如何删除撇号和空格中的NSString

Question

NSString *str = @"mario's test"; 
NSString *stringWithoutSpaces = [str stringByReplacingOccurrencesOfString:@" " withString:@""]; 

有了这个功能，我可以删除空白，但我还需要删除撇号'：

stringWithoutSpaces = "mariostest" 

Answer 1

*stringWithoutSpaces = [[str stringByReplacingOccurrencesOfString:@" " withString:@""] 
          stringByReplacingOccurrencesOfString:@"'" withString:@""];