iOS---字符串替换

//字符串替换 (把中间4位替换为*,从第3位开始,之后4个字符)

NSString *phone = [phonestringByReplacingCharactersInRange:NSMakeRange(3,4)
withString:@"****"];

phone.text = phone;

NSString *oldStr = @“这个字／符串不／需／要斜／线。”
NSString *newStr = [oldStr stringByReplacingOccurrencesOfString:@"／"
withString:@""];