BindAsAttribute Class
Definition
Important
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The BindAsAttribute allows binding native NSNumber, NSValue and NSString (for enums) types into more accurate managed types.
[System.AttributeUsage(System.AttributeTargets.Property | System.AttributeTargets.Parameter | System.AttributeTargets.ReturnValue, AllowMultiple=false)]
public class BindAsAttribute : Attributetype BindAsAttribute = class
inherit Attribute- Inheritance
-
BindAsAttribute
- Attributes
Remarks
This attribute is typically used in binding projects, to indicate a special mapping between Objective-C and managed types:
// NSValue <-> CGRect (for the 'rect' parameter)
// NSNumber <-> bool? (for the return value)
[return: BindAs (typeof (bool?))]
[Export ("shouldDrawAt:")]
NSNumber ShouldDraw ([BindAs (typeof (CGRect))] NSValue rect);
// NSString <-> CAScroll
[BindAs (typeof (CAScroll []))]
[Export ("supportedScrollModes")]
NSString [] SupportedScrollModes { get; set; }
In this example, the parameter will be bound as a managed CGRect, and the return value will be bound as bool?.
| Supported combinations: |
|---|
| Between NSNumber and bool, byte, sbyte, short, ushort, int, uint, long, ulong, nint, nuint, float, double, nfloat, any of the previous as a nullable type, or as an array |
| Between NSValue and NSRange, CGAffineTransform, CGPoint, CGRect, CGSize, CGVector, NSDirectionalEdgeInsets, CATransform3d, CLLocationCoordinate2d, CMTime, CMTimeMapping, CMTimeRange, MKCoordinateSpan, SCNMatrix4, SCNVector3, SCNVector4, UIEdgeInsets, UIOffset, any of the previous as a nullable type, or as an array. |
| Between NSString-backed enums and the corresponding managed enum. |
Constructors
| BindAsAttribute(Type) |
Initializes a new BindAs attribute with the specified managed type. |
Fields
| OriginalType |
The Objective-C type. |
| Type |
The managed type. |