IOS開發複製的總結(深拷貝淺拷貝區別)

 1.複製可變字符串 NSMutableString * city = [NSMutableString stringWithString:@"北京"]; //複製可變副本 NSMutableString * cityCopy = [city mutableCopy]; //修改副本 [cityCopy replaceCharacte

>>阅读原文<<