カテゴリやプロトコルではなく、通常のクラスの目的 C での前方宣言の例を誰でも挙げることができますか?
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1 に答える
9
/*
using a forward declaration of NSDocument, there's no need
for every source that encounters this header to include AppKit,
allowing much faster compile times and reducing dependency
changes for clients.
of course, MONThang.m will need to include AppKit to use NSDocument
- but the clients using MONThang do not need to import AppKit.
*/
@class NSDocument; // << the forward declaration
@interface MONThang : NSObject
{
NSDocument * document;
}
@end
于 2011-02-01T12:48:14.890 に答える