解决标题频繁变动时可能崩溃

Xiexingda · Apr 2, 2021 · f87714b · f87714b
1 parent 2b3223f
commit f87714b
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Showing 2 changed files with 7 additions and 5 deletions.
diff --git a/XDPagesView.podspec b/XDPagesView.podspec
@@ -15,7 +15,7 @@ Pod::Spec.new do |s|
   #  summary should be tweet-length, and the description more in depth.
   #
   s.name         = "XDPagesView"
-  s.version      = "2.1.8"
+  s.version      = "2.1.9"
   s.summary      = "多控制器列表"
   # This description is used to generate tags and improve search results.
   #   * Think: What does it do? Why did you write it? What is the focus?

diff --git a/XDPagesView/XDPagesCell.m b/XDPagesView/XDPagesCell.m
@@ -122,11 +122,13 @@ - (void)setKVOForCurrentPage:(NSInteger)currentPage {
 
     [self clearKVO];
 
-    for (UIScrollView *child in [self.pagesCache scrollViewsForTitle:self.pagesCache.titles[currentPage]]) {
-        [child addObserver:self forKeyPath:@"contentOffset" options:NSKeyValueObservingOptionOld|NSKeyValueObservingOptionNew context:nil];
+    NSArray<UIScrollView *>* childs = [self.pagesCache scrollViewsForTitle:self.pagesCache.titles[currentPage]];
+    if (childs && childs.count) {
+        for (UIScrollView *child in childs) {
+            [child addObserver:self forKeyPath:@"contentOffset" options:NSKeyValueObservingOptionOld|NSKeyValueObservingOptionNew context:nil];
+        }
+        [self.pagesCache.kvoTitles addObject:self.pagesCache.titles[currentPage]];
     }
-
-    [self.pagesCache.kvoTitles addObject:self.pagesCache.titles[currentPage]];
 }
 
 // 配置所有标题