#fix issues #7

amisare · Dec 26, 2018 · ef8e0ca · ef8e0ca
1 parent a941a2d
commit ef8e0ca
Showing 1 changed file with 12 additions and 3 deletions.
diff --git a/NNNavigationBar/TintColor/Transition/UINavigationBar+NNTransitionForTintColor.m b/NNNavigationBar/TintColor/Transition/UINavigationBar+NNTransitionForTintColor.m
@@ -34,12 +34,18 @@ - (instancetype)initWithNavigationBar:(UINavigationBar *)bar {
 
 - (void)nn_startTransitionWithParams:(NSDictionary *)params {
     UINavigationItem *item = [params objectForKey:@"item"];
-    self.bar.tintColor = [self nn_tintColorFromeBar:self.bar atItem:item];
+    UIColor *tintColor = [self nn_tintColorFromeBar:self.bar atItem:item];
+    if (tintColor) {
+        self.bar.tintColor = tintColor;
+    }
 }
 
 - (void)nn_endTransitionWithParams:(NSDictionary *)params {
     UINavigationItem *item = [params objectForKey:@"item"];
-    self.bar.tintColor = [self nn_tintColorFromeBar:self.bar atItem:item];
+    UIColor *tintColor = [self nn_tintColorFromeBar:self.bar atItem:item];
+    if (tintColor) {
+        self.bar.tintColor = tintColor;
+    }
 }
 
 - (void)nn_updateInteractiveTransitionWithParams:(NSDictionary *)params {
@@ -48,7 +54,10 @@ - (void)nn_updateInteractiveTransitionWithParams:(NSDictionary *)params {
 
 - (void)nn_endInteractiveTransitionWithParams:(NSDictionary *)params {
     UINavigationItem *item = [params objectForKey:@"item"];
-    self.bar.tintColor = [self nn_tintColorFromeBar:self.bar atItem:item];
+    UIColor *tintColor = [self nn_tintColorFromeBar:self.bar atItem:item];
+    if (tintColor) {
+        self.bar.tintColor = tintColor;
+    }
 }
 
 #pragma clang diagnostic push