iOS remove whitespace from string, line break symbol

The essence of removing the space and newline symbol is to replace the corresponding character.

nsstring* STR=~~~~~~;//1. Remove the trailing white space character and newline character str = [str stringbytrimmingcharactersinset:[nscharacterset WHITESPACEANDNEWLINECHARACTERSET]];//2. Remove whitespace and newline characters from other locations str = [str stringbyreplacingoccurrencesofstring:@ "\ r" withstring:@ ""];str = [str stringbyreplacingoccurrencesofstring:@ "\ n" withstring:@ "" ";

iOS remove whitespace from string, line break symbol