add SwiftUI modifier

Author: HonQii

README.md

@@ -130,6 +130,36 @@ alertView.present(duration: 1.5, haptic: .success, completion: nil)
 
 You can remove duration and completion, its have default values.
 
+### SwiftUI
+
+Use like system alert:
+
+* only show message tips
+
+```swift
+Button("Show alert") {
+    showAlert = true
+}.alert(isPresent: $showAlert, message: "this is message only")
+```
+
+* show message, title, image and other configuration
+
+```swift
+Button("Show alert") {
+    showAlert = true
+}.alert(isPresent: $showAlert, 
+        title: "Alert title", 
+        message: "Alert message",
+        duration: 2.0, 
+        dismissOnTap: false, 
+        present: .custom(UIImage(systemName: "heart")!), 
+        haptic: .success, 
+        layout: .init(), 
+        completion: {
+            print("Alert is destory")
+        })
+```
+
 ## Other Projects
 
 #### [SPPermissions](https://github.com/ivanvorobei/SPPermissions)

Sources/SPAlert/SwiftUI/SwiftUIAlert.swift

@@ -0,0 +1,60 @@
+//
+//  SwiftUIView.swift
+//  
+//
+//  Created by Qi Hon on 2021/6/4.
+//
+
+import SwiftUI
+
+@available(iOS 13.0, *)
+extension View {
+    public func alert(
+        isPresent: Binding<Bool>,
+        alertView: SPAlertView,
+        duration: TimeInterval = 2.0,
+        haptic: SPAlertHaptic = .none
+    ) -> some View {
+        if isPresent.wrappedValue {
+            let alertCompletion = alertView.completion
+            let alertDismiss = {
+                isPresent.wrappedValue = false
+                alertCompletion?()
+            }
+            alertView.present(duration: duration, haptic: haptic, completion: alertDismiss)
+        }
+        return self
+    }
+    
+    public func alert(isPresent: Binding<Bool>,
+               title: String = "",
+               message: String? = nil,
+               duration: TimeInterval = 2.0,
+               dismissOnTap: Bool = true,
+               present: SPAlertIconPreset = .done,
+               haptic: SPAlertHaptic = .none,
+               layout: SPAlertLayout = .init(),
+               completion: (()-> Void)? = nil
+    ) -> some View {
+        let alertView = SPAlertView(title: title, message: message, preset: present)
+        alertView.dismissByTap = dismissOnTap
+        alertView.layout = layout
+        alertView.completion = completion
+        
+        return alert(isPresent: isPresent, alertView: alertView, duration: duration, haptic: haptic)
+    }
+    
+    public func alert(isPresent: Binding<Bool>,
+               message: String,
+               duration: TimeInterval = 2.0,
+               dismissOnTap: Bool = true,
+               haptic: SPAlertHaptic = .none,
+               completion: (()-> Void)? = nil
+    ) -> some View {
+        let alertView = SPAlertView(message: message)
+        alertView.dismissByTap = dismissOnTap
+        alertView.completion = completion
+        
+        return alert(isPresent: isPresent, alertView: alertView, duration: duration, haptic: haptic)
+    }
+}