NSObject.WillChange 方法

參考

定義

命名空間:: Foundation

組件:: Xamarin.iOS.dll

組件:: Xamarin.Mac.dll

重要

部分資訊涉及發行前產品，在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊，不做任何明確或隱含的瑕疵擔保。

多載

WillChange(NSKeyValueChange, NSIndexSet, NSString)	表示指定索引鍵中指定索引的值即將變更。
WillChange(NSString, NSKeyValueSetMutationKind, NSSet)

WillChange(NSKeyValueChange, NSIndexSet, NSString)

表示指定索引鍵中指定索引的值即將變更。

[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

參數

changeKind: NSKeyValueChange

indexes: NSIndexSet

forKey: NSString

即將變更的索引鍵名稱。

屬性: ExportAttribute

適用於

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