如何以編程方式更改uiimageview圖像

Question

在我的ios應用程序中，我以編程方式創建uiimageviews，

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];


                               }

在我的buttonActon中，我想將uiimageview的圖像更改為另一個圖像。 但我不能這樣做。 誰能幫我？ 謝謝。

Answer 1

試試這樣，

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];


                               }

將此imgview.tag保留在按鈕操作方法中，並將imageview標記傳遞給imgview.tag

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

Answer 2

而不是這個：

imageView.tag=UrunId;

寫：

imageView.tag = productID + 100;

因為每個圖像視圖都需要一個唯一的標記。

然后實現buttonAction: like：

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

Answer 3

請嘗試使用這個

你應該有不同的按鈕和圖像標簽。所以請給這樣的第一個不同的標簽....

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];

之后這樣做......

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

}