Initializer

init(forVariable:)

Returns a new expression that extracts a value from the variable bindings dictionary for a given key.

Declaration

init(forVariable string: String)

Parameters

string

The key for the variable to extract from the variable bindings dictionary.

Return Value

A new expression that extracts from the variable bindings dictionary the value for the key string.

See Also

Creating an Expression for a Value

init(forConstantValue: Any?)

Returns a new expression that represents a given constant value.

class func expressionForEvaluatedObject() -> NSExpression

Returns a new expression that represents the object being evaluated.

init(forKeyPath: String)

Returns a new expression that invokes valueForKeyPath: with a given key path.

class func expressionForAnyKey() -> NSExpression

Returns a new expression that represents any key for a Spotlight query.