關於stringByReplacingCharactersInRange過濾字符串的問題

在作標籤過濾的時候，用了以下代碼，結果內存幾秒鐘就達到飽滿了。app while ((ran = [str rangeOfString:@"<[^>]+>" options:NSRegularExpressionSearch]).location != NSNotFound){             str = [str stringByReplacingCharactersInRange:ra

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