自定义形状，

demo.xcodeproj/project.pbxproj

@@ -7,6 +7,8 @@
 	objects = {
 
 /* Begin PBXBuildFile section */
+		96151D962B68BE7100DBB72C /* ViewExtensions.swift in Sources */ = {isa = PBXBuildFile; fileRef = 96151D952B68BE7100DBB72C /* ViewExtensions.swift */; };
+		96151D992B68FC9800DBB72C /* TopRoundedRectangle.swift in Sources */ = {isa = PBXBuildFile; fileRef = 96151D982B68FC9800DBB72C /* TopRoundedRectangle.swift */; };
 		968A6F642B5F4C99008609EE /* demoApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 968A6F632B5F4C99008609EE /* demoApp.swift */; };
 		968A6F6A2B5F4C9B008609EE /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 968A6F692B5F4C9B008609EE /* Assets.xcassets */; };
 		968A6F6D2B5F4C9B008609EE /* Preview Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 968A6F6C2B5F4C9B008609EE /* Preview Assets.xcassets */; };
@@ -47,6 +49,8 @@
 /* End PBXBuildFile section */
 
 /* Begin PBXFileReference section */
+		96151D952B68BE7100DBB72C /* ViewExtensions.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ViewExtensions.swift; sourceTree = "<group>"; };
+		96151D982B68FC9800DBB72C /* TopRoundedRectangle.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = TopRoundedRectangle.swift; sourceTree = "<group>"; };
 		968A6F602B5F4C99008609EE /* demo.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = demo.app; sourceTree = BUILT_PRODUCTS_DIR; };
 		968A6F632B5F4C99008609EE /* demoApp.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = demoApp.swift; sourceTree = "<group>"; };
 		968A6F692B5F4C9B008609EE /* Assets.xcassets */ = {isa = PBXFileReference; lastKnownFileType = folder.assetcatalog; path = Assets.xcassets; sourceTree = "<group>"; };
@@ -98,6 +102,14 @@
 /* End PBXFrameworksBuildPhase section */
 
 /* Begin PBXGroup section */
+		96151D972B68FC5600DBB72C /* Extensions */ = {
+			isa = PBXGroup;
+			children = (
+				96151D982B68FC9800DBB72C /* TopRoundedRectangle.swift */,
+			);
+			path = Extensions;
+			sourceTree = "<group>";
+		};
 		968A6F572B5F4C99008609EE = {
 			isa = PBXGroup;
 			children = (
@@ -117,11 +129,13 @@
 		968A6F622B5F4C99008609EE /* demo */ = {
 			isa = PBXGroup;
 			children = (
+				96151D972B68FC5600DBB72C /* Extensions */,
 				968A6F762B5F4E0D008609EE /* Components */,
 				968A6F732B5F4DF3008609EE /* Controllers */,
 				968A6F742B5F4DF9008609EE /* Models */,
 				968A6F752B5F4DFD008609EE /* Views */,
 				968A6F632B5F4C99008609EE /* demoApp.swift */,
+				96151D952B68BE7100DBB72C /* ViewExtensions.swift */,
 				968A6F692B5F4C9B008609EE /* Assets.xcassets */,
 				968A6F6B2B5F4C9B008609EE /* Preview Content */,
 			);
@@ -344,6 +358,7 @@
 				968A6F852B5F4EB2008609EE /* MessageView.swift in Sources */,
 				968A6FA02B5F6893008609EE /* RegisterView.swift in Sources */,
 				968A6FB22B5FC3A2008609EE /* ShowMore.swift in Sources */,
+				96151D992B68FC9800DBB72C /* TopRoundedRectangle.swift in Sources */,
 				968A6F822B5F4EA1008609EE /* MallView.swift in Sources */,
 				968A6F972B5F683E008609EE /* CouponView.swift in Sources */,
 				96E93E9B2B622931004AB649 /* UserAvatarView.swift in Sources */,
@@ -362,6 +377,7 @@
 				968A6F7F2B5F4E91008609EE /* HomeView.swift in Sources */,
 				968A6FA22B5F68AA008609EE /* ForgotView.swift in Sources */,
 				968A6F792B5F4E28008609EE /* TabBarView.swift in Sources */,
+				96151D962B68BE7100DBB72C /* ViewExtensions.swift in Sources */,
 				96E93EA32B63B164004AB649 /* RadioButton.swift in Sources */,
 				96E93E9F2B62305F004AB649 /* UserNicknameView.swift in Sources */,
 				968A6FA82B5F6AF3008609EE /* CartView.swift in Sources */,
@@ -519,7 +535,7 @@
 				INFOPLIST_KEY_UIRequiresFullScreen = YES;
 				INFOPLIST_KEY_UISupportedInterfaceOrientations_iPad = "UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight";
 				INFOPLIST_KEY_UISupportedInterfaceOrientations_iPhone = "UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight";
-				IPHONEOS_DEPLOYMENT_TARGET = 15.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 14.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/Frameworks",
@@ -556,7 +572,7 @@
 				INFOPLIST_KEY_UIRequiresFullScreen = YES;
 				INFOPLIST_KEY_UISupportedInterfaceOrientations_iPad = "UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight";
 				INFOPLIST_KEY_UISupportedInterfaceOrientations_iPhone = "UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight";
-				IPHONEOS_DEPLOYMENT_TARGET = 15.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 14.0;
 				LD_RUNPATH_SEARCH_PATHS = (
 					"$(inherited)",
 					"@executable_path/Frameworks",