diff --git a/ZYGLaunchIntroductionDemo/LaunchIntroduction/LaunchIntroductionView.m b/ZYGLaunchIntroductionDemo/LaunchIntroduction/LaunchIntroductionView.m
index 85b7041..73fa11f 100644
--- a/ZYGLaunchIntroductionDemo/LaunchIntroduction/LaunchIntroductionView.m
+++ b/ZYGLaunchIntroductionDemo/LaunchIntroduction/LaunchIntroductionView.m
@@ -23,14 +23,13 @@ @implementation LaunchIntroductionView
 BOOL isScrollOut;//在最后一页再次滑动是否隐藏引导页
 CGRect enterBtnFrame;
 NSString *enterBtnImage;
-static LaunchIntroductionView *launch = nil;
 NSString *storyboard;
 
 #pragma mark - 创建对象-->>不带button
 +(instancetype)sharedWithImages:(NSArray *)imageNames{
     images = imageNames;
     isScrollOut = YES;
-    launch = [[LaunchIntroductionView alloc] initWithFrame:CGRectMake(0, 0, kScreen_width, kScreen_height)];
+    LaunchIntroductionView *launch = [[LaunchIntroductionView alloc] initWithFrame:CGRectMake(0, 0, kScreen_width, kScreen_height)];
     launch.backgroundColor = [UIColor whiteColor];
     return launch;
 }
@@ -41,7 +40,7 @@ +(instancetype)sharedWithImages:(NSArray *)imageNames buttonImage:(NSString *)bu
     isScrollOut = NO;
     enterBtnFrame = frame;
     enterBtnImage = buttonImageName;
-    launch = [[LaunchIntroductionView alloc] initWithFrame:CGRectMake(0, 0, kScreen_width, kScreen_height)];
+    LaunchIntroductionView *launch = [[LaunchIntroductionView alloc] initWithFrame:CGRectMake(0, 0, kScreen_width, kScreen_height)];
     launch.backgroundColor = [UIColor whiteColor];
     return launch;
 }
@@ -50,7 +49,7 @@ + (instancetype)sharedWithStoryboardName:(NSString *)storyboardName images:(NSAr
     images = imageNames;
     storyboard = storyboardName;
     isScrollOut = YES;
-    launch = [[LaunchIntroductionView alloc] initWithFrame:CGRectMake(0, 0, kScreen_width, kScreen_height)];
+    LaunchIntroductionView *launch = [[LaunchIntroductionView alloc] initWithFrame:CGRectMake(0, 0, kScreen_width, kScreen_height)];
     launch.backgroundColor = [UIColor whiteColor];
     return launch;
 }
@@ -61,7 +60,7 @@ + (instancetype)sharedWithStoryboard:(NSString *)storyboardName images:(NSArray
     enterBtnFrame = frame;
     storyboard = storyboardName;
     enterBtnImage = buttonImageName;
-    launch = [[LaunchIntroductionView alloc] initWithFrame:CGRectMake(0, 0, kScreen_width, kScreen_height)];
+    LaunchIntroductionView *launch = [[LaunchIntroductionView alloc] initWithFrame:CGRectMake(0, 0, kScreen_width, kScreen_height)];
     launch.backgroundColor = [UIColor whiteColor];
     return launch;
 }
@@ -194,4 +193,10 @@ -(void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NS
     }
 }
 
+- (void)dealloc
+{
+    [self removeObserver:self forKeyPath:@"currentColor"];
+    [self removeObserver:self forKeyPath:@"nomalColor"];
+}
+
 @end