Question

在我的应用程序中使用UIImageViews，我想通过使用名称为imageView0，imageView1，imageView2 .......

的for循环动态创建

我的代码如下

 for(i=0;i<number;i++)
{

        scrollViewImageToDrag = [[UIImageView alloc] initWithImage:image];
//        NSString *imageViewnameStr = [NSString stringWithFormat:@"scrollViewImageToDrag%d",i];

}

执行for循环后，它应该创建具有系列名称的UIImageViews的数字（例子10），如imageView0，imageView1，imageView2 .......

我怎样才能实现这一点。

Answer 1

当你创建UIImageView时......在一个范围内设置标签，比如说（10 --- 20）

所以。像这样初始化你的ImageView ..

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

UIImageView *ImageView = [[UIImageView alloc] init] ;
// ImageView formatting code here...

ImageView.tag = i+20;
   }

然后当你想要上面的循环（你在你的问题中给出）得到这样的UIImageView ..

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

UIImageView *ImageView = (UIImageView *)[self.view viewWithTag:i+20]; // get the ImageView with tag
}

这是解决方案.. 您无法将文字重命名为变量并使用其功能

Answer 2

无法实现您想要的效果，但如果您想区分图像视图，则可以使用标记属性。

for (int i=0; i<[getEffectsImageData count]; i++)
{
    //Your code here.....

    imageViewsArray.tag = i ;// This would become your first image. and you can differentiate from tag.

}

Answer 3

与Objective-C中的许多解释器语言不同，您无法按照建议动态创建对象名称。您可以使用数组。

NSMutableArray scrollViewImagesArray = [[NSMutableArray alloc] initWithCapacity:number];
 for(i=0;i<number;i++)
{
UIImageView *myNewImageView = [[UIImageView alloc] initWithImage:image];
[myImageView retain]; //With ARC you would not need this statement, you directly call this
myImageView.tag = i; //This may come handy to identify the images if you to not want to use
                     //or do not need to. In a table view controller you may not need that array for images in a table cell. 
[scrollViewImagesArray addObject:myNewImageView];

}

//稍后，当你不再需要图像时，不要忘记删除所有对象并释放aray（除非你使用ARC然后nil分配给数组应该这样做）。

Answer 4

 NSInteger x = y = 5;
 for(NSInteger i = 0; i < 10; i++)
 {
    UIImage *image = [UIIimage imageNamed:[NSString stringWithFormat:@"imageView%d",i]];
    UIImageView *imageView = [UIImageView alloc] init];
    [imageView setFrame:CGRectMake(x,y,45,45)];
    [imageView setImage:image];
    [imageView setTag:i];
    [yourScrollView addSubView:imageView];

    //If you want to access your ImageView by tapping

    UITapGestureRecognizer *singleTap=[[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(imageSelect:)];
    singleTap.numberOfTapsRequired=1;

    [imageView addGestureViewRecognizer:singleTap];
    image=nil;

    if(i%4==0) {
      x=0;
      y=y+50;
    } else {
     x=x+50;
   }
 }

 - (IBAction)imageSelect:(UITapGestureRecognizer *)sender {
       UIImageView *imageView=(UIImageView *)sender.view;
      //Here you can access above imageView
}

祝你好运！

动态添加UIImageView

4 个答案: