Little fix

Little fix

MJRefresh.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
     s.name         = 'MJRefresh'
-    s.version      = '3.1.15.3'
+    s.version      = '3.1.15.4'
     s.summary      = 'An easy way to use pull-to-refresh'
     s.homepage     = 'https://github.com/CoderMJLee/MJRefresh'
     s.license      = 'MIT'

MJRefresh/Base/MJRefreshHeader.m

@@ -147,8 +147,6 @@ - (NSDate *)lastUpdatedTime
     return [[NSUserDefaults standardUserDefaults] objectForKey:self.lastUpdatedTimeKey];
 }
 
-#pragma mark - 私有方法
-
 - (void)setIgnoredScrollViewContentInsetTop:(CGFloat)ignoredScrollViewContentInsetTop {
     _ignoredScrollViewContentInsetTop = ignoredScrollViewContentInsetTop;
     

MJRefresh/UIScrollView+MJExtension.m

@@ -19,7 +19,7 @@ @implementation UIScrollView (MJExtension)
 + (void)load
 {
     // 缓存判断值
-    gt_ios_11_ = [[[UIDevice currentDevice] systemVersion] compare:@"11.0" options:NSNumericSearch] != NSOrderedAscending;
+    gt_ios_11_ = ([[[UIDevice currentDevice] systemVersion] compare:@"11" options:NSNumericSearch] != NSOrderedAscending);
 }
 
 - (UIEdgeInsets)mj_inset

MJRefresh/UIScrollView+MJRefresh.m

@@ -38,10 +38,8 @@ - (void)setMj_header:(MJRefreshHeader *)mj_header
         [self insertSubview:mj_header atIndex:0];
         
         // 存储新的
-        [self willChangeValueForKey:@"mj_header"]; // KVO
         objc_setAssociatedObject(self, &MJRefreshHeaderKey,
                                  mj_header, OBJC_ASSOCIATION_ASSIGN);
-        [self didChangeValueForKey:@"mj_header"]; // KVO
     }
 }
 
@@ -60,10 +58,8 @@ - (void)setMj_footer:(MJRefreshFooter *)mj_footer
         [self insertSubview:mj_footer atIndex:0];
         
         // 存储新的
-        [self willChangeValueForKey:@"mj_footer"]; // KVO
         objc_setAssociatedObject(self, &MJRefreshFooterKey,
                                  mj_footer, OBJC_ASSOCIATION_ASSIGN);
-        [self didChangeValueForKey:@"mj_footer"]; // KVO
     }
 }