diff options
Diffstat (limited to 'platform/darwin/src/MGLVectorStyleLayer.h')
-rw-r--r-- | platform/darwin/src/MGLVectorStyleLayer.h | 105 |
1 files changed, 3 insertions, 102 deletions
diff --git a/platform/darwin/src/MGLVectorStyleLayer.h b/platform/darwin/src/MGLVectorStyleLayer.h index 6603570e25..7780a34c7f 100644 --- a/platform/darwin/src/MGLVectorStyleLayer.h +++ b/platform/darwin/src/MGLVectorStyleLayer.h @@ -34,108 +34,9 @@ MGL_EXPORT comes from the style, its predicate corresponds to the <a href="https://www.mapbox.com/mapbox-gl-style-spec/#layer-filter">`filter`</a> property in the style JSON. - - The following comparison operators are supported. - - <ul> - <li><code>NSEqualToPredicateOperatorType</code> (<code>=</code>, <code>==</code>)</li> - <li><code>NSGreaterThanOrEqualToPredicateOperatorType</code> (<code>>=</code>, <code>=></code>)</li> - <li><code>NSLessThanOrEqualToPredicateOperatorType</code> (<code><=</code>, <code>=<</code>)</li> - <li><code>NSGreaterThanPredicateOperatorType</code> (<code>></code>)</li> - <li><code>NSLessThanPredicateOperatorType</code> (<code><</code>)</li> - <li><code>NSNotEqualToPredicateOperatorType</code> (<code>!=</code>, <code><></code>)</li> - <li><code>NSBetweenPredicateOperatorType</code> (<code>BETWEEN</code>)</li> - </ul> - - The following compound operators are supported: - - <ul> - <li><code>NSAndPredicateType</code> (<code>AND</code>, <code>&&</code>)</li> - <li><code>NSOrPredicateType</code> (<code>OR</code>, <code>||</code>)</li> - <li><code>NSNotPredicateType</code> (<code>NOT</code>, <code>!</code>)</li> - </ul> - - The following aggregate operators are supported: - - <ul> - <li><code>NSInPredicateOperatorType</code> (<code>IN</code>)</li> - <li><code>NSContainsPredicateOperatorType</code> (<code>CONTAINS</code>)</li> - </ul> - - To test whether a feature has or lacks a specific attribute, compare the - attribute to `NULL` or `NIL`. Predicates created using the - `+[NSPredicate predicateWithValue:]` method are also supported. String - operators and custom operators are not supported. - - For details about the predicate format string syntax, consult the “Predicate - Format String Syntax” chapter of the - “<a href="https://developer.apple.com/library/content/documentation/Cocoa/Conceptual/Predicates/">Predicate Programming Guide</a>” - in Apple developer documentation. - - The predicate's left-hand expression must be a string that identifies a feature - attribute or, alternatively, one of the following special attributes: - - <table> - <thead> - <tr><th>Attribute</th><th>Meaning</th></tr> - </thead> - <tbody> - <tr> - <td><code>$id</code></td> - <td> - A value that uniquely identifies the feature in the containing source. - For details on the types of values that may be associated with this key, - consult the documentation for the <code>MGLFeature</code> protocol’s - <code>identifier</code> property. - </td> - </tr> - <tr> - <td><code>$type</code></td> - <td> - The type of geometry represented by the feature. A feature’s type is - guaranteed to be one of the following strings: - <ul> - <li> - <code>Point</code> for point features, corresponding to the - <code>MGLPointAnnotation</code> class - </li> - <li> - <code>LineString</code> for polyline features, corresponding to - the <code>MGLPolyline</code> class - </li> - <li> - <code>Polygon</code> for polygon features, corresponding to the - <code>MGLPolygon</code> class - </li> - </ul> - </td> - </tr> - <tr> - <td><code>point_count</code></td> - <td>The number of point features in a given cluster.</td> - </tr> - </tbody> - </table> - - The predicate’s right-hand expression must be an `NSString` (to match strings) - or `NSNumber` (to match numbers, including Boolean values) or an array of - `NSString`s or `NSNumber`s, depending on the operator and the type of values - expected for the attribute being tested. For floating-point values, use - `-[NSNumber numberWithDouble:]` instead of `-[NSNumber numberWithFloat:]` - to avoid precision issues. - - Automatic type casting is not performed. Therefore, a feature only matches this - predicate if its value for the attribute in question is of the same type as the - value specified in the predicate. Also, operator modifiers such as `c` (for - case insensitivity), `d` (for diacritic insensitivity), and `l` (for locale - sensitivity) 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"`. + + See the “<a href="../predicates-and-expressions.html">Predicates and Expressions</a>” + guide for details about the predicate syntax supported by this class. ### Example |