如何在我的buttonActon改變的UIImageView圖像的編程

Question

在我的iPhone應用程序我創建UIImageViews的編程那樣，

for (int i=0; i<20; i++) { 

            productID=[products objectAtIndex:i]; 

            UIButton * button = [UIButton buttonWithType:UIButtonTypeRoundedRect]; 
            [button setFrame:CGRectMake(column*197+38 , row*350+8, 159, 45)]; 
            //[button setImage:redButtonImage forState:UIControlStateNormal]; 
            [button addTarget:self 
               action:@selector(buttonAction:) 
            forControlEvents:UIControlEventTouchUpInside]; 
            button.tag = productID; 
            [scrollView addSubview:button]; 



            UIImageView *imageView = [[UIImageView alloc]initWithFrame:CGRectMake(column*197+170, row*350+25, 13, 13)]; 
            imageView.tag=productID; 
            UIImage *image = [UIImage imageNamed:@"redImage.png"]; 
            [imageView setImage:image]; 
            [scrollView addSubview:imageView]; 


           } 

，我想是的UIImageView的形象改變到另一個圖像。但我不能那樣做。誰能幫我？謝謝。

Answer 1

嘗試這樣，

for (int i=0; i<20; i++) { 

            productID=[products objectAtIndex:i]; 

            UIButton * button = [UIButton buttonWithType:UIButtonTypeRoundedRect]; 
            [button setFrame:CGRectMake(column*197+38 , row*350+8, 159, 45)]; 
            //[button setImage:redButtonImage forState:UIControlStateNormal]; 
            [button addTarget:self 
               action:@selector(buttonAction:) 
            forControlEvents:UIControlEventTouchUpInside]; 
            button.tag = 100+productID; 
            [scrollView addSubview:button]; 



            UIImageView *imageView = [[UIImageView alloc]initWithFrame:CGRectMake(column*197+170, row*350+25, 13, 13)]; 
            imageView.tag=productID; 
            UIImage *image = [UIImage imageNamed:@"redImage.png"]; 
            [imageView setImage:image]; 
            [scrollView addSubview:imageView]; 


           } 

保持這一個按鈕操作方法，並通過ImageView的標籤在imgview.tag

 UIImageView *img=(UIImageView *)[scrollView viewWithTag:imgview.tag]; 
    img.image=[UIImage imageNamed:@"name.png"]; 

Answer 2

而不是這個地方：

imageView.tag=UrunId; 

寫：

imageView.tag = productID + 100; 

因爲您需要每個圖像視圖的唯一標籤。

然後實現buttonAction:，如：

- (void)buttonAction:(UIButton *)sender 
{ 
    UIImageView *imageView = (UIImageView *)[scrollView viewWithTag:(sender.tag+100)]; 
    [imageView setImage:yourImage]; 
} 

Answer 3

請儘量使用這一個

你應該有不同標籤的按鈕和image.So請給這樣的第一不同的標籤....

UIImageView *imageView = [[UIImageView alloc]initWithFrame:CGRectMake(column*197+170, row*350+25, 13, 13)]; 
            imageView.tag=button.tag+1; 
            UIImage *image = [UIImage imageNamed:@"redImage.png"]; 
            [imageView setImage:image]; 
            [scrollView addSubview:imageView]; 

是這樣，後...

- (void)buttonAction:(UIButton *)sender 
{ 
    UIImageView *imageView = (UIImageView *)[scrollView viewWithTag:sender.tag+1]; 
    imageView.image=[UIImage imageNamed:@"imageName"]; 

}