diff --git a/LTNavigationBar/BGColorDemoViewController.m b/LTNavigationBar/BGColorDemoViewController.m
index 87cca77..cef1580 100644
--- a/LTNavigationBar/BGColorDemoViewController.m
+++ b/LTNavigationBar/BGColorDemoViewController.m
@@ -9,7 +9,7 @@
 #import "BGColorDemoViewController.h"
 #import "UINavigationBar+Awesome.h"
 
-#define NAVBAR_CHANGE_POINT 50
+#define NAVBAR_CHANGE_POINT self.tableView.tableHeaderView.frame.size.height - self.tableView.contentInset.top * 2
 
 @interface BGColorDemoViewController ()<UITableViewDataSource,UITableViewDelegate>
 @property (weak, nonatomic) IBOutlet UITableView *tableView;
@@ -23,18 +23,30 @@ - (void)viewDidLoad {
     self.tableView.dataSource = self;
     [self.tableView registerClass:[UITableViewCell class] forCellReuseIdentifier:@"Cell"];
     [self.navigationController.navigationBar lt_setBackgroundColor:[UIColor clearColor]];
+	// 是否缩放变形
+	[self.tableView.tableHeaderView.subviews lastObject].contentMode = UIViewContentModeScaleAspectFill;
 }
 
 - (void)scrollViewDidScroll:(UIScrollView *)scrollView
 {
-    UIColor * color = [UIColor colorWithRed:0/255.0 green:175/255.0 blue:240/255.0 alpha:1];
-    CGFloat offsetY = scrollView.contentOffset.y;
-    if (offsetY > NAVBAR_CHANGE_POINT) {
-        CGFloat alpha = MIN(1, 1 - ((NAVBAR_CHANGE_POINT + 64 - offsetY) / 64));
-        [self.navigationController.navigationBar lt_setBackgroundColor:[color colorWithAlphaComponent:alpha]];
-    } else {
-        [self.navigationController.navigationBar lt_setBackgroundColor:[color colorWithAlphaComponent:0]];
-    }
+	UIColor * color = [UIColor colorWithRed:0/255.0 green:175/255.0 blue:240/255.0 alpha:1];
+	CGFloat offsetY = scrollView.contentOffset.y;
+	UIView *headerImage = [self.tableView.tableHeaderView.subviews lastObject];
+	if (offsetY > NAVBAR_CHANGE_POINT) { // 渐变色
+		CGFloat alpha = MIN(1, 1 - ((NAVBAR_CHANGE_POINT + 64 - offsetY) / 64));
+		[self.navigationController.navigationBar lt_setBackgroundColor:[color colorWithAlphaComponent:alpha]];
+	} else { //  纯色
+		[self.navigationController.navigationBar lt_setBackgroundColor:[color colorWithAlphaComponent:0]];
+		if (offsetY < - self.tableView.contentInset.top) { // 到顶了还下拉
+			// 缩放方式二：
+			// CGFloat scale = 1 - (offsetY + self.tableView.contentInset.top)/500;
+			// headerImage.transform = CGAffineTransformMakeScale(scale, scale);
+			CGRect frame = headerImage.frame;
+			frame.origin.y = offsetY;
+			frame.size.height = -offsetY + self.tableView.tableHeaderView.frame.size.height;
+			headerImage.frame = frame;
+		}
+	}
 }
 
 - (void)viewWillAppear:(BOOL)animated