如何删除NSString中多余的空白空间？

Question

有没有简单的方法来删除字符串中的多余空格？即像...

NSString *str = @"this string has extra    empty spaces"; 

的结果应该是：

NSString *str = @"this string has extra empty spaces"; 

谢谢！

Answer 1

用一个空格替换所有双空间，直到字符串中不再有双空格。

- (NSString *)stripDoubleSpaceFrom:(NSString *)str { 
    while ([str rangeOfString:@" "].location != NSNotFound) { 
     str = [str stringByReplacingOccurrencesOfString:@" " withString:@" "]; 
    } 
    return str; 
}