NSString* hoge = @"hogehoge";
NSString* str1 = [NSString stringWithFormat:@"%@",hoge];
NSString* str2 = [NSString stringWithFormat:@"%@%@",hoge,hoge];
NSLog (str1); // タブンhogehoge
NSLog (str2); // タブンhogehogehogehoge
stringWithFormat で解決
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NSString に他の変数の内容も使いたい [NSString stringWithFormat:@"%@",hoge]
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