HTML ホテル フォームによるフィルタリング

@interface ViewController ()
@property (nonatomic,copy) NSString *name;
@property (nonatomic,retain) NSString *name2;
@end

-(void)test{
    NSString *str = @"I am immutable";
    self.name = str;
    self.name2 = str;
    NSLog(@" str: %p",str);
    NSLog(@" copy: %p",self.name);
    NSLog(@"retain: %p",self.name2);

}
-(void)test2{
    NSMutableString *str = [NSMutableString stringWithString:@"I am mutable"];
    self.name = str;
    self.name2 = str;
    NSLog(@" strM: %p",str);
    NSLog(@" copy: %p",self.name);
    NSLog(@"retain: %p",self.name2);
}