[TIMOB-23778] (5_5_X) iOS: Provide better error for unsupported blurview-effects

iphone/Classes/TiUIiOSBlurView.m

@@ -38,9 +38,14 @@ -(void)dealloc
 
 -(void)setEffect_:(id)value
 {
-    ENSURE_TYPE(value, NSNumber);
-    [[self blurView] setEffect:[UIBlurEffect effectWithStyle:[TiUtils intValue:value def:UIBlurEffectStyleLight]]];
+    ENSURE_TYPE_OR_NIL(value, NSNumber);
+
+    if (value == nil) {
+        DebugLog(@"[ERROR] The provided value for the Ti.UI.BlurView.effect property is not available in this iOS version.");
+        return;
+    }
 
+    [[self blurView] setEffect:[UIBlurEffect effectWithStyle:[TiUtils intValue:value def:UIBlurEffectStyleLight]]];
     [[self proxy] replaceValue:value forKey:@"effect" notification:NO];
 }
 

iphone/Classes/TiUIiOSProxy.m

@@ -461,47 +461,49 @@ -(void)setAppSupportsShakeToEdit:(NSNumber *)shake
 END_UI_THREAD_PROTECTED_VALUE(appSupportsShakeToEdit)
 
 #ifdef USE_TI_UIIOSBLURVIEW
-- (NSNumber*) BLUR_EFFECT_STYLE_EXTRA_LIGHT
+- (id)BLUR_EFFECT_STYLE_EXTRA_LIGHT
 {
     if ([TiUtils isIOS8OrGreater]) {
         return NUMINTEGER(UIBlurEffectStyleExtraLight);
     }
-    return nil;
+    return [NSNull null];
 }
 
-- (NSNumber* )BLUR_EFFECT_STYLE_LIGHT
+- (id)BLUR_EFFECT_STYLE_LIGHT
 {
     if ([TiUtils isIOS8OrGreater]) {
         return NUMINTEGER(UIBlurEffectStyleLight);
     }
-    return nil;
+    return [NSNull null];
 }
 
-- (NSNumber*) BLUR_EFFECT_STYLE_DARK
+- (id)BLUR_EFFECT_STYLE_DARK
 {
     if ([TiUtils isIOS8OrGreater]) {
         return NUMINTEGER(UIBlurEffectStyleDark);
     }
-    return nil;
+    return [NSNull null];
 }
 
-#if IS_XCODE_8
-- (NSNumber*) BLUR_EFFECT_STYLE_REGULAR
+- (id)BLUR_EFFECT_STYLE_REGULAR
 {
+#if IS_XCODE_8
     if ([TiUtils isIOS10OrGreater]) {
         return NUMINTEGER(UIBlurEffectStyleRegular);
     }
-    return nil;
+#endif
+    return [NSNull null];
 }
 
-- (NSNumber*) BLUR_EFFECT_STYLE_PROMINENT
+- (id)BLUR_EFFECT_STYLE_PROMINENT
 {
+#if IS_XCODE_8
     if ([TiUtils isIOS10OrGreater]) {
         return NUMINTEGER(UIBlurEffectStyleProminent);
     }
-    return nil;
-}
 #endif
+    return [NSNull null];
+}
 #endif
 
 #ifdef USE_TI_UIIOSMENUPOPUP