NSObject.WillChange Method

Reference

Definition

Namespace:: Foundation

Assembly:: Xamarin.iOS.dll

Assembly:: Xamarin.Mac.dll

Important

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Overloads

WillChange(NSKeyValueChange, NSIndexSet, NSString)	Indicates that the values of the specified indices in the specified key are about to change.
WillChange(NSString, NSKeyValueSetMutationKind, NSSet)

WillChange(NSKeyValueChange, NSIndexSet, NSString)

Indicates that the values of the specified indices in the specified key are about to change.

[Foundation.Export("willChange:valuesAtIndexes:forKey:")]
public virtual void WillChange (Foundation.NSKeyValueChange changeKind, Foundation.NSIndexSet indexes, Foundation.NSString forKey);

abstract member WillChange : Foundation.NSKeyValueChange * Foundation.NSIndexSet * Foundation.NSString -> unit
override this.WillChange : Foundation.NSKeyValueChange * Foundation.NSIndexSet * Foundation.NSString -> unit

Parameters

changeKind: NSKeyValueChange

indexes: NSIndexSet

forKey: NSString

The name of the key that is going to be changed.

Attributes: ExportAttribute

Applies to

WillChange(NSString, NSKeyValueSetMutationKind, NSSet)

[Foundation.Export("willChangeValueForKey:withSetMutation:usingObjects:")]
public virtual void WillChange (Foundation.NSString forKey, Foundation.NSKeyValueSetMutationKind mutationKind, Foundation.NSSet objects);

abstract member WillChange : Foundation.NSString * Foundation.NSKeyValueSetMutationKind * Foundation.NSSet -> unit
override this.WillChange : Foundation.NSString * Foundation.NSKeyValueSetMutationKind * Foundation.NSSet -> unit