objective c - Array copying crashes app -


<पूर्व> NSArray * mruSearchItems; NSMutableArray * mruItems; Self.mruItems = [[NSMutableArray alloc] initWithArray: [[NSUserDefaults मानक उपयोगकर्ता डीफॉल्ट] arrayForKey: @ "खोजों"]]; । । इस बिंदु पर mruItems खाली हो जाता है । । Self.mruSearchItems = [[NSArray alloc] initWithArray: self.mruItems];

अंतिम पंक्ति एक दुर्घटना का कारण बनती है। 

  EXC_BAD_ACCESS   
 ऐसा क्यों है?   
 
 
 डॉट नोटेशन सिंटैक्स ( self.mruSearchItems ) का उपयोग करने में सक्षम होने के लिए आपको < कोड।>              mruSearchItems;   
 अगर आपके पास पहले से कोई संपत्ति है (और इसे यहां नहीं दिखाया है) सुनिश्चित करें कि यह  मजबूत  है (नहीं  कमजोर ) अन्यथा आपके arrays को रिहा किया जाएगा।

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