the layout function will make the code-completion invalid

Author: protosse

Example/PinLayoutSample/UI/Examples/IntroObjectiveC/IntroObjectiveCView.m

@@ -72,26 +72,26 @@ - (void) layoutSubviews {
 //    [[[[segmented.pinObjc rightOf:logo aligned:VerticalAlignTop] rightWithInsets:safeArea] marginHorizontal:margin] layout];
 //    [[[[[[textLabel.pinObjc belowOf:segmented aligned:HorizontalAlignLeft] widthOf:segmented] pinEdges] marginTop:margin] sizeToFit:FitWidth] layout];
 //    [[[[[separatorView.pinObjc belowOfViews:@[logo, textLabel] aligned:HorizontalAlignLeft] rightTo:segmented.edge.right] height:1] marginTop:margin] layout];
-    [logo.pinObjc
+    logo.pinObjc
      .topInsets(safeArea)
      .leftInsets(safeArea)
      .width(100).aspectRatio()
-     .margin(margin) layout];
-    [segmented.pinObjc
+     .margin(margin).layout();
+    segmented.pinObjc
      .rightOfAligned(logo, VerticalAlignTop)
      .rightInsets(safeArea)
-     .marginHorizontal(margin) layout];
-    [textLabel.pinObjc
+     .marginHorizontal(margin).layout();
+    textLabel.pinObjc
      .belowOfAligned(segmented, HorizontalAlignLeft)
      .widthOf(segmented)
      .pinEdges()
      .marginTop(margin)
-     .sizeToFitType(FitWidth) layout];
-    [separatorView.pinObjc
+     .sizeToFitType(FitWidth).layout();
+    separatorView.pinObjc
      .belowOfViewsAligned(@[logo, textLabel], HorizontalAlignLeft)
      .rightToEdge(segmented.edge.right)
      .height(1)
-     .marginTop(margin) layout];
+     .marginTop(margin).layout();
 }
 
 - (void) setLayoutGuidesTop:(CGFloat)top {

Sources/ObjectiveC/PinLayoutObjC.swift

@@ -33,15 +33,7 @@ import AppKit
     #if os(iOS) || os(tvOS)
     var safeArea: PEdgeInsets { get }
     #endif
-
-    /**
-     With the Objective-C interface, you must call the \"layout\" method to ensure the view is layouted correctly.
-     Ex:
-         [[[textLabel.pin_objc top] left] layout];"
-         [[[textLabel.pin_objc top] left] layout];"
-     */
-    func layout()
-
+    
     typealias POVoid = () -> PinLayoutObjC?
     typealias POValue = (_ value: CGFloat) -> PinLayoutObjC?
     typealias POEdgeInsets = (_ insets: PEdgeInsets) -> PinLayoutObjC?
@@ -56,6 +48,13 @@ import AppKit
     typealias POWrapTypeInsets = (_ type: WrapType, _ insets: PEdgeInsets) -> PinLayoutObjC?
     typealias POFitType = (_ type: Fit) -> PinLayoutObjC?
 
+    /**
+     With the Objective-C interface, you must call the \"layout\" method to ensure the view is layouted correctly.
+     Ex:
+         textLabel.pinObjc.top().left().layout()
+     */
+    var layout: POVoid { get }
+
     var top: POVoid { get }
     var topValue: POValue { get }
     var topPercent: POValue { get }

Sources/ObjectiveC/PinLayoutObjCImpl.swift

@@ -70,11 +70,12 @@ import AppKit
         }
     }
 
-    func layout() {
-        // With objective-c PinLayoutObjCImpl instance are sometimes deallocated only after the context has been quit. For this reason
-        // developpers must call the layout: method implicetely.
-        impl?.layout()
-        impl = nil
+    var layout: POVoid {
+        return { [weak self] in
+            _ = self?.impl?.layout()
+            self?.impl = nil
+            return self
+        }
     }
 
     var top: POVoid {