nsstring - 修剪 NSString 末尾的空格

Question

我需要删除字符串末尾的空格。我怎样才能做到这一点？示例:如果字符串是 "Hello " 它必须变成 "Hello"

Answer 1

摘自这里的答案:https://stackoverflow.com/a/5691567/251012

- (NSString *)stringByTrimmingTrailingCharactersInSet:(NSCharacterSet *)characterSet {
    NSRange rangeOfLastWantedCharacter = [self rangeOfCharacterFromSet:[characterSet invertedSet]
                                                               options:NSBackwardsSearch];
    if (rangeOfLastWantedCharacter.location == NSNotFound) {
        return @"";
    }
    return [self substringToIndex:rangeOfLastWantedCharacter.location+1]; // non-inclusive
}