滚动视图中的图像

Question

我正在使用以下代码尝试在UIScrollView中显示图像。

[self.jarView addSubview:imgView]; 

它不起作用。但是，它在我将子视图添加到普通视图时起作用。我的UIScrollView被称为jarView，而imgView是一个UIImageView。

感谢

Answer 1

也能正常工作对我来说：

UIScrollView *scrollview; 
scrollview= [[UIScrollView alloc] initWithFrame:CGRectMake(,,,)];// set scroll view size 
view = [[UIView alloc] initWithFrame:CGRectMake(y1,x1,y2,x2)]; //set the view size 
UIImage *image1 = [UIImage imageNamed:imageName]; 
image=[[UIImageView alloc]initWithImage:image1];// take image size according to view 
[view addSubview:image]; 
[scrollview addSubview:view]; 
[view release]; 

最后确定scrollview多少是滚动：

scrollview.contentSize = CGSizeMake(width,height); 

Answer 2

确保您scrollView.contentSize属性值设置正确（宽度并且高度应该> 0）。

Answer 3

我给你我的示例代码。在这段代码中，我在滚动视图中添加了多个图像，并且这项工作适合我：

UIScrollView *scrollview; 

- (void)anyFunction 
{ 
    scrollview = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 30, 320, 50)]; 
    NSInteger viewcount = [cat_Products count]; // if you have four content your view count is 4..(four)..in my case i fetch it from database 

    CGFloat y2 = 0; 
    UIView *view; 
    UIImageView *imageView; 
    NSString *imageName; 

    for(int i = 0; i< viewcount; i++) 
    { 
     CGFloat y = i * 64; 
     y2 = y2 + 64; 

     view = [[UIView alloc] initWithFrame:CGRectMake(y, 0, y2, 50)]; 

     imageName = [[NSString alloc] initWithFormat:@"c%i", (i + 1)]; // my image name is c1, c2, c3, c4 so i use this 

     UIImage *image1 = [UIImage imageNamed:imageName]; 
     imageView = [[UIImageView alloc] initWithImage:image1]; 
     [view addSubview:imageView]; 
     [scrollview addSubview:view]; 
     [view release]; 
     [imageView release]; 
     [imageName release]; 
    }  

scrollview.contentSize = CGSizeMake(viewcount*64,0); //viewcount*64 because i use image width 64..and second parameter is 0..because i not wants vertical scrolling... 
[myView addSubview:scrollview]; 
[scrollview release]; 
} 

我希望这有助于。

Answer 4

在这里，我张贴我的答案。尝试一下。

您可以将所有图像加载到数组中。你也可以设计具有一个图像视图中的视图，并尝试下面的代码：

数组名称：examplearray和视图名称：exampleview

-(void)updateImagesInScrollView 
{ 
    int cnt = [examplearray count]; 

    for(int j=0; j< cnt; ++j) 
    { 
     NSArray *nibContents = [[NSBundle mainBundle] loadNibNamed:@"exampleview" 
                  owner:self 
                  options:nil]; 

     UIView *myView = [nibContents objectAtIndex:0]; 
     exampleview * rview= (exampleview *)myView; 
     /* you can get your image from the array and set the image*/ 
     rview.imageview.image = yourimage; 
     /*adding the view to your scrollview*/ 
     [self.ScrollView addSubview:rview]; 
    } 
    /* you need to set the content size of the scroll view */ 
    self.ScrollView.contentSize = CGSizeMake(X, self.mHorizontalScrollView.contentSize.height); 
}