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-rw-r--r--platform/darwin/src/MGLVectorStyleLayer.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/platform/darwin/src/MGLVectorStyleLayer.h b/platform/darwin/src/MGLVectorStyleLayer.h
index e2a755083f..e0980af44d 100644
--- a/platform/darwin/src/MGLVectorStyleLayer.h
+++ b/platform/darwin/src/MGLVectorStyleLayer.h
@@ -122,6 +122,12 @@ NS_ASSUME_NONNULL_BEGIN
value specified in the predicate. Also, operator modifiers `c`, `d`, and the
combined `cd` for case and diacritic insensitivity are unsupported for
comparison and aggregate operators that are used in the predicate.
+
+ It is possible to create expressions that contain special characters in the
+ predicate format syntax. This includes the `$` in the `$id` and `$type` special
+ style attributes and also `hyphen-minus` and `tag:subtag`. However, you must use
+ `%K` in the format string to represent these variables:
+ `@"%K == 'LineString'", @"$type"`.
*/
@property (nonatomic, nullable) NSPredicate *predicate;