ios 如何以编程方式更改uiimageview图像
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how to change uiimageview image's programmatically
提问by bdkhsn
In my ios application i create uiimageviews programmatically like that,
在我的 ios 应用程序中，我像这样以编程方式创建 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];
}
in my buttonActon, i want to change that uiimageview's image to another image. But i can not do that. Can anyone help me? Thank You.
在我的 buttonActon 中，我想将该 uiimageview 的图像更改为另一个图像。但我不能那样做。谁能帮我？谢谢你。
回答by Balu
try like this ,
像这样尝试，
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];
}
keep this one in button action method and pass the imageview tag in the place of imgview.tag
将此保留在按钮操作方法中，并在其位置传递 imageview 标签 imgview.tag
UIImageView *img=(UIImageView *)[scrollView viewWithTag:imgview.tag];
img.image=[UIImage imageNamed:@"name.png"];
回答by Midhun MP
Instead of this:
取而代之的是：
imageView.tag=UrunId;
Write:
写：
imageView.tag = productID + 100;
Because you need a unique tag for each Image View.
因为每个图像视图都需要一个唯一的标签。
Then implement the buttonAction:like:
然后实现buttonAction:类似：
- (void)buttonAction:(UIButton *)sender
{
UIImageView *imageView = (UIImageView *)[scrollView viewWithTag:(sender.tag+100)];
[imageView setImage:yourImage];
}
回答by Dharmbir Singh
Please try to use this one
请尝试使用这个
You should have different tag for button and image.So please give first different tag like this....
您应该为按钮和图像使用不同的标签。所以请先给出这样的不同标签....
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];
After that do this...
之后做这个...
- (void)buttonAction:(UIButton *)sender
{
UIImageView *imageView = (UIImageView *)[scrollView viewWithTag:sender.tag+1];
imageView.image=[UIImage imageNamed:@"imageName"];
}
