u8f38\u5165\u6587\u672c\u5f8c\u518d\u63d0\u4ea4\u3002”)
\n }
\n}
\n“`<\/p>\n

\u7d50\u8ad6<\/h2>\n

\u672c\u6587\u4ecb\u7d39\u4e86\u5982\u4f55\u4f7f\u7528 `UITextField` \u985e\u4f86\u5be6\u73fe\u6587\u672c\u8f38\u5165\u6846\uff0c\u5305\u62ec\u5982\u4f55\u8a2d\u7f6e\u5360\u4f4d\u6587\u5b57\u3001\u7372\u53d6\u6587\u672c\u5167\u5bb9\u3001\u6dfb\u52a0\u4e8b\u4ef6\u8655\u7406\u65b9\u6cd5\uff0c\u4ee5\u53ca\u932f\u8aa4\u6392\u9664\u548c\u5ef6\u4f38\u61c9\u7528\u3002\u901a\u904e\u4e0a\u8ff0\u6b65\u9a5f\uff0c\u60a8\u53ef\u4ee5\u8f15\u9b06\u5be6\u73fe\u6587\u672c\u8f38\u5165\u6846\u7684\u529f\u80fd\uff0c\u4e26\u63d0\u5347\u7528\u6236\u9ad4\u9a57\u3002<\/p>\n

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

**Q1: \u5982\u4f55\u8a2d\u7f6e UITextField \u7684\u8f38\u5165\u683c\u5f0f\uff1f**
\nA1: \u60a8\u53ef\u4ee5\u4f7f\u7528 `UITextFieldDelegate` \u4f86\u9650\u5236\u7528\u6236\u8f38\u5165\u7279\u5b9a\u683c\u5f0f\u7684\u5167\u5bb9\uff0c\u4f8b\u5982\u50c5\u5141\u8a31\u6578\u5b57\u8f38\u5165\u3002<\/p>\n

**Q2: UITextField \u7684\u5360\u4f4d\u6587\u5b57\u984f\u8272\u53ef\u4ee5\u4fee\u6539\u55ce\uff1f**
\nA2: \u662f\u7684\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528 `attributedPlaceholder` \u5c6c\u6027\u4f86\u8a2d\u7f6e\u5360\u4f4d\u6587\u5b57\u7684\u984f\u8272\u548c\u5b57\u9ad4\u6a23\u5f0f\u3002<\/p>\n

**Q3: \u5982\u4f55\u6e05\u7a7a UITextField \u7684\u5167\u5bb9\uff1f**
\nA3: \u60a8\u53ef\u4ee5\u76f4\u63a5\u5c07 `textField.text` \u8a2d\u7f6e\u70ba\u7a7a\u5b57\u7b26\u4e32\uff0c\u5982 `textField.text = “”`\uff0c\u4f86\u6e05\u7a7a\u6587\u672c\u6846\u7684\u5167\u5bb9\u3002<\/p>\n

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

\u6587\u7ae0\u6458\u8981\uff1a\u672c\u6587\u5c07\u4ecb\u7d39\u5982\u4f55\u4f7f\u7528Swift\u4e2d\u7684\u6587\u672c\u8f38\u5165\u6846\uff0c\u5305\u62ec\u5982\u4f55\u4f7f\u7528UITextField\u985e\u4f86\u5be6\u73fe\u6587\u672c\u8f38\u5165\u6846\u3001\u5982\u4f55\u8a2d\u7f6e\u6587\u672c\u8f38\u5165\u6846\u7684\u5360\u4f4d\u6587\u5b57\u3001\u5982\u4f55\u7372\u53d6\u6587\u672c\u8f38\u5165\u6846\u7684\u6587\u672c\u5167\u5bb9\u3001\u5982\u4f55\u70ba\u6587\u672c\u8f38\u5165\u6846\u6dfb\u52a0\u4e8b\u4ef6\u8655\u7406\u65b9\u6cd5\u7b49\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","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-3981","post","type-post","status-publish","format-standard","hentry","category-ios","category-swift","tag-ios","tag-swift"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack-related-posts":[],"jetpack_shortlink":"https:\/\/wp.me\/pcFK27-12d","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/3981","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=3981"}],"version-history":[{"count":1,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/3981\/revisions"}],"predecessor-version":[{"id":3982,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/3981\/revisions\/3982"}],"wp:attachment":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/media?parent=3981"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=3981"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=3981"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}