Returns whether an object is of a given type and if it is, retrieves its value.
SDKs
- iOS 2.0+
- macOS 10.3+
- Mac Catalyst 13.0+
- tvOS 9.0+
- watchOS 2.0+
Framework
- Core Graphics
Declaration
bool CGPDFObjectGetValue(CGPDFObjectParameters
objectA PDF object.
typeA PDF object type.
valueIf the
objectparameter is a PDF object of the specified type, then on return contains that object, otherwise the value is unspecified.
Return Value
Returns YES if the specified object is a PDF object of the specified type, otherwise NO.
Discussion
The function gets the value of the object parameter. If the type of object is equal to the type specified, then:
If the
valueparameter is not a null pointer, then the value ofobjectis copied tovalue, and the function returnsYES.If the
valueparameter is a null pointer, then the function simply returnsYES. This allows you to test whetherobjectis of the type specified.
If the type of object is k and type is equal to k, then the value of object is converted to floating point, the result copied to value, and the function returns YES. If none of the preceding conditions is met, returns NO.