Update Combine README

Author: iwecon

Demo/Demo/Preview1ViewController.swift

@@ -21,6 +21,12 @@ class Preview1ViewController: UIViewController {
     @Published var brief = "The best way to use HStack and VStack in UIKit, and also supports Spacer and Divider."
 
     var cancellables: Set<AnyCancellable> = []
+    
+    deinit {
+        // ⚠️ important
+        // cleanup at deinit
+        cancellables.forEach({ $0.cancel() })
+    }
 
     override func viewDidLoad() {
         super.viewDidLoad()
@@ -51,30 +57,24 @@ class Preview1ViewController: UIViewController {
         container.addContent {
             logoView.stack.size(80)
             VStackView(alignment: .left, distribution: .spacing(6)) {
-                nameLabel.stack
+                nameLabel
+                    .stack
                     .receive(text: $name, storeIn: &cancellables)
 
-                briefLabel.stack.maxWidth(220)
+                briefLabel
+                    .stack.maxWidth(220)
                     .receive(text: $brief, storeIn: &cancellables)
             }
         }
 
         self.view.addSubview(container)
 
+        // update combine value and refresh layout container
         DispatchQueue.main.asyncAfter(wallDeadline: .now() + 2) {
-            print("done")
-            self.name = "StackKit design by iWECon"
-            self.brief = "Yes!!!"
+            self.name = "Designed by iWECon"
+            self.brief = "Version: 1.2.3"
             self.container.setNeedsLayout()
         }
-        
-        DispatchQueue.global().asyncAfter(wallDeadline: .now() + 5) {
-            self.name = "StackKit design by iWECon1"
-            self.brief = "Yes!!!2"
-            DispatchQueue.main.async {
-                self.container.setNeedsLayout()
-            }
-        }
     }
 
     override func viewDidLayoutSubviews() {

README.md

@@ -2,6 +2,8 @@
 
 ☝️ A layout library similar to SwiftUI.
 
+🔥 Support `Combine` (available iOS 13.0+)
+
 ⚠️ If you have any questions or new ideas, you can bring me a PR at any time.
 
 
@@ -23,6 +25,8 @@ HStackView(alignment: .center, distribution: .spacing(14), padding: UIEdgeInsets
 ![Demo](Demo/preview2.png)
 
 
+⚠️ If you have any question, please see the demo in `Demo/Demo.xcodeproj` or submit issue.
+
 💡 There are no more examples, you can help to complete/optimize.
 
 
@@ -85,7 +89,6 @@ VStackView {
 }
 ```
 
-
 ### Change and update
 
 ```swift
@@ -96,6 +99,34 @@ briefLabel.text = "Bump version to 1.2.2"
 stackContainer.setNeedsLayout() // or .sizeToFit() 
 ```
 
+### Combine
+
+```swift
+
+import Combine
+
+// ...
+@Published var name: String = "StackKit"
+
+var cancellables = Set<AnyCancellable>()
+
+// ...
+HStackView {
+    UILabel()
+        .stack
+        .then {
+            $0.font = .systemFont(ofSize: 16)
+            $0.textColor = .systemPink
+        }
+        .receive(text: $name, storeIn: &cancellables)
+}
+
+// update name
+self.name = "StackKit version 1.2.3"
+// update stackView
+stackView.setNeedsLayout()
+```
+
 # 🤔 
 
 I'm not very good at writing documents. If you have the advantages in this regard, please submit PR to me. Thank you very much.

Sources/StackKit/UIView+StackKit/UIView+Combine.swift

@@ -51,7 +51,6 @@ extension StackKitCompatible where Base: UIView {
     }
 }
 
-
 /**
  这里由于设计逻辑，会有个问题
 
@@ -61,6 +60,7 @@ extension StackKitCompatible where Base: UIView {
  这样就会导致一个问题：
     ❌ 在主线程中修改值，并触发 `container.setNeedsLayout()` 的时候，
  `setNeedsLayout` 会先执行，而 `publisher` 会将任务派发到下一个 loop cycle (也就是 setNeedsLayout 和 receive 先后执行的问题)
+ 所以这里采用 `safetyAccessUI` 来处理线程问题
  */
 
 @available(iOS 13.0, *)