Merge pull request #2315 from dreampiggy/improvement_image_transition_user_interaction

Add `UIViewAnimationOptionAllowUserInteraction` as default options for convenient image transition

@@ -62,7 +62,7 @@ typedef void (^SDWebImageTransitionCompletionBlock)(BOOL finished);
 @end
 
 // Convenience way to create transition. Remember to specify the duration if needed.
-// for UIKit, these transition just use the correspond `animationOptions`
+// for UIKit, these transition just use the correspond `animationOptions`. By default we enable `UIViewAnimationOptionAllowUserInteraction` to allow user interaction during transition.
 // for AppKit, these transition use Core Animation in `animations`. So your view must be layer-backed. Set `wantsLayer = YES` before you apply it.
 
 @interface SDWebImageTransition (Conveniences)

@@ -31,7 +31,7 @@
 + (SDWebImageTransition *)fadeTransition {
     SDWebImageTransition *transition = [SDWebImageTransition new];
 #if SD_UIKIT
-    transition.animationOptions = UIViewAnimationOptionTransitionCrossDissolve;
+    transition.animationOptions = UIViewAnimationOptionTransitionCrossDissolve | UIViewAnimationOptionAllowUserInteraction;
 #else
     transition.animations = ^(__kindof NSView * _Nonnull view, NSImage * _Nullable image) {
         CATransition *trans = [CATransition animation];
@@ -45,7 +45,7 @@
 + (SDWebImageTransition *)flipFromLeftTransition {
     SDWebImageTransition *transition = [SDWebImageTransition new];
 #if SD_UIKIT
-    transition.animationOptions = UIViewAnimationOptionTransitionFlipFromLeft;
+    transition.animationOptions = UIViewAnimationOptionTransitionFlipFromLeft | UIViewAnimationOptionAllowUserInteraction;
 #else
     transition.animations = ^(__kindof NSView * _Nonnull view, NSImage * _Nullable image) {
         CATransition *trans = [CATransition animation];
@@ -60,7 +60,7 @@
 + (SDWebImageTransition *)flipFromRightTransition {
     SDWebImageTransition *transition = [SDWebImageTransition new];
 #if SD_UIKIT
-    transition.animationOptions = UIViewAnimationOptionTransitionFlipFromRight;
+    transition.animationOptions = UIViewAnimationOptionTransitionFlipFromRight | UIViewAnimationOptionAllowUserInteraction;
 #else
     transition.animations = ^(__kindof NSView * _Nonnull view, NSImage * _Nullable image) {
         CATransition *trans = [CATransition animation];
@@ -75,7 +75,7 @@
 + (SDWebImageTransition *)flipFromTopTransition {
     SDWebImageTransition *transition = [SDWebImageTransition new];
 #if SD_UIKIT
-    transition.animationOptions = UIViewAnimationOptionTransitionFlipFromTop;
+    transition.animationOptions = UIViewAnimationOptionTransitionFlipFromTop | UIViewAnimationOptionAllowUserInteraction;
 #else
     transition.animations = ^(__kindof NSView * _Nonnull view, NSImage * _Nullable image) {
         CATransition *trans = [CATransition animation];
@@ -90,7 +90,7 @@
 + (SDWebImageTransition *)flipFromBottomTransition {
     SDWebImageTransition *transition = [SDWebImageTransition new];
 #if SD_UIKIT
-    transition.animationOptions = UIViewAnimationOptionTransitionFlipFromBottom;
+    transition.animationOptions = UIViewAnimationOptionTransitionFlipFromBottom | UIViewAnimationOptionAllowUserInteraction;
 #else
     transition.animations = ^(__kindof NSView * _Nonnull view, NSImage * _Nullable image) {
         CATransition *trans = [CATransition animation];
@@ -105,7 +105,7 @@
 + (SDWebImageTransition *)curlUpTransition {
     SDWebImageTransition *transition = [SDWebImageTransition new];
 #if SD_UIKIT
-    transition.animationOptions = UIViewAnimationOptionTransitionCurlUp;
+    transition.animationOptions = UIViewAnimationOptionTransitionCurlUp | UIViewAnimationOptionAllowUserInteraction;
 #else
     transition.animations = ^(__kindof NSView * _Nonnull view, NSImage * _Nullable image) {
         CATransition *trans = [CATransition animation];
@@ -120,7 +120,7 @@
 + (SDWebImageTransition *)curlDownTransition {
     SDWebImageTransition *transition = [SDWebImageTransition new];
 #if SD_UIKIT
-    transition.animationOptions = UIViewAnimationOptionTransitionCurlDown;
+    transition.animationOptions = UIViewAnimationOptionTransitionCurlDown | UIViewAnimationOptionAllowUserInteraction;
 #else
     transition.animations = ^(__kindof NSView * _Nonnull view, NSImage * _Nullable image) {
         CATransition *trans = [CATransition animation];