{"id":190888,"date":"2022-04-28T20:12:24","date_gmt":"2022-04-28T12:12:24","guid":{"rendered":"https:\/\/www.idc.net\/help\/190888\/"},"modified":"2022-04-28T20:12:24","modified_gmt":"2022-04-28T12:12:24","slug":"%e5%90%8e%e6%b5%aa%e4%ba%91ios%e6%95%99%e7%a8%8b%ef%bc%9a%e6%b7%bb%e5%8a%a0%e6%89%8b%e5%8a%bf%e4%ba%92%e5%8a%a8%e6%93%8d%e4%bd%9c","status":"publish","type":"post","link":"https:\/\/idc.net\/help\/190888\/","title":{"rendered":"\u540e\u6d6a\u4e91IOS\u6559\u7a0b\uff1a\u6dfb\u52a0\u624b\u52bf\u4e92\u52a8\u64cd\u4f5c"},"content":{"rendered":"

\u6982\u89c8 <\/h2>\n

\u624b\u52bf\u4fee\u9970\u7b26\u7528\u4e8e\u5904\u7406\u7528\u6237\u8f93\u5165\u4e8b\u4ef6 (\u4f8b\u5982\uff0c\u89e6\u63a7) \u5904\u7406\u6240\u9700\u7684\u6240\u6709\u903b\u8f91\uff0c\u5e76\u8bc6\u522b\u8fd9\u7c7b\u4e8b\u4ef6\u4f55\u65f6\u4e0e\u5df2\u77e5\u7684\u624b\u52bf\u6a21\u5f0f (\u4f8b\u5982\uff0c\u957f\u6309\u6216\u65cb\u8f6c) \u5339\u914d\u3002\u5728\u8bc6\u522b\u5230\u6a21\u5f0f\u65f6\uff0cSwiftUI \u4f1a\u8fd0\u884c\u4e00\u4e2a\u56de\u8c03\uff0c\u4f9b\u4f60\u7528\u6765\u66f4\u65b0\u89c6\u56fe\u72b6\u6001\u6216\u6267\u884c\u64cd\u4f5c\u3002 <\/p>\n

\u5c06\u624b\u52bf\u4fee\u9970\u7b26\u6dfb\u52a0\u5230\u89c6\u56fe <\/h3>\n

\u4f60\u6dfb\u52a0\u7684\u6bcf\u4e2a\u624b\u52bf\u90fd\u4f1a\u5e94\u7528\u4e8e\u89c6\u56fe\u5c42\u6b21\u7ed3\u6784\u4e2d\u7684\u7279\u5b9a\u89c6\u56fe\u3002\u82e5\u8981\u8bc6\u522b\u7279\u5b9a\u89c6\u56fe\u4e0a\u7684\u624b\u52bf\u4e8b\u4ef6\uff0c\u8bf7\u521b\u5efa\u5e76\u914d\u7f6e\u76f8\u5173\u624b\u52bf\uff0c\u7136\u540e\u4f7f\u7528 gesture(_:including:)<\/code> (\u82f1\u6587) \u4fee\u9970\u7b26\uff1a <\/p>\n

<\/span> struct<\/span> ShapeTapView<\/span>: View<\/span> <\/span>{<\/span><\/span><\/span>  var<\/span> body: some<\/span> View<\/span> {<\/span><\/span><\/span>  let<\/span> tap = TapGesture<\/span>()<\/span><\/span><\/span>  .onEnded { _<\/span> in<\/span><\/span><\/span><\/span>  print<\/span>(\"View tapped!\"<\/span>)<\/span><\/span><\/span>  }<\/span><\/span><\/span>  <\/span><\/span><\/span>  return<\/span> Circle<\/span>()<\/span><\/span><\/span>  .fill(Color<\/span>.blue)<\/span><\/span><\/span>  .frame(width: 100<\/span>, height: 100<\/span>, alignment: .center)<\/span><\/span><\/span>  .gesture(tap)<\/span><\/span><\/span>  }<\/span><\/span><\/span> }<\/span><\/span><\/code>\n<\/pre>\n
 \u54cd\u5e94\u624b\u52bf\u56de\u8c03 <\/h3>\n
 \u6bcf\u5f53\u624b\u52bf\u72b6\u6001\u53d1\u751f\u53d8\u5316\u65f6\uff0cSwiftUI \u90fd\u4f1a\u6839\u636e\u4f60\u6dfb\u52a0\u5230\u624b\u52bf\u4fee\u9970\u7b26\u7684\u56de\u8c03\u53cd\u9988\u7ed9\u4f60\u7684\u4ee3\u7801\u3002\u624b\u52bf\u4fee\u9970\u7b26\u63d0\u4f9b\u4e09\u79cd\u65b9\u5f0f\u6765\u63a5\u6536\u66f4\u65b0\uff1aupdating(_:body:)<\/code> (\u82f1\u6587)\u3001onChanged(_:)<\/code> (\u82f1\u6587) \u548c onEnded(_:)<\/code> (\u82f1\u6587)\u3002 <\/p>\n
 \u66f4\u65b0\u77ac\u65f6 UI \u72b6\u6001 <\/h4>\n
 \u82e5\u8981\u5728\u624b\u52bf\u53d1\u751f\u53d8\u5316\u65f6\u66f4\u65b0\u89c6\u56fe\uff0c\u8bf7\u5c06 GestureState<\/code> (\u82f1\u6587) \u5c5e\u6027\u6dfb\u52a0\u5230\u4f60\u7684\u89c6\u56fe\uff0c\u5e76\u5728 updating(_:body:)<\/code> (\u82f1\u6587) \u56de\u8c03\u4e2d\u66f4\u65b0\u5b83\u3002SwiftUI \u4f1a\u5728\u8bc6\u522b\u5230\u624b\u52bf\u4ee5\u53ca\u624b\u52bf\u7684\u503c\u53d1\u751f\u53d8\u5316\u65f6\u7acb\u5373\u8c03\u7528\u66f4\u65b0\u56de\u8c03\u3002\u4f8b\u5982\uff0cSwiftUI \u4f1a\u5728\u653e\u5927\u624b\u52bf\u4e00\u5f00\u59cb\u4fbf\u8c03\u7528\u66f4\u65b0\u56de\u8c03\uff0c\u7136\u540e\u5728\u6bcf\u6b21\u653e\u5927\u503c\u53d1\u751f\u53d8\u5316\u65f6\u518d\u6b21\u8c03\u7528\u56de\u8c03\u3002SwiftUI \u5728\u7528\u6237\u7ed3\u675f\u6216\u53d6\u6d88\u624b\u52bf\u65f6\u4e0d\u4f1a\u8c03\u7528\u66f4\u65b0\u56de\u8c03\u3002\u8fd9\u65f6\uff0c\u624b\u52bf\u72b6\u6001\u5c5e\u6027\u4f1a\u81ea\u52a8\u5c06\u5176\u72b6\u6001\u91cd\u7f6e\u4e3a\u521d\u59cb\u503c\u3002 <\/p>\n
 \u4f8b\u5982\uff0c\u82e5\u8981\u521b\u5efa\u4e00\u4e2a\u5728\u7528\u6237\u6267\u884c\u957f\u6309\u65f6\u6539\u53d8\u989c\u8272\u7684\u89c6\u56fe\uff0c\u8bf7\u6dfb\u52a0\u4e00\u4e2a\u624b\u52bf\u72b6\u6001\u5c5e\u6027\u5e76\u5728\u66f4\u65b0\u56de\u8c03\u4e2d\u66f4\u65b0\u5b83\u3002 <\/p>\n
<\/span> struct<\/span> CounterView<\/span>: View<\/span> <\/span>{<\/span><\/span><\/span>  @GestureState<\/span> var<\/span> isDetectingLongPress = false<\/span><\/span><\/span><\/span>  <\/span><\/span><\/span>  var<\/span> body: some<\/span> View<\/span> {<\/span><\/span><\/span>  let<\/span> press = LongPressGesture<\/span>(minimumDuration: 1<\/span>)<\/span><\/span><\/span>  .updating($isDetectingLongPress) { currentState, gestureState, transaction in<\/span><\/span><\/span><\/span>  gestureState = currentState<\/span><\/span><\/span>  }<\/span><\/span><\/span>  <\/span><\/span><\/span>  return<\/span> Circle<\/span>()<\/span><\/span><\/span>  .fill(isDetectingLongPress ? Color<\/span>.yellow : Color<\/span>.green)<\/span><\/span><\/span>  .frame(width: 100<\/span>, height: 100<\/span>, alignment: .center)<\/span><\/span><\/span>  .gesture(press)<\/span><\/span><\/span>  }<\/span><\/span><\/span> }<\/span><\/span><\/code>\n<\/pre>\n
 \u5728\u67d0\u4e2a\u624b\u52bf\u671f\u95f4\u66f4\u65b0\u6c38\u4e45\u72b6\u6001 <\/h4>\n
 \u82e5\u8981\u8ddf\u8e2a\u624b\u52bf\u7684\u53d8\u5316\u4e14\u5728\u624b\u52bf\u7ed3\u675f\u540e\u4e0d\u5e94\u91cd\u7f6e\uff0c\u8bf7\u4f7f\u7528 onChanged(_:)<\/code> (\u82f1\u6587) \u56de\u8c03\u3002\u4f8b\u5982\uff0c\u82e5\u8981\u5bf9\u4f60\u7684 App \u8bc6\u522b\u957f\u6309\u7684\u6b21\u6570\u8fdb\u884c\u8ba1\u6570\uff0c\u8bf7\u6dfb\u52a0\u4e00\u4e2a onChanged(_:)<\/code> (\u82f1\u6587) \u56de\u8c03\u5e76\u9012\u589e\u8ba1\u6570\u5668\u503c\u3002 <\/p>\n
<\/span> struct<\/span> CounterView<\/span>: View<\/span> <\/span>{<\/span><\/span><\/span>  @GestureState<\/span> var<\/span> isDetectingLongPress = false<\/span><\/span><\/span><\/span>  @State<\/span> var<\/span> totalNumberOfTaps = 0<\/span><\/span><\/span><\/span>  <\/span><\/span><\/span>  var<\/span> body: some<\/span> View<\/span> {<\/span><\/span><\/span>  let<\/span> press = LongPressGesture<\/span>(minimumDuration: 1<\/span>)<\/span><\/span><\/span>  .updating($isDetectingLongPress) { currentState, gestureState, transaction in<\/span><\/span><\/span><\/span>  gestureState = currentState<\/span><\/span><\/span>  }.onChanged { _<\/span> in<\/span><\/span><\/span><\/span>  self<\/span>.totalNumberOfTaps += 1<\/span><\/span><\/span><\/span>  }<\/span><\/span><\/span>  <\/span><\/span><\/span>  return<\/span> VStack<\/span> {<\/span><\/span><\/span>  Text<\/span>(\"\\(totalNumberOfTaps)\"<\/span>)<\/span><\/span><\/span>  .font(.largeTitle)<\/span><\/span><\/span>  <\/span><\/span><\/span>  Circle<\/span>()<\/span><\/span><\/span>  .fill(isDetectingLongPress ? Color<\/span>.yellow : Color<\/span>.green)<\/span><\/span><\/span>  .frame(width: 100<\/span>, height: 100<\/span>, alignment: .center)<\/span><\/span><\/span>  .gesture(press)<\/span><\/span><\/span>  }<\/span><\/span><\/span>  }<\/span><\/span><\/span> }<\/span><\/span><\/code>\n<\/pre>\n
 \u5728\u624b\u52bf\u7ed3\u675f\u65f6\u66f4\u65b0\u6c38\u4e45\u72b6\u6001 <\/h4>\n
 \u82e5\u8981\u8bc6\u522b\u624b\u52bf\u5728\u4f55\u65f6\u6210\u529f\u5b8c\u6210\u5e76\u68c0\u7d22\u624b\u52bf\u7684\u6700\u7ec8\u503c\uff0c\u8bf7\u5728\u56de\u8c03\u4e2d\u4f7f\u7528 onEnded(_:)<\/code> (\u82f1\u6587) \u51fd\u6570\u6765\u66f4\u65b0\u4f60\u7684 App \u7684\u72b6\u6001\u3002SwiftUI \u4ec5\u5728\u624b\u52bf\u6210\u529f\u65f6\u624d\u4f1a\u8c03\u7528 onEnded(_:)<\/code> (\u82f1\u6587) \u56de\u8c03\u3002\u4f8b\u5982\uff0c\u5728\u4e00\u4e2a LongPressGesture<\/code> (\u82f1\u6587) \u671f\u95f4\uff0c\u5982\u679c\u7528\u6237\u5728\u7ecf\u8fc7 minimumDuration<\/code> (\u82f1\u6587) \u79d2\u4e4b\u524d\u505c\u6b62\u89e6\u63a7\u89c6\u56fe\uff0c\u6216\u8005\u4ed6\u4eec\u7684\u624b\u6307\u79fb\u52a8\u8d85\u8fc7\u4e86 maximumDistance<\/code> (\u82f1\u6587) \u70b9\uff0c\u5219 SwiftUI \u4e0d\u4f1a\u8c03\u7528 onEnded(_:)<\/code> (\u82f1\u6587) \u56de\u8c03\u3002 <\/p>\n
 \u4f8b\u5982\uff0c\u82e5\u8981\u5728\u7528\u6237\u5b8c\u6210\u957f\u6309\u540e\u505c\u6b62\u957f\u6309\u5c1d\u8bd5\u8ba1\u6570\uff0c\u8bf7\u6dfb\u52a0\u4e00\u4e2a onEnded(_:)<\/code> (\u82f1\u6587) \u56de\u8c03\u5e76\u6709\u6761\u4ef6\u5730\u5e94\u7528\u624b\u52bf\u4fee\u9970\u7b26\u3002 <\/p>\n
<\/span> struct<\/span> CounterView<\/span>: View<\/span> <\/span>{<\/span><\/span><\/span>  @GestureState<\/span> var<\/span> isDetectingLongPress = false<\/span><\/span><\/span><\/span>  @State<\/span> var<\/span> totalNumberOfTaps = 0<\/span><\/span><\/span><\/span>  @State<\/span> var<\/span> doneCounting = false<\/span><\/span><\/span><\/span>  <\/span><\/span><\/span>  var<\/span> body: some<\/span> View<\/span> {<\/span><\/span><\/span>  let<\/span> press = LongPressGesture<\/span>(minimumDuration: 1<\/span>)<\/span><\/span><\/span>  .updating($isDetectingLongPress) { currentState, gestureState, transaction in<\/span><\/span><\/span><\/span>  gestureState = currentState<\/span><\/span><\/span>  }.onChanged { _<\/span> in<\/span><\/span><\/span><\/span>  self<\/span>.totalNumberOfTaps += 1<\/span><\/span><\/span><\/span>  }<\/span><\/span><\/span>  .onEnded { _<\/span> in<\/span><\/span><\/span><\/span>  self<\/span>.doneCounting = true<\/span><\/span><\/span><\/span>  }<\/span><\/span><\/span>  <\/span><\/span><\/span>  return<\/span> VStack<\/span> {<\/span><\/span><\/span>  Text<\/span>(\"\\(totalNumberOfTaps)\"<\/span>)<\/span><\/span><\/span>  .font(.largeTitle)<\/span><\/span><\/span>  <\/span><\/span><\/span>  Circle<\/span>()<\/span><\/span><\/span>  .fill(doneCounting ? Color<\/span>.red : isDetectingLongPress ? Color<\/span>.yellow : Color<\/span>.green)<\/span><\/span><\/span>  .frame(width: 100<\/span>, height: 100<\/span>, alignment: .center)<\/span><\/span><\/span>  .gesture(doneCounting ? nil<\/span> : press)<\/span><\/span><\/span>  }<\/span><\/span><\/span>  }<\/span><\/span><\/span> }<\/span><\/span><\/code>\n<\/pre>\n","protected":false},"excerpt":{"rendered":"
\u6982\u89c8 \u624b\u52bf\u4fee\u9970\u7b26\u7528\u4e8e\u5904\u7406\u7528\u6237\u8f93\u5165\u4e8b\u4ef6 (\u4f8b\u5982\uff0c\u89e6\u63a7) \u5904\u7406\u6240\u9700\u7684\u6240\u6709\u903b\u8f91\uff0c\u5e76\u8bc6\u522b\u8fd9\u7c7b\u4e8b\u4ef6\u4f55\u65f6\u4e0e\u5df2\u77e5\u7684\u624b\u52bf\u6a21\u5f0f  […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[189686],"tags":[],"class_list":["post-190888","post","type-post","status-publish","format-standard","hentry","category-ios"],"_links":{"self":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/190888","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/comments?post=190888"}],"version-history":[{"count":0,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/190888\/revisions"}],"wp:attachment":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/media?parent=190888"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/categories?post=190888"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/tags?post=190888"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}