摘要: 使用lowercaseString,uppercaseString -(void)test{ NSString * str = @"person"; NSString * str1 = [str lowercaseString]; NSString * str2 = [str uppercaseSt 阅读全文
posted @ 2016-07-29 11:53 厚积薄发1 阅读(251) 评论(0) 推荐(0)