iphone - 如何选择和取消选择缩略图图像和所选图像存储在 iphone 数组中

Question

我是手机编程的新手。我在里面创建了自定义按钮，我正在为每个自定义按钮附加图像。现在自定义按钮图像以缩略图显示。现在，如果我选择任何缩略图图像或自定义按钮。在这里我想选择和取消选择缩略图图像，我想将所选图像标签值存储在数组中。如何执行此操作在我的代码下方。使用下面的代码我正在创建自定义按钮并将图像附加到自定义按钮。

blaukypath =[[NSMutableArray alloc]init];
   for (NSString* path in array)
   {
 [blaukypath addObject:[UIImage imageWithContentsOfFile:path]];
 NSLog(@"%@",path);
   }
  myScrollView = [[UIScrollView alloc]initWithFrame:CGRectMake(0.0, 0.0, 320.0, 840.0)];
  myScrollView.delegate = self;
  myScrollView.contentSize = CGSizeMake(320.0, 840.0);
  myScrollView.backgroundColor = [UIColor whiteColor];
  [self.view addSubview:myScrollView];

  float horizontal = 8.0;
  float vertical = 8.0;
  for(int i=0; i<[blaukypath count]; i++)
  {
   if((i%4) == 0 && i!=0)
   {
   horizontal = 8.0;
   vertical = vertical + 70.0 + 8.0;
   }

                    buttonImage = [UIButton buttonWithType:UIButtonTypeCustom];
                    [buttonImage setFrame:CGRectMake(horizontal, vertical, 70.0, 70.0)];
                    [buttonImage setTag:i];

                    [buttonImage setImage:[blaukypath objectAtIndex:i] forState:UIControlStateNormal];
                    [buttonImage addTarget:self action:@selector(buttonImagePressed:) forControlEvents:UIControlEventTouchUpInside];
                    [myScrollView addSubview:buttonImage];

                    horizontal = horizontal + 70.0 + 8.0;
                }

                [myScrollView setContentSize:CGSizeMake(320.0, vertical + 78.0)];


                [self.myScrollView addSubview:buttonImage];

现在，如果选择任何我想选择的缩略图图像，取消选择我想存储在数组中的缩略图图像和选定的缩略图图像。

-(void)buttonImagePressed:(id)sender
{
UIButton *btn = (UIButton*)sender;

    if (btn.tag==0)
    {
        [btn setImage:[UIImage imageNamed:@"Default.png"] forState:UIControlStateNormal];
        btn.tag=1;
    }
    else{
        [btn setImage:nil forState:UIControlStateNormal];
        btn.tag=0;
    }

有些人告诉我，通过使用上面的代码，我会工作，但我并没有完全按照我想要的方式工作。我想选择和取消选择，还选择了我想存储在数组中的图像。谢谢阿斯拉姆

Answer 1

根据UIControlState设置按钮的图像

@property(nonatomic,retain)NSMutableArray *tapCollection;

[btn setImage:[UIImage imageNamed:@"buttonBackGround.png"] forState:UIControlStateNormal];
[btn setImage:[UIImage imageNamed:@"Button_Selected.jpg"] forState:UIControlStateSelected];

-(void)viewDidLoad{

   self.tapCollection = [[NSMutableArray alloc] init];
}

-(void)buttonImagePressed:(id)sender
{
   UIButton *selectedButton = (UIButton *)sender;

  //If checked, uncheck and visa versa
  [selectedButton setSelected:![selectedButton isSelected]];

  if([selectedButton isSelected])
  {
      [self.tapCollection addObject:[NSNumber numberWithInt:btn.tag]];
  }
  else
  {
     //remove btn.tag from self.tapCollection
  }
}