Add the convenient API support to use SwiftUI transition with ease-in-out duration

Author: dreampiggy

SDWebImageSwiftUI/Classes/Transition/Transition.swift

@@ -18,31 +18,76 @@ extension AnyTransition {
         return AnyTransition.asymmetric(insertion: insertion, removal: removal)
     }
 
+    /// Fade-in transition with duration
+    /// - Parameter duration: transition duration, use ease-in-out
+    /// - Returns: A transition with duration
+    public static func fade(duration: Double) -> AnyTransition {
+        let insertion = AnyTransition.opacity.animation(.easeInOut(duration: duration))
+        let removal = AnyTransition.identity
+        return AnyTransition.asymmetric(insertion: insertion, removal: removal)
+    }
+    
     /// Flip from left transition
     public static var flipFromLeft: AnyTransition {
         let insertion = AnyTransition.move(edge: .leading)
         let removal = AnyTransition.identity
         return AnyTransition.asymmetric(insertion: insertion, removal: removal)
     }
 
+    /// Flip from left transition with duration
+    /// - Parameter duration: transition duration, use ease-in-out
+    /// - Returns: A transition with duration
+    public static func flipFromLeft(duration: Double) -> AnyTransition {
+        let insertion = AnyTransition.move(edge: .leading).animation(.easeInOut(duration: duration))
+        let removal = AnyTransition.identity
+        return AnyTransition.asymmetric(insertion: insertion, removal: removal)
+    }
+    
     /// Flip from right transition
     public static var flipFromRight: AnyTransition {
         let insertion = AnyTransition.move(edge: .trailing)
         let removal = AnyTransition.identity
         return AnyTransition.asymmetric(insertion: insertion, removal: removal)
     }
 
+    /// Flip from right transition with duration
+    /// - Parameter duration: transition duration, use ease-in-out
+    /// - Returns: A transition with duration
+    public static func flipFromRight(duration: Double) -> AnyTransition {
+        let insertion = AnyTransition.move(edge: .trailing).animation(.easeInOut(duration: duration))
+        let removal = AnyTransition.identity
+        return AnyTransition.asymmetric(insertion: insertion, removal: removal)
+    }
+    
     /// Flip from top transition
     public static var flipFromTop: AnyTransition {
         let insertion = AnyTransition.move(edge: .top)
         let removal = AnyTransition.identity
         return AnyTransition.asymmetric(insertion: insertion, removal: removal)
     }
 
+    /// Flip from top transition with duration
+    /// - Parameter duration: transition duration, use ease-in-out
+    /// - Returns: A transition with duration
+    public static func flipFromTop(duration: Double) -> AnyTransition {
+        let insertion = AnyTransition.move(edge: .top).animation(.easeInOut(duration: duration))
+        let removal = AnyTransition.identity
+        return AnyTransition.asymmetric(insertion: insertion, removal: removal)
+    }
+    
     /// Flip from bottom transition
     public static var flipFromBottom: AnyTransition {
         let insertion = AnyTransition.move(edge: .bottom)
         let removal = AnyTransition.identity
         return AnyTransition.asymmetric(insertion: insertion, removal: removal)
     }
+    
+    /// Flip from bottom transition with duration
+    /// - Parameter duration: transition duration, use ease-in-out
+    /// - Returns: A transition with duration
+    public static func flipFromBottom(duration: Double) -> AnyTransition {
+        let insertion = AnyTransition.move(edge: .bottom).animation(.easeInOut(duration: duration))
+        let removal = AnyTransition.identity
+        return AnyTransition.asymmetric(insertion: insertion, removal: removal)
+    }
 }