add 2.5.0 version

Author: candyan

.clang-format

@@ -0,0 +1,32 @@
+BasedOnStyle: LLVM
+IndentWidth: 4
+UseTab: Never
+
+---
+Language: Cpp
+# Force Cpp style
+
+ColumnLimit: 120
+MaxEmptyLinesToKeep: 1
+IndentCaseLabels: true
+
+BreakBeforeBraces: Linux
+BreakBeforeTernaryOperators: true
+BreakConstructorInitializersBeforeComma: true
+
+AllowShortIfStatementsOnASingleLine: false
+AllowShortFunctionsOnASingleLine: false
+AllowShortBlocksOnASingleLine: false
+AllowShortLoopsOnASingleLine: false
+AllowShortCaseLabelsOnASingleLine: false
+
+PointerAlignment: Right
+
+ObjCSpaceAfterProperty: true
+ObjCSpaceBeforeProtocolList: true
+
+SpaceBeforeParens: ControlStatements
+SpacesInParentheses: false
+SpacesInContainerLiterals: true
+SpaceInEmptyParentheses: false
+---

Source/YAInfiniteScroll/YAInfiniteScroll.m

@@ -35,10 +35,23 @@ - (instancetype)initWithScrollView:(UIScrollView *)scrollView
     self = [self init];
     if (self) {
         _scrollView = scrollView;
+
+        [_scrollView addObserver:self forKeyPath:@"contentSize" options:NSKeyValueObservingOptionNew context:NULL];
     }
     return self;
 }
 
+- (void)dealloc
+{
+    @try {
+        [_scrollView removeObserver:self forKeyPath:@"contentSize" context:NULL];
+    }
+    @catch (NSException *exception)
+    {
+        NSLog(@"%@", exception);
+    }
+}
+
 #pragma mark - Property
 
 - (void)setLoadMoreFooterView:(UIView *)loadMoreFooterView
@@ -77,7 +90,7 @@ - (void)scrollViewDidScroll:(UIScrollView *)scrollView
     if (_bottomStick && self.loadingMore == NO) {
         [self.loadMoreFooterView setFrameOriginY:MAX(scrollView.contentSize.height,
                                                      scrollView.contentOffset.y + CGRectGetHeight(scrollView.bounds) -
-                                                     self.loadMoreFooterView.bounds.size.height)];
+                                                         self.loadMoreFooterView.bounds.size.height)];
     } else {
         [self.loadMoreFooterView setFrameOriginY:scrollView.contentSize.height];
     }

YAUIKit.podspec

@@ -1,7 +1,7 @@
 Pod::Spec.new do |s|
 
   s.name         = 'YAUIKit'
-  s.version      = '2.4.5'
+  s.version      = '2.5.0'
   s.summary      = 'YAUIKit'
   s.homepage     = 'https://github.com/candyan/YAUIKit'
   s.license      = 'MIT'