NSString，NSArray，NSDictionary 被copy、strong修飾的區別

原創 正能量_ 2020-06-04 02:44

首先是字符串NSString和NSMutableString

首先源對象是NSString，不可變 copy、strong都是是淺拷貝

 

 

再來個數組吧，和字符串是一樣的效果

首先是字符串NSArray 和NSMutableArray

同理字典也是

 

繼續

 

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