declaration a @protocol in objective-c -

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@protocol की घोषणा में "USING" शब्द का क्या अर्थ है?

घोषणा है: 

  @protocol नाम USING // विधियों की घोषणा @end

उद्देश्य-सी में कीवर्ड का कोई कीवर्ड नहीं है।

दो संभावनाएं:

  • यह कहीं है मैक्रो के रूप में परिभाषित, उस मामले में आपको इसे अपने कोड में देखना होगा। (Xcode आपको इसके साथ मदद करता है यदि आप राइट-क्लिक का उपयोग करते हुए इस पर क्लिक करते हैं।)

  • फ़ाइल वास्तव में उद्देश्य-सी ++ है सी ++ से आता है, लेकिन मुझे नहीं लगता है कि @protocol के संदर्भ में एक विशेष कार्यक्षमता है।

इस तथ्य को देखते हुए कि यह लिखा है राजधानियों में, मैं कहूंगा कि यह एक मैक्रो है।


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