diff --git a/PYSearch/NSBundle+PYSearchExtension.h b/PYSearch/NSBundle+PYSearchExtension.h
index ad3b139..b76d073 100644
--- a/PYSearch/NSBundle+PYSearchExtension.h
+++ b/PYSearch/NSBundle+PYSearchExtension.h
@@ -15,7 +15,8 @@
 
 /** 获取PYSearch.bundle路径 */
 + (NSBundle *)py_searchBundle;
-    
-+ (UIImage*)py_imageNamed:(NSString*)name;
+
+/** 获取PYSearch.bundle路径中的图片 */
++ (UIImage *)py_imageNamed:(NSString *)name;
 
 @end
diff --git a/PYSearch/NSBundle+PYSearchExtension.m b/PYSearch/NSBundle+PYSearchExtension.m
index 776524d..d440b2b 100644
--- a/PYSearch/NSBundle+PYSearchExtension.m
+++ b/PYSearch/NSBundle+PYSearchExtension.m
@@ -56,11 +56,9 @@ + (NSString *)py_localizedStringForKey:(NSString *)key value:(NSString *)value
     return [[NSBundle mainBundle] localizedStringForKey:key value:value table:nil];
 }
     
-+ (UIImage*)py_imageNamed:(NSString*)name
++ (UIImage *)py_imageNamed:(NSString *)name
 {
-    UIImage* image = [UIImage imageWithContentsOfFile: [[[NSBundle py_searchBundle] resourcePath] stringByAppendingPathComponent: [NSString stringWithFormat: @"%@.png", name]]];
-    
-    return image;
+    return [UIImage imageWithContentsOfFile:[[[NSBundle py_searchBundle] resourcePath] stringByAppendingPathComponent:[NSString stringWithFormat:@"%@.png", name]]];
 }
 
 @end
diff --git a/PYSearch/PYSearchSuggestionViewController.h b/PYSearch/PYSearchSuggestionViewController.h
index df45f43..99e442a 100644
--- a/PYSearch/PYSearchSuggestionViewController.h
+++ b/PYSearch/PYSearchSuggestionViewController.h
@@ -25,6 +25,7 @@ typedef void(^PYSearchSuggestionDidSelectCellBlock)(UITableViewCell *selectedCel
 @end
 
 @interface PYSearchSuggestionViewController : UITableViewController
+
 /** 搜索建议数据源 */
 @property (nonatomic, weak) id<PYSearchSuggestionViewDataSource> dataSource;
 /** 搜索建议 */
diff --git a/PYSearch/PYSearchSuggestionViewController.m b/PYSearch/PYSearchSuggestionViewController.m
index 8091b11..2c23b20 100644
--- a/PYSearch/PYSearchSuggestionViewController.m
+++ b/PYSearch/PYSearchSuggestionViewController.m
@@ -9,6 +9,7 @@
 #import "PYSearchConst.h"
 
 @interface PYSearchSuggestionViewController ()
+
 /** 记录消失前的contentInset */
 @property (nonatomic, assign) UIEdgeInsets originalContentInset;
 
@@ -74,7 +75,6 @@ - (void)setSearchSuggestions:(NSArray<NSString *> *)searchSuggestions
     self.tableView.contentOffset = CGPointMake(0, -self.tableView.contentInset.top);
 }
 
-
 #pragma mark - Table view data source
 - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
     if ([self.dataSource respondsToSelector:@selector(numberOfSectionsInSearchSuggestionView:)]) {
@@ -105,7 +105,7 @@ - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(N
         cell.textLabel.font = [UIFont systemFontOfSize:14];
         cell.backgroundColor = [UIColor clearColor];
         // 添加分割线
-        UIImageView *line = [[UIImageView alloc] initWithImage: [NSBundle py_imageNamed: @"cell-content-line"]];
+        UIImageView *line = [[UIImageView alloc] initWithImage: [NSBundle py_imageNamed:@"cell-content-line"]];
         line.py_height = 0.5;
         line.alpha = 0.7;
         line.py_x = PYSEARCH_MARGIN;
@@ -114,7 +114,7 @@ - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(N
         [cell.contentView addSubview:line];
     }
     // 设置数据
-    cell.imageView.image = [NSBundle py_imageNamed: @"search"];
+    cell.imageView.image = [NSBundle py_imageNamed:@"search"];
     cell.textLabel.text = self.searchSuggestions[indexPath.row];
     return cell;
 }
diff --git a/PYSearch/PYSearchViewController.m b/PYSearch/PYSearchViewController.m
index 8c3c912..ebcdb43 100644
--- a/PYSearch/PYSearchViewController.m
+++ b/PYSearch/PYSearchViewController.m
@@ -95,7 +95,9 @@ - (void)viewWillAppear:(BOOL)animated
     if (self.navigationController.navigationBar.translucent == NO) {
         self.baseSearchTableView.contentInset = UIEdgeInsetsMake(0, 0, self.view.py_y, 0);
         self.searchSuggestionVC.view.frame = CGRectMake(0, 64 - self.view.py_y, self.view.py_width, self.view.py_height + self.view.py_y);
-        self.navigationController.navigationBar.barTintColor = PYSEARCH_COLOR(249, 249, 249);
+        if (!self.navigationController.navigationBar.barTintColor) { // 用户没有设置
+            self.navigationController.navigationBar.barTintColor = PYSEARCH_COLOR(249, 249, 249);
+        }
     }
 }
 
@@ -184,7 +186,7 @@ - (UIButton *)emptyButton
         emptyButton.titleLabel.font = self.searchHistoryHeader.font;
         [emptyButton setTitleColor:PYTextColor forState:UIControlStateNormal];
         [emptyButton setTitle:[NSBundle py_localizedStringForKey:PYSearchEmptyButtonText] forState:UIControlStateNormal];
-        [emptyButton setImage:[NSBundle py_imageNamed: @"empty"] forState:UIControlStateNormal];
+        [emptyButton setImage:[NSBundle py_imageNamed:@"empty"] forState:UIControlStateNormal];
         [emptyButton addTarget:self action:@selector(emptySearchHistoryDidClick) forControlEvents:UIControlEventTouchUpInside];
         [emptyButton sizeToFit];
         emptyButton.py_width += PYSEARCH_MARGIN;
@@ -314,7 +316,7 @@ - (void)setup
     [titleView addConstraint:xCons];
     [titleView addConstraint:yCons];
     searchBar.placeholder = [NSBundle py_localizedStringForKey:PYSearchSearchPlaceholderText];
-    searchBar.backgroundImage = [NSBundle py_imageNamed: @"clearImage"];
+    searchBar.backgroundImage = [NSBundle py_imageNamed:@"clearImage"];
     searchBar.delegate = self;
     self.searchBar = searchBar;
     
@@ -417,7 +419,7 @@ - (void)setupHotSearchRectangleTags
     self.baseSearchTableView.tableHeaderView.py_height = self.headerView.py_height = MAX(CGRectGetMaxY(self.hotSearchView.frame), CGRectGetMaxY(self.searchHistoryView.frame));
     // 添加分割线
     for (int i = 0; i < PYRectangleTagMaxCol - 1; i++) { // 添加垂直分割线
-        UIImageView *verticalLine = [[UIImageView alloc] initWithImage:[NSBundle py_imageNamed: @"cell-content-line-vertical"]];
+        UIImageView *verticalLine = [[UIImageView alloc] initWithImage:[NSBundle py_imageNamed:@"cell-content-line-vertical"]];
         verticalLine.py_height = contentView.py_height;
         verticalLine.alpha = 0.7;
         verticalLine.py_x = contentView.py_width / PYRectangleTagMaxCol * (i + 1);
@@ -425,7 +427,7 @@ - (void)setupHotSearchRectangleTags
         [contentView addSubview:verticalLine];
     }
     for (int i = 0; i < ceil(((double)self.hotSearches.count / PYRectangleTagMaxCol)) - 1; i++) { // 添加水平分割线, ceil():向上取整函数
-        UIImageView *verticalLine = [[UIImageView alloc] initWithImage:[NSBundle py_imageNamed: @"cell-content-line"]];
+        UIImageView *verticalLine = [[UIImageView alloc] initWithImage:[NSBundle py_imageNamed:@"cell-content-line"]];
         verticalLine.py_height = 0.5;
         verticalLine.alpha = 0.7;
         verticalLine.py_y = rectangleTagH * (i + 1);
@@ -481,7 +483,7 @@ - (void)setupHotSearchRankTags
         [rankTextLabelsM addObject:rankTextLabel];
         [rankView addSubview:rankTextLabel];
         // 添加分割线
-        UIImageView *line = [[UIImageView alloc] initWithImage:[NSBundle py_imageNamed: @"cell-content-line"]];
+        UIImageView *line = [[UIImageView alloc] initWithImage:[NSBundle py_imageNamed:@"cell-content-line"]];
         line.py_height = 0.5;
         line.alpha = 0.7;
         line.py_x = -PYScreenW * 0.5;
@@ -1159,13 +1161,13 @@ - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(N
         UIButton *closetButton = [[UIButton alloc] init];
         // 设置图片容器大小、图片原图居中
         closetButton.py_size = CGSizeMake(cell.py_height, cell.py_height);
-        [closetButton setImage:[NSBundle py_imageNamed: @"close"] forState:UIControlStateNormal];
-        UIImageView *closeView = [[UIImageView alloc] initWithImage:[NSBundle py_imageNamed: @"close"]];
+        [closetButton setImage:[NSBundle py_imageNamed:@"close"] forState:UIControlStateNormal];
+        UIImageView *closeView = [[UIImageView alloc] initWithImage:[NSBundle py_imageNamed:@"close"]];
         [closetButton addTarget:self action:@selector(closeDidClick:) forControlEvents:UIControlEventTouchUpInside];
         closeView.contentMode = UIViewContentModeCenter;
         cell.accessoryView = closetButton;
         // 添加分割线
-        UIImageView *line = [[UIImageView alloc] initWithImage:[NSBundle py_imageNamed: @"cell-content-line"]];
+        UIImageView *line = [[UIImageView alloc] initWithImage:[NSBundle py_imageNamed:@"cell-content-line"]];
         line.py_height = 0.5;
         line.alpha = 0.7;
         line.py_x = PYSEARCH_MARGIN;
@@ -1175,7 +1177,7 @@ - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(N
     }
     
     // 设置数据
-    cell.imageView.image = [NSBundle py_imageNamed: @"search_history"];
+    cell.imageView.image = [NSBundle py_imageNamed:@"search_history"];
     cell.textLabel.text = self.searchHistories[indexPath.row];
     
     return cell;
diff --git a/PYSearch/UIColor+PYSearchExtension.h b/PYSearch/UIColor+PYSearchExtension.h
index 5388643..39130f7 100644
--- a/PYSearch/UIColor+PYSearchExtension.h
+++ b/PYSearch/UIColor+PYSearchExtension.h
@@ -8,6 +8,7 @@
 #import <UIKit/UIKit.h>
 
 @interface UIColor (PYSearchExtension)
+
 /** 根据16进制字符串返回对应颜色 */
 + (instancetype)py_colorWithHexString:(NSString *)hexString;
 
diff --git a/PYSearch/UIView+PYSearchExtension.h b/PYSearch/UIView+PYSearchExtension.h
index d0b684a..a125c4a 100755
--- a/PYSearch/UIView+PYSearchExtension.h
+++ b/PYSearch/UIView+PYSearchExtension.h
@@ -8,6 +8,7 @@
 #import <UIKit/UIKit.h>
 
 @interface UIView (PYSearchExtension)
+
 @property (nonatomic, assign) CGFloat py_x;
 @property (nonatomic, assign) CGFloat py_y;
 @property (nonatomic, assign) CGFloat py_centerX;
@@ -17,10 +18,4 @@
 @property (nonatomic, assign) CGSize  py_size;
 @property (nonatomic, assign) CGPoint py_origin;
 
-/** 设置锚点 */
-- (CGPoint)py_setAnchorPoint:(CGPoint)anchorPoint forView:(UIView *)view;
-
-/** 根据手势触摸点修改相应的锚点，就是沿着触摸点对self做相应的手势操作 */
-- (CGPoint)py_setAnchorPointBaseOnGestureRecognizer:(UIGestureRecognizer *)gr;
-
 @end
diff --git a/PYSearch/UIView+PYSearchExtension.m b/PYSearch/UIView+PYSearchExtension.m
index 8c3d8d7..b7e4225 100755
--- a/PYSearch/UIView+PYSearchExtension.m
+++ b/PYSearch/UIView+PYSearchExtension.m
@@ -89,7 +89,8 @@ - (void)setPy_width:(CGFloat)py_width
     self.frame = frame;
 
 }
-- (CGFloat)py_width
+
+-(CGFloat)py_width
 {
     return self.frame.size.width;
 }
@@ -106,54 +107,4 @@ - (CGPoint)py_origin
     return self.frame.origin;
 }
 
-/** 设置锚点 */
-- (CGPoint)py_setAnchorPoint:(CGPoint)anchorPoint forView:(UIView *)view
-{
-    CGPoint oldOrigin = view.frame.origin;
-    view.layer.anchorPoint = anchorPoint;
-    CGPoint newOrigin = view.frame.origin;
-    
-    CGPoint transition;
-    transition.x = newOrigin.x - oldOrigin.x;
-    transition.y = newOrigin.y - oldOrigin.y;
-    
-    view.center = CGPointMake (view.center.x - transition.x, view.center.y - transition.y);
-    return self.layer.anchorPoint;
-}
-
-/** 根据手势触摸点修改相应的锚点，就是沿着触摸点做相应的手势操作 */
-- (CGPoint)py_setAnchorPointBaseOnGestureRecognizer:(UIGestureRecognizer *)gr
-{
-    // 手势为空 直接返回
-    if (!gr) return CGPointMake(0.5, 0.5);
-    
-    // 创建锚点
-    CGPoint anchorPoint;
-    if ([gr isKindOfClass:[UIPinchGestureRecognizer class]]) { // 捏合手势
-        if (gr.numberOfTouches == 2) {
-            // 当触摸开始时，获取两个触摸点
-            CGPoint point1 = [gr locationOfTouch:0 inView:gr.view];
-            CGPoint point2 = [gr locationOfTouch:1 inView:gr.view];
-            anchorPoint.x = (point1.x + point2.x) / 2 / gr.view.py_width;
-            anchorPoint.y = (point1.y + point2.y) / 2 / gr.view.py_height;
-        }
-    } else if ([gr isKindOfClass:[UITapGestureRecognizer class]]) { // 点击手势
-        // 获取触摸点
-        CGPoint point = [gr locationOfTouch:0 inView:gr.view];
-        
-        CGFloat angle = acosf(gr.view.transform.a);
-        if (ABS(asinf(gr.view.transform.b) + M_PI_2) < 0.01) angle += M_PI;
-        CGFloat width = gr.view.py_width;
-        CGFloat height = gr.view.py_height;
-        if (ABS(angle - M_PI_2) <= 0.01 || ABS(angle - M_PI_2 * 3) <= 0.01) { // 旋转角为90°
-            // width 和 height 对换
-            width = gr.view.py_height;
-            height = gr.view.py_width;
-        }
-        // 如果旋转了
-        anchorPoint.x = point.x / width;
-        anchorPoint.y = point.y / height;
-    };
-    return [self py_setAnchorPoint:anchorPoint forView:self];
-}
 @end
diff --git a/PYSearchExample/PYSearchExample/PYSearchExampleController.m b/PYSearchExample/PYSearchExample/PYSearchExampleController.m
index 5c50067..c1d383c 100644
--- a/PYSearchExample/PYSearchExample/PYSearchExampleController.m
+++ b/PYSearchExample/PYSearchExample/PYSearchExampleController.m
@@ -51,7 +51,7 @@ - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(N
 
 - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
 {
-    // 1.创建热门搜索
+    // 1. 创建热门搜索
     NSArray *hotSeaches = @[@"Java", @"Python", @"Objective-C", @"Swift", @"C", @"C++", @"PHP", @"C#", @"Perl", @"Go", @"JavaScript", @"R", @"Ruby", @"MATLAB"];
     // 2. 创建控制器
     PYSearchViewController *searchViewController = [PYSearchViewController searchViewControllerWithHotSearches:hotSeaches searchBarPlaceholder:NSLocalizedString(@"PYExampleSearchPlaceholderText", @"搜索编程语言") didSearchBlock:^(PYSearchViewController *searchViewController, UISearchBar *searchBar, NSString *searchText) {