objective c - Access one specific element of NSMutableDictionary getting null values in iOS -

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मेरे पास एक NSMutableDictionary है जो किसी विशेष स्रोत से डेटा लोड करता है

  • वह ठीक से लोड कर रहा है और डीबगिंग करते समय मुझे यकीन है कि वह लोड कर रहा है और अंत में उसे तत्वों की सटीक संख्या है। मैं डीबगिंग के दौरान भी तत्वों को देख सकता हूं।

  • मैं सिर्फ पंक्ति के मूल्य को कुंजी value = 3 प्राप्त करना चाहता हूं ।

मैंने कोशिश की NSString * myString = [myMutabDict objectForKey: @ "3"] , यह मानते हुए कि मान स्ट्रिंग में है, और मैंने उसका अनुसरण किया डिबगर के साथ, और मुझे यकीन है कि मेरे एनसियेटिशन में इसमें तत्व हैं, और मैं डीबग करने के दौरान उन्हें देख सकता हूं, और मैं key 3 देख सकता हूं, लेकिन मुझे अभी भी मिल रहा है एक आउटपुट ... के रूप में निरर्थक

मुझे क्या याद आ रहा है?

यदि आप सुनिश्चित हैं कि आपको 3 की एक कुंजी के साथ एक मूल्य दिखाई देता है और आप कुंजी @ "3" का उपयोग करके इसे लोड नहीं कर सकते हैं, तो यह संभव है कि कुंजी एक संख्या है का प्रयोग करें:

<पूर्व> NSString * myString = [myMutableDict objectForKey: @ 3];

या आधुनिक वाक्यविन्यास: 

  NSString * myString = myMutableDict [@ 3];

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