fix(ios): abnormal onFooterPulling callback

renderer/native/ios/renderer/component/footerrefresh/HippyFooterRefresh.m

@@ -22,46 +22,49 @@
 
 #import "HippyFooterRefresh.h"
 
+static NSString *const kContentSizeKey = @"contentSize";
+static NSString *const kContentOffsetParamKey = @"contentOffset";
+
 @implementation HippyFooterRefresh
 
 - (void)setScrollView:(UIScrollView *)scrollView {
     [super setScrollView:scrollView];
-    [scrollView addObserver:self forKeyPath:@"contentSize" options:NSKeyValueObservingOptionNew context:NULL];
+    [scrollView addObserver:self forKeyPath:kContentSizeKey options:NSKeyValueObservingOptionNew context:NULL];
 }
 
 - (void)unsetFromScrollView {
-    [_scrollView removeObserver:self forKeyPath:@"contentSize"];
+    [_scrollView removeObserver:self forKeyPath:kContentSizeKey];
     [super unsetFromScrollView];
 }
 
 - (void)observeValueForKeyPath:(NSString *)keyPath
                       ofObject:(id)object
                         change:(NSDictionary<NSKeyValueChangeKey, id> *)change
                        context:(void *)context {
-    if ([keyPath isEqualToString:@"contentSize"]) {
+    if ([keyPath isEqualToString:kContentSizeKey]) {
         NSValue *sizeValue = change[@"new"];
         CGSize size = [sizeValue CGSizeValue];
         self.frame = CGRectMake(0, size.height, CGRectGetWidth(self.bounds), CGRectGetHeight(self.bounds));
     }
 }
 
-- (void)scrollViewDidScroll {
-    if (_scrollView && _scrollView.contentSize.height > 0) {
-        if (self.onFooterPulling && HippyRefreshStatusStartLoading != [self status] && HippyRefreshStatusFinishLoading != [self status]) {
-            CGFloat offset = _scrollView.contentOffset.y;
-            if (offset >= 0) {
-                self.onFooterPulling(@{ @"contentOffset": @(offset) });
+- (void)scrollViewDidScroll:(UIScrollView *)scrollView {
+    CGFloat contentSizeHeight = scrollView.contentSize.height;
+    if (self.onFooterPulling && contentSizeHeight > 0) {
+        if (HippyRefreshStatusStartLoading != [self status] &&
+            HippyRefreshStatusFinishLoading != [self status]) {
+            CGFloat offset = scrollView.contentOffset.y;
+            if (offset >= (contentSizeHeight - CGRectGetHeight(scrollView.bounds))) {
+                self.onFooterPulling(@{ kContentOffsetParamKey : @(offset) });
             }
         }
     }
 }
 
-- (void)scrollViewDidEndDragging {
-    if (_scrollView) {
-        CGFloat offset = _scrollView.contentOffset.y;
-        if (offset > _scrollView.contentSize.height - CGRectGetHeight(_scrollView.bounds) + CGRectGetHeight(self.bounds)) {
-            self.status = HippyRefreshStatusStartLoading;
-        }
+- (void)scrollViewDidEndDragging:(UIScrollView *)scrollView {
+    CGFloat offset = scrollView.contentOffset.y;
+    if (offset >= scrollView.contentSize.height - CGRectGetHeight(scrollView.bounds) + CGRectGetHeight(self.bounds)) {
+        self.status = HippyRefreshStatusStartLoading;
     }
 }
 
@@ -90,7 +93,7 @@ - (void)setStatus:(HippyRefreshStatus)status {
             } completion:^(BOOL finished) {
                 if (self.onFooterReleased) {
                     CGFloat offset = self.scrollView.contentOffset.y;
-                    self.onFooterReleased(@{@"contentOffset": @(offset)});
+                    self.onFooterReleased(@{ kContentOffsetParamKey : @(offset) });
                 }
             }];
         } break;

renderer/native/ios/renderer/component/headerrefresh/HippyHeaderRefresh.m

@@ -22,6 +22,8 @@
 
 #import "HippyHeaderRefresh.h"
 
+static NSString *const kContentOffsetParamKey = @"contentOffset";
+
 @implementation HippyHeaderRefresh
 
 - (void)setFrame:(CGRect)frame {
@@ -34,23 +36,24 @@ - (void)setFrame:(CGRect)frame {
     [super setFrame:properFrame];
 }
 
-- (void)scrollViewDidScroll {
-    if (_scrollView) {
-        if (self.onHeaderPulling && HippyRefreshStatusStartLoading != [self status] && HippyRefreshStatusFinishLoading != [self status]) {
-            CGFloat offset = _scrollView.contentOffset.y;
-            if (offset <= 0) {
-                self.onHeaderPulling(@{ @"contentOffset": @(-offset) });
-            }
+- (void)scrollViewDidScroll:(UIScrollView *)scrollView {
+    if (self.onHeaderPulling &&
+        HippyRefreshStatusStartLoading != [self status] &&
+        HippyRefreshStatusFinishLoading != [self status]) {
+        CGFloat offset = scrollView.contentOffset.y;
+        if (offset <= 0) {
+            self.onHeaderPulling(@{ kContentOffsetParamKey : @(-offset) });
         }
     }
-    // Section cell will stick in wrong position while header is still refresh. in this scenario，the scrollview inset need to be reset.
-    if ([self status] == HippyRefreshStatusStartLoading || [self status] == HippyRefreshStatusFinishLoading) {
+    // Section cell will stick in wrong position while header is still refresh. 
+    // in this scenario，the scrollview inset need to be reset.
+    if ([self status] == HippyRefreshStatusStartLoading || 
+        [self status] == HippyRefreshStatusFinishLoading) {
         [self resetInset];
     }
 }
 
-- (void)resetInset
-{
+- (void)resetInset {
     CGFloat insetT = - self.scrollView.contentOffset.y > 0 ? - self.scrollView.contentOffset.y : 0;
     insetT = insetT > self.frame.size.height ? self.frame.size.height : insetT;
 
@@ -69,8 +72,8 @@ - (void)refresh {
     }];
 }
 
-- (void)scrollViewDidEndDragging {
-    if (_scrollView && -_scrollView.contentOffset.y > CGRectGetHeight(self.bounds)) {
+- (void)scrollViewDidEndDragging:(UIScrollView *)scrollView {
+    if (scrollView && -scrollView.contentOffset.y > CGRectGetHeight(self.bounds)) {
         self.status = HippyRefreshStatusStartLoading;
     }
 }
@@ -95,7 +98,7 @@ - (void)setStatus:(HippyRefreshStatus)status {
             } completion:^(BOOL finished) {
                 if (self.onHeaderReleased) {
                     CGFloat offset = self.scrollView.contentOffset.y;
-                    self.onHeaderReleased(@{@"contentOffset": @(offset)});
+                    self.onHeaderReleased(@{ kContentOffsetParamKey : @(offset) });
                 }
             }];
         } break;

renderer/native/ios/renderer/component/refresh/HippyRefresh.h

@@ -55,8 +55,12 @@ typedef NS_ENUM(NSUInteger, HippyRefreshStatus) {
 
 - (void)unsetFromScrollView;
 
-- (void)scrollViewDidEndDragging;
-- (void)scrollViewDidScroll;
+/// Called when UIScrollView's scrollViewDidEndDragging triggers
+- (void)scrollViewDidEndDragging:(UIScrollView *)scrollView;
+
+/// Called when UIScrollView's scrollViewDidScroll triggers
+/// - Parameter scrollView: UIScrollView
+- (void)scrollViewDidScroll:(UIScrollView *)scrollView;
 
 - (void)refresh;
 - (void)refreshFinish;

renderer/native/ios/renderer/component/refresh/HippyRefresh.m

@@ -34,10 +34,12 @@ - (void)unsetFromScrollView {
     [self removeFromSuperview];
 }
 
-- (void)scrollViewDidScroll {
+- (void)scrollViewDidScroll:(UIScrollView *)scrollView {
+    // nop
 }
 
-- (void)scrollViewDidEndDragging {
+- (void)scrollViewDidEndDragging:(UIScrollView *)scrollView {
+    //nop
 }
 
 - (void)setStatus:(HippyRefreshStatus)status {

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

@@ -417,8 +417,8 @@ - (void)scrollViewDidScroll:(UIScrollView *)scrollView {
             [scrollViewListener scrollViewDidScroll:scrollView];
         }
     }
-    [_headerRefreshView scrollViewDidScroll];
-    [_footerRefreshView scrollViewDidScroll];
+    [_headerRefreshView scrollViewDidScroll:scrollView];
+    [_footerRefreshView scrollViewDidScroll:scrollView];
 }
 
 - (NSDictionary *)scrollEventDataWithState:(NativeRenderScrollState)state {
@@ -517,8 +517,8 @@ - (void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL
         }
     }
 
-    [_headerRefreshView scrollViewDidEndDragging];
-    [_footerRefreshView scrollViewDidEndDragging];
+    [_headerRefreshView scrollViewDidEndDragging:scrollView];
+    [_footerRefreshView scrollViewDidEndDragging:scrollView];
 }
 
 - (void)scrollViewWillBeginDecelerating:(UIScrollView *)scrollView {