fix(ios): listview performance optimization and bug fix

framework/examples/ios-demo/podfile

@@ -5,8 +5,8 @@ install! 'cocoapods',
          :deterministic_uuids => false,
          :generate_multiple_pod_projects => true
 
-#use_frameworks! :linkage => :static  # 静态库framework格式
-#ENV["use_frameworks"] = "true" # for hippy when set use_frameworks!
+use_frameworks! :linkage => :static  # 静态库framework格式
+ENV["use_frameworks"] = "true" # for hippy when set use_frameworks!
 
 workspace 'HippyDemo.xcworkspace'
 

renderer/native/ios/renderer/component/listview/NativeRenderBaseListViewDataSource.mm

@@ -166,7 +166,17 @@ - (void)applyDiff:(NativeRenderBaseListViewDataSource *)another
         completion(YES);
         return;
     }
-//    NSArray<NSInvocation *> *batchUpdateInvocations = [self cellViewChangeInvocation:another context:context forCollectionView:view];
+
+    // Attention, we do partial reload only when 1 item change!
+    // because differential refreshing causes the display event of the cell to not trigger,
+    // So we limit this to when only one cell is updated
+    if (context.allChangedItems.count > 1) {
+        [view reloadData];
+        completion(YES);
+        return;
+    }
+
+    // The following logic is not perfect and needs to be further refined
     NSMutableArray<NSInvocation *> *batchUpdate = [NSMutableArray arrayWithCapacity:8];
     [self cellDiffFromAnother:another
                sectionStartAt:0

renderer/native/ios/renderer/component/waterfalllist/NativeRenderObjectWaterfall.h

@@ -32,8 +32,15 @@ NS_ASSUME_NONNULL_BEGIN
 - (NSSet<__kindof HippyShadowView *> *)deletedItems;
 - (NSHashTable<__kindof HippyShadowView *> *)movedItems;
 
+/// Clear all items recorded.
 - (void)clear;
 
+/// Whether has changed item.
+- (BOOL)hasChanges;
+
+/// Get all chaned items.
+- (NSSet<HippyShadowView *> *)allChangedItems;
+
 @end
 
 @interface NativeRenderObjectWaterfall : HippyShadowView<NativeRenderObjectWaterfallItemFrameChangedProtocol>

renderer/native/ios/renderer/component/waterfalllist/NativeRenderObjectWaterfall.mm

@@ -73,9 +73,8 @@ - (void)appendMovedItem:(__kindof HippyShadowView *)objectView {
 }
 
 - (void)appendFrameChangedItem:(__kindof HippyShadowView *)objectView {
-    if (![_addedItems containsObject:objectView]) {
-        [_frameChangedItems addObject:objectView];
-    }
+    // _frameChangedItems may be also in other addedItems/movedItems
+    [_frameChangedItems addObject:objectView];
 }
 
 - (NSSet<__kindof HippyShadowView *> *)deletedItems {
@@ -94,6 +93,20 @@ - (void)appendFrameChangedItem:(__kindof HippyShadowView *)objectView {
     return [_frameChangedItems copy];
 }
 
+- (BOOL)hasChanges {
+    return _addedItems.count != 0 || _deletedItems.count != 0 ||
+    _movedItems.count != 0 || _frameChangedItems.count != 0;
+}
+
+- (NSSet<HippyShadowView *> *)allChangedItems {
+    NSMutableSet *allChanges = [NSMutableSet set];
+    [allChanges addObjectsFromArray:_addedItems.allObjects];
+    [allChanges addObjectsFromArray:_deletedItems.allObjects];
+    [allChanges addObjectsFromArray:_movedItems.allObjects];
+    [allChanges addObjectsFromArray:_frameChangedItems.allObjects];
+    return allChanges;
+}
+
 - (void)clear {
     [_deletedItems removeAllObjects];
     [_addedItems removeAllObjects];
@@ -162,27 +175,28 @@ - (void)itemFrameChanged:(__kindof NativeRenderObjectWaterfallItem *)item {
 }
 
 - (void)amendLayoutBeforeMount:(NSMutableSet<NativeRenderApplierBlock> *)blocks {
-    if ([self isPropagationDirty:NativeRenderUpdateLifecycleLayoutDirtied]) {
-        __weak NativeRenderObjectWaterfall *weakSelf = self;
+    if ([self isPropagationDirty:NativeRenderUpdateLifecycleLayoutDirtied] &&
+        _itemChangeContext.hasChanges) {
         WaterfallItemChangeContext *context = [_itemChangeContext copy];
         NSArray<HippyShadowView *> *dataSource = [self.subcomponents copy];
+        __weak __typeof(self)weakSelf = self;
         NativeRenderApplierBlock block = ^void(NSDictionary<NSNumber *, UIView *> *viewRegistry) {
-            NativeRenderObjectWaterfall *strongSelf = weakSelf;
+            __strong __typeof(weakSelf)strongSelf = weakSelf;
             if (!strongSelf) {
                 return;
             }
             NativeRenderWaterfallView *view = (NativeRenderWaterfallView *)[viewRegistry objectForKey:[strongSelf hippyTag]];
             HippyAssert([view isKindOfClass:[NativeRenderWaterfallView class]], @"view must be kind of NativeRenderWaterfallView");
             if ([view isKindOfClass:[NativeRenderWaterfallView class]]) {
                 view.dirtyContent = YES;
-                view.changeContext = [context copy];
+                view.changeContext = context;
                 [view pushDataSource:dataSource];
             }
         };
         [blocks addObject:block];
+        [_itemChangeContext clear];
     }
     [super amendLayoutBeforeMount:blocks];
-    [_itemChangeContext clear];
 }
 
 @end

renderer/native/ios/renderer/component/waterfalllist/NativeRenderWaterfallView.mm

@@ -67,7 +67,7 @@ - (instancetype)initWithFrame:(CGRect)frame {
         _scrollEventThrottle = 100.f;
         _weakItemMap = [NSMapTable strongToWeakObjectsMapTable];
         _cachedItems = [NSMutableDictionary dictionaryWithCapacity:32];
-        _dataSourcePool = [NSMutableArray arrayWithCapacity:8];
+        _dataSourcePool = [NSMutableArray array];
         _dataSourceSem = dispatch_semaphore_create(1);
         [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(didReceiveMemoryWarning) name:UIApplicationDidReceiveMemoryWarningNotification object:nil];
         [self initCollectionView];